diff --git a/mock-server/app/http.php b/mock-server/app/http.php
index 48dbd1f390..e258b6e4a3 100644
--- a/mock-server/app/http.php
+++ b/mock-server/app/http.php
@@ -555,7 +555,7 @@
     ->label('sdk.response.type', Response::CONTENT_TYPE_JSON)
     ->label('sdk.response.model', Response::MODEL_MOCK)
     ->label('sdk.mock', true)
-    ->param('queries', [], new ArrayList(new Text(4096), APP_LIMIT_ARRAY_PARAMS_SIZE), 'Array of query strings generated using the Query class provided by the SDK.')
+    ->param('queries', [], new ArrayList(new Text(4096), APP_LIMIT_ARRAY_PARAMS_SIZE), 'Array of query strings generated using the Query class provided by the SDK.', true)
     ->inject('response')
     ->action(function (array $queries, UtopiaSwooleResponse $response) {
         $response->json(['result' => \json_encode($queries)]);
@@ -655,7 +655,9 @@
     ->label('sdk.response.model', Response::MODEL_MOCK)
     ->label('sdk.mock', true)
     ->param('documents', [], new ArrayList(new Assoc(), APP_LIMIT_ARRAY_PARAMS_SIZE), 'Array of document objects.')
-    ->action(function (array $documents) {
+    ->param('labels', null, new Nullable(new ArrayList(new Nullable(new Text(256)), APP_LIMIT_ARRAY_PARAMS_SIZE)), 'Optional labels, including null values.', true)
+    ->inject('response')
+    ->action(function (array $documents, ?array $labels, UtopiaSwooleResponse $response) {
         if ($documents === []) {
             throw new Exception(Exception::GENERAL_MOCK, 'Documents must not be empty');
         }
@@ -665,6 +667,10 @@
                 throw new Exception(Exception::GENERAL_MOCK, 'Each document must be an object with an $id');
             }
         }
+
+        $response->json([
+            'result' => \json_encode(['documents' => $documents, 'labels' => $labels]),
+        ]);
     });
 
 App::get('/v1/mock/tests/union')
diff --git a/templates/deno/src/client.ts.twig b/templates/deno/src/client.ts.twig
index 7f670efafb..cd7ce24b7d 100644
--- a/templates/deno/src/client.ts.twig
+++ b/templates/deno/src/client.ts.twig
@@ -156,6 +156,17 @@ export class Client {
         return json;
     }
 
+    static validateStringList(name: string, value: unknown, nullableItems: boolean = false): void {
+        // Missing values are left to the generated required-parameter checks.
+        if (value === null || typeof value === 'undefined') {
+            return;
+        }
+
+        if (!Array.isArray(value) || value.some((item) => typeof item !== 'string' && !(nullableItems && item === null))) {
+            throw new {{spec.info.title | caseUcfirst}}Exception(`Invalid parameter: "${name}" must be a list of strings.`, 0, 'sdk_input_validation');
+        }
+    }
+
     static flatten(data: Payload, prefix = ''): Payload {
         let output: Payload = {};
 
diff --git a/templates/deno/src/services/service.ts.twig b/templates/deno/src/services/service.ts.twig
index e0f049e0d9..b385fe6b08 100644
--- a/templates/deno/src/services/service.ts.twig
+++ b/templates/deno/src/services/service.ts.twig
@@ -87,6 +87,12 @@ export class {{ service.name | caseUcfirst }} extends Service {
             throw new {{spec.info.title | caseUcfirst}}Exception('Missing required parameter: "{{ parameter.name | caseCamel | escapeKeyword }}"');
         }
 
+{% endif %}
+{% endfor %}
+{% for parameter in (method | parameters('all')) %}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+        Client.validateStringList('{{ parameter.name | caseCamel | escapeKeyword }}', {{ parameter.name | caseCamel | escapeKeyword }}{% if (parameter | arraySchema) | schemaNullable %}, true{% endif %});
+
 {% endif %}
 {% endfor %}
         let apiPath = '{{ method.path }}'{% for parameter in (method | parameters('path')) %}.replace('{{ '{' }}{{ parameter.name }}{{ '}' }}', {% if (parameter.extensions['x-sdk-source']|default('')) == 'security' %}this.client.config['{{ parameter.extensions['x-sdk-config'] | caseLower }}']{% else %}{{ parameter.name | caseCamel | escapeKeyword }}{% endif %}){% endfor %};
diff --git a/templates/node/src/client.ts.twig b/templates/node/src/client.ts.twig
index 7d31757a64..f4629be273 100644
--- a/templates/node/src/client.ts.twig
+++ b/templates/node/src/client.ts.twig
@@ -696,6 +696,32 @@ class Client {
         return data;
     }
 
+    static validateStringList(
+        name: string,
+        value: unknown,
+        nullableItems = false,
+    ): void {
+        // Missing values are left to the generated required-parameter checks.
+        if (value === null || typeof value === 'undefined') {
+            return;
+        }
+
+        if (
+            !Array.isArray(value) ||
+            value.some(
+                (item) =>
+                    typeof item !== 'string' &&
+                    !(nullableItems && item === null),
+            )
+        ) {
+            throw new {{spec.info.title | caseUcfirst}}Exception(
+                `Invalid parameter: "${name}" must be a list of strings.`,
+                0,
+                'sdk_input_validation',
+            );
+        }
+    }
+
     static flatten(data: Payload, prefix = ''): Payload {
         let output: Payload = {};
 
diff --git a/templates/node/src/services/template.ts.twig b/templates/node/src/services/template.ts.twig
index c7aba2277c..60e94e9324 100644
--- a/templates/node/src/services/template.ts.twig
+++ b/templates/node/src/services/template.ts.twig
@@ -138,6 +138,15 @@ export class {{ service.name | caseUcfirst }} {
         }
         {%~ endif %}
         {%~ endfor %}
+        {%~ for parameter in (method | parameters('all')) %}
+        {%~ if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+        {%~ set validationArgs = ["'" ~ (parameter.name | caseCamel | escapeKeyword) ~ "'", (parameter.name | caseCamel | escapeKeyword)] %}
+        {%~ if (parameter | arraySchema) | schemaNullable %}
+        {%~ set validationArgs = validationArgs | merge(['true']) %}
+        {%~ endif %}
+        {{ 'Client.validateStringList' | jsArgs(validationArgs, 8) | raw }}
+        {%~ endif %}
+        {%~ endfor %}
 {% set pathReplacements = [] %}{% for parameter in (method | parameters('path')) %}{% set pathReplacements = pathReplacements|merge([['{' ~ parameter.name ~ '}', 'encodeURIComponent(String(' ~ (((parameter.extensions['x-sdk-source']|default('')) == 'security') ? ('this.client.config.' ~ (parameter.extensions['x-sdk-config'] | caseLower)) : (parameter.name | caseCamel | escapeKeyword)) ~ '))']]) %}{% endfor %}
         {{ method.path | tsApiPath(pathReplacements, 8) | raw }}
         const apiPayload: Payload = {};
diff --git a/templates/php/base/params.twig b/templates/php/base/params.twig
index ac781a37c6..da1f0c0b18 100644
--- a/templates/php/base/params.twig
+++ b/templates/php/base/params.twig
@@ -1,3 +1,9 @@
+{% for parameter in (method | parameters('all')) %}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+        $this->validateStringList('{{ parameter.name | caseCamel }}', ${{ parameter.name | caseCamel | escapeKeyword }}{% if (parameter | arraySchema) | schemaNullable %}, nullableItems: true{% endif %});
+
+{% endif %}
+{% endfor %}
         $apiParams = [];
 {% if (method | parameters('all')) | length %}
 {% for parameter in (method | parameters('all')) %}
diff --git a/templates/php/src/Client.php.twig b/templates/php/src/Client.php.twig
index 87b7e5e2e6..3591871f60 100644
--- a/templates/php/src/Client.php.twig
+++ b/templates/php/src/Client.php.twig
@@ -295,7 +295,7 @@ class Client
                 $method === self::METHOD_GET => $this->requestFactory->query(
                     $method,
                     $uri,
-                    $params,
+                    $this->prepareParams($params),
                     $headers
                 ),
                 $contentType === 'application/json' => $this->requestFactory->json(
@@ -374,7 +374,8 @@ class Client
     }
 
     /**
-     * Prepare params for JSON encoding by converting model objects to arrays
+     * Prepare params for encoding by converting model objects to arrays and
+     * enum objects to their values
      *
      */
     protected function prepareParams($data)
@@ -387,6 +388,10 @@ class Client
             return $data->toArray();
         }
 
+        if ($data instanceof \JsonSerializable) {
+            return $data->jsonSerialize();
+        }
+
         return $data;
     }
 
diff --git a/templates/php/src/Service.php.twig b/templates/php/src/Service.php.twig
index 394390e1d1..b121e2b760 100644
--- a/templates/php/src/Service.php.twig
+++ b/templates/php/src/Service.php.twig
@@ -9,4 +9,22 @@ abstract class Service
     public function __construct(protected Client $client)
     {
     }
+
+    protected function validateStringList(string $name, ?array $value, bool $nullableItems = false): void
+    {
+        if ($value === null) {
+            return;
+        }
+
+        // Enum objects serialize to their string value.
+        $valid = array_is_list($value) && array_all(
+            $value,
+            fn (mixed $item): bool => ($nullableItems && $item === null)
+                || is_string($item instanceof \JsonSerializable ? $item->jsonSerialize() : $item)
+        );
+
+        if (!$valid) {
+            throw new {{ namespace | split('\\') | last | caseUcfirst }}Exception('Invalid parameter: "' . $name . '" must be a list of strings.', 0, 'sdk_input_validation');
+        }
+    }
 }
diff --git a/templates/python/base/params.twig b/templates/python/base/params.twig
index e1bbc9e7b9..44c39df1c0 100644
--- a/templates/python/base/params.twig
+++ b/templates/python/base/params.twig
@@ -11,6 +11,13 @@
 {% endif -%}
 {% endif -%}
 {% endfor -%}
+{% for parameter in (method | parameters('all')) -%}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+{% set paramName = parameter.name | escapeKeyword | caseSnake -%}
+{% set validation %}        self._validate_string_list('{{ paramName }}', {{ paramName }}{% if (parameter | arraySchema) | schemaNullable %}, nullable_items=True{% endif %}){% endset %}
+{{ validation | formatCall | raw }}
+{% endif -%}
+{% endfor -%}
 {% for parameter in (method | parameters('path')) %}
         api_path = api_path.replace('{{ '{' }}{{ parameter.name }}{{ '}' }}', str(self._normalize_value({% if (parameter.extensions['x-sdk-source']|default('')) == 'security' %}self.client.get_config('{{ parameter.extensions['x-sdk-config'] | caseLower }}'){% else %}{{ parameter.name | escapeKeyword | caseSnake }}{% endif %})))
 {% endfor -%}
diff --git a/templates/python/package/client.py.twig b/templates/python/package/client.py.twig
index e9fb969571..2ed53c30dc 100644
--- a/templates/python/package/client.py.twig
+++ b/templates/python/package/client.py.twig
@@ -281,8 +281,10 @@ class Client:
 
         for key in data:
             value = data[key] if isinstance(data, dict) else key
-            finalKey = prefix + '[' + key + ']' if prefix else key
-            finalKey = prefix + '[' + str(i) + ']' if isinstance(data, list) else finalKey
+            if isinstance(data, list):
+                finalKey = prefix + '[' + str(i) + ']'
+            else:
+                finalKey = prefix + '[' + key + ']' if prefix else key
             i += 1
 
             if isinstance(value, list) or isinstance(value, dict):
diff --git a/templates/python/package/service.py.twig b/templates/python/package/service.py.twig
index abc7cf4be9..226ca5cab8 100644
--- a/templates/python/package/service.py.twig
+++ b/templates/python/package/service.py.twig
@@ -29,6 +29,20 @@ class Service:
 
         return value
 
+    def _validate_string_list(self, name: str, value: Any, nullable_items: bool = False) -> None:
+        """Validate item types; generated required checks handle missing lists."""
+        if value is None:
+            return
+
+        if not isinstance(value, list) or any(
+            not isinstance(self._normalize_value(item), str) and not (nullable_items and item is None) for item in value
+        ):
+            expected = 'strings or None' if nullable_items else 'strings'
+            raise AppwriteException(
+                f'Invalid parameter: "{name}" must be a list of {expected}.',
+                type='sdk_input_validation',
+            )
+
     def _parse_response(self, response: Any, model: Optional[Type[ModelType]] = None) -> Any:
         if model is None:
             return response
diff --git a/templates/react-native/src/client.ts.twig b/templates/react-native/src/client.ts.twig
index fc5307ed63..fef258995f 100644
--- a/templates/react-native/src/client.ts.twig
+++ b/templates/react-native/src/client.ts.twig
@@ -785,6 +785,32 @@ class Client {
             throw new {{spec.info.title | caseUcfirst}}Exception((<Error>e).message);
         }
     }
+
+    static validateStringList(
+        name: string,
+        value: unknown,
+        nullableItems = false,
+    ): void {
+        // Missing values are left to the generated required-parameter checks.
+        if (value === null || typeof value === 'undefined') {
+            return;
+        }
+
+        if (
+            !Array.isArray(value) ||
+            value.some(
+                (item) =>
+                    typeof item !== 'string' &&
+                    !(nullableItems && item === null),
+            )
+        ) {
+            throw new {{spec.info.title | caseUcfirst}}Exception(
+                `Invalid parameter: "${name}" must be a list of strings.`,
+                0,
+                'sdk_input_validation',
+            );
+        }
+    }
 }
 
 export { Client, {{spec.info.title | caseUcfirst}}Exception };
diff --git a/templates/react-native/src/services/template.ts.twig b/templates/react-native/src/services/template.ts.twig
index 8da92025be..ca9b292f21 100644
--- a/templates/react-native/src/services/template.ts.twig
+++ b/templates/react-native/src/services/template.ts.twig
@@ -142,6 +142,16 @@ export class {{ service.name | caseUcfirst }} extends Service {
             {{ ('throw new ' ~ (spec.info.title | caseUcfirst) ~ 'Exception') | tsCall('\'Missing required parameter: "' ~ (parameter.name | caseCamel | escapeKeyword) ~ '"\'', ';', 12) | raw }}
         }
 
+{% endif %}
+{% endfor %}
+{% for parameter in (method | parameters('all')) %}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+{% set validationArgs = ["'" ~ (parameter.name | caseCamel | escapeKeyword) ~ "'", (parameter.name | caseCamel | escapeKeyword)] %}
+{% if (parameter | arraySchema) | schemaNullable %}
+{% set validationArgs = validationArgs | merge(['true']) %}
+{% endif %}
+        {{ 'Client.validateStringList' | jsArgs(validationArgs, 8) | raw }}
+
 {% endif %}
 {% endfor %}
 {% set pathReplacements = [] %}{% for parameter in (method | parameters('path')) %}{% set pathReplacements = pathReplacements|merge([['{' ~ parameter.name ~ '}', 'encodeURIComponent(String(' ~ (((parameter.extensions['x-sdk-source']|default('')) == 'security') ? ('this.client.config.' ~ (parameter.extensions['x-sdk-config'] | caseLower)) : (parameter.name | caseCamel | escapeKeyword)) ~ '))']]) %}{% endfor %}
@@ -462,6 +472,16 @@ export class {{ service.name | caseUcfirst }} extends Service {
             {{ ('throw new ' ~ (spec.info.title | caseUcfirst) ~ 'Exception') | tsCall('\'Missing required parameter: "' ~ (parameter.name | caseCamel | escapeKeyword) ~ '"\'', ';', 12) | raw }}
         }
 
+{% endif %}
+{% endfor %}
+{% for parameter in (method | parameters('all')) %}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+{% set validationArgs = ["'" ~ (parameter.name | caseCamel | escapeKeyword) ~ "'", (parameter.name | caseCamel | escapeKeyword)] %}
+{% if (parameter | arraySchema) | schemaNullable %}
+{% set validationArgs = validationArgs | merge(['true']) %}
+{% endif %}
+        {{ 'Client.validateStringList' | jsArgs(validationArgs, 8) | raw }}
+
 {% endif %}
 {% endfor %}
 {% set pathReplacements = [] %}{% for parameter in (method | parameters('path')) %}{% set pathReplacements = pathReplacements|merge([['{' ~ parameter.name ~ '}', 'encodeURIComponent(String(' ~ (((parameter.extensions['x-sdk-source']|default('')) == 'security') ? ('this.client.config.' ~ (parameter.extensions['x-sdk-config'] | caseLower)) : (parameter.name | caseCamel | escapeKeyword)) ~ '))']]) %}{% endfor %}
diff --git a/templates/ruby/base/params.twig b/templates/ruby/base/params.twig
index 83a03527bb..a01f0c4164 100644
--- a/templates/ruby/base/params.twig
+++ b/templates/ruby/base/params.twig
@@ -7,6 +7,12 @@
                 raise {{spec.info.title | caseUcfirst}}::Exception.new('Missing required parameter: "{{ parameter.name | caseCamel | escapeKeyword }}"')
             end
 
+{% endif %}
+{% endfor %}
+{% for parameter in (method | parameters('all')) %}
+{% if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+            validate_string_list('{{ parameter.name | caseCamel | escapeKeyword }}', {{ parameter.name | caseSnake | escapeKeyword }}{% if (parameter | arraySchema) | schemaNullable %}, nullable_items: true{% endif %})
+
 {% endif %}
 {% endfor %}
             api_path = '{{ method.path }}'
diff --git a/templates/ruby/lib/container/service.rb.twig b/templates/ruby/lib/container/service.rb.twig
index 7468cfd86d..0fd4047559 100644
--- a/templates/ruby/lib/container/service.rb.twig
+++ b/templates/ruby/lib/container/service.rb.twig
@@ -3,5 +3,14 @@ module {{spec.info.title | caseUcfirst }}
         def initialize(client)
             @client = client
         end
+
+        private
+
+        def validate_string_list(name, value, nullable_items: false)
+            return if value.nil?
+            return if value.is_a?(Array) && value.all? { |item| item.is_a?(String) || (nullable_items && item.nil?) }
+
+            raise {{spec.info.title | caseUcfirst}}::Exception.new("Invalid parameter: \"#{name}\" must be a list of strings.", 0, 'sdk_input_validation')
+        end
     end
 end
diff --git a/templates/rust/tests/tests.rs b/templates/rust/tests/tests.rs
index 227457870c..06f8132c5a 100644
--- a/templates/rust/tests/tests.rs
+++ b/templates/rust/tests/tests.rs
@@ -1,5 +1,6 @@
 use appwrite::{
     Client,
+    enums::MockType,
     id::ID,
     input_file::InputFile,
     operator::{self, Condition},
@@ -112,6 +113,19 @@ async fn test_general_service(client: &Client, string_in_array: &[String]) -> Re
         Err(e) => eprintln!("general.redirected => error {}", e),
     }
 
+    let queries = vec!["not JSON".to_string(), MockType::First.to_string()];
+    match general.list_rows(Some(queries)).await {
+        Ok(response) => println!("{}", response.result),
+        Err(e) => eprintln!("general.list_rows => error {}", e),
+    }
+
+    let documents = vec![json!({"$id": "first"})];
+    let labels = vec!["ready".to_string()];
+    match general.create_documents(documents, Some(labels)).await {
+        Ok(response) => println!("{}", response.result),
+        Err(e) => eprintln!("general.create_documents => error {}", e),
+    }
+
     for (id, plain) in [("", "0"), ("0", "")] {
         let error = general.validate_path(plain, Some(id)).await.unwrap_err();
         assert_eq!(error.code, 0);
diff --git a/templates/web/src/client.ts.twig b/templates/web/src/client.ts.twig
index 4d68244ca3..1ded99a1d4 100644
--- a/templates/web/src/client.ts.twig
+++ b/templates/web/src/client.ts.twig
@@ -1265,6 +1265,32 @@ class Client {
         return data;
     }
 
+    static validateStringList(
+        name: string,
+        value: unknown,
+        nullableItems = false,
+    ): void {
+        // Missing values are left to the generated required-parameter checks.
+        if (value === null || typeof value === 'undefined') {
+            return;
+        }
+
+        if (
+            !Array.isArray(value) ||
+            value.some(
+                (item) =>
+                    typeof item !== 'string' &&
+                    !(nullableItems && item === null),
+            )
+        ) {
+            throw new {{spec.info.title | caseUcfirst}}Exception(
+                `Invalid parameter: "${name}" must be a list of strings.`,
+                0,
+                'sdk_input_validation',
+            );
+        }
+    }
+
     static flatten(data: Payload, prefix = ''): Payload {
         let output: Payload = {};
 
diff --git a/templates/web/src/services/template.ts.twig b/templates/web/src/services/template.ts.twig
index faa3231a0c..7785ea9711 100644
--- a/templates/web/src/services/template.ts.twig
+++ b/templates/web/src/services/template.ts.twig
@@ -141,6 +141,15 @@ export class {{ service.name | caseUcfirst }} {
         }
         {%~ endif %}
         {%~ endfor %}
+        {%~ for parameter in (method | parameters('all')) %}
+        {%~ if (parameter | schemaType) == 'array' and ((parameter | arraySchema) | schemaType) == 'string' %}
+        {%~ set validationArgs = ["'" ~ (parameter.name | caseCamel | escapeKeyword) ~ "'", (parameter.name | caseCamel | escapeKeyword)] %}
+        {%~ if (parameter | arraySchema) | schemaNullable %}
+        {%~ set validationArgs = validationArgs | merge(['true']) %}
+        {%~ endif %}
+        {{ 'Client.validateStringList' | jsArgs(validationArgs, 8) | raw }}
+        {%~ endif %}
+        {%~ endfor %}
 {% set pathReplacements = [] %}{% for parameter in (method | parameters('path')) %}{% set pathReplacements = pathReplacements|merge([['{' ~ parameter.name ~ '}', 'encodeURIComponent(String(' ~ (((parameter.extensions['x-sdk-source']|default('')) == 'security') ? ('this.client.config.' ~ (parameter.extensions['x-sdk-config'] | caseLower)) : (parameter.name | caseCamel | escapeKeyword)) ~ '))']]) %}{% endfor %}
         {{ method.path | tsApiPath(pathReplacements, 8) | raw }}
         const payload: Payload = {};
diff --git a/tests/e2e/Android16Java17Test.php b/tests/e2e/Android16Java17Test.php
index 89b36066ae..806875b006 100644
--- a/tests/e2e/Android16Java17Test.php
+++ b/tests/e2e/Android16Java17Test.php
@@ -38,6 +38,7 @@ final class Android16Java17Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Android5Java17Test.php b/tests/e2e/Android5Java17Test.php
index 919f3e411f..fe1f1f9f26 100644
--- a/tests/e2e/Android5Java17Test.php
+++ b/tests/e2e/Android5Java17Test.php
@@ -38,6 +38,7 @@ final class Android5Java17Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/AppleSwift61Test.php b/tests/e2e/AppleSwift61Test.php
index 9824bf25e4..590664ff2a 100644
--- a/tests/e2e/AppleSwift61Test.php
+++ b/tests/e2e/AppleSwift61Test.php
@@ -37,13 +37,13 @@ final class AppleSwift61Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
         ...Base::ENUM_RESPONSES,
         ...Base::MODEL_RESPONSES,
-        ...Base::OBJECT_ARRAY_RESPONSES,
         ...Base::EXCEPTION_RESPONSES,
         ...Base::REALTIME_RESPONSES,
         ...Base::COOKIE_RESPONSES,
diff --git a/tests/e2e/Base.php b/tests/e2e/Base.php
index 05840af2d3..177146b5bc 100644
--- a/tests/e2e/Base.php
+++ b/tests/e2e/Base.php
@@ -45,6 +45,25 @@ abstract class Base extends TestCase
         'GET:/v1/mock/tests/general/redirect/done:passed',
     ];
 
+    // One contract for every SDK: string lists reach the API unchanged.
+    protected const ARRAY_PARAMETER_RESPONSES = [
+        '["not JSON","first"]',
+        '{"documents":[{"$id":"first"}],"labels":["ready"]}',
+    ];
+
+    // SDKs that can receive a non-string list item at runtime reject it before
+    // any request; the mock never emits these exceptions.
+    protected const STRING_LIST_VALIDATION_RESPONSES = [
+        '{"message":"Invalid parameter: \"queries\" must be a list of strings.","type":"sdk_input_validation","code":0,"response":null}',
+        '{"message":"Invalid parameter: \"z\" must be a list of strings.","type":"sdk_input_validation","code":0,"response":null}',
+        '{"documents":[{"$id":"first"}],"labels":["ready",null]}',
+    ];
+
+    protected const NESTED_LIST_RESPONSES = [
+        'Invalid `queries` param: Value must a valid array no longer than 100 items and Value must be a valid string and at least 1 chars and no longer than 4096 chars',
+        '{"documents":[{"$id":"first","values":["0","1.5","true","false"]},{"$id":"second","nested":[{"name":"Zoë","values":[["1","2"]]}]}],"labels":null}',
+    ];
+
     protected const PATH_PARAM_RESPONSES = [
         'GET:/v1/mock/tests/general/path/grant%2Fspecial%26id:passed',
     ];
@@ -85,10 +104,6 @@ abstract class Base extends TestCase
         'POST:/v1/mock/tests/general/models/array:passed',
     ];
 
-    protected const OBJECT_ARRAY_RESPONSES = [
-        'POST:/v1/mock/tests/general/documents:passed',
-    ];
-
     protected const OPTIONAL_PARAM_RESPONSES = [
         'width=-1,height=128,name=omitted',
         'width=0,height=64,name=zero',
diff --git a/tests/e2e/DartBetaTest.php b/tests/e2e/DartBetaTest.php
index d7be20e5be..ded2aa5ceb 100644
--- a/tests/e2e/DartBetaTest.php
+++ b/tests/e2e/DartBetaTest.php
@@ -37,6 +37,7 @@ final class DartBetaTest extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/DartStableTest.php b/tests/e2e/DartStableTest.php
index 8a1c8b4512..110a97fd00 100644
--- a/tests/e2e/DartStableTest.php
+++ b/tests/e2e/DartStableTest.php
@@ -37,6 +37,7 @@ final class DartStableTest extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Deno1193Test.php b/tests/e2e/Deno1193Test.php
index cfeb21a39c..909a4d15a2 100644
--- a/tests/e2e/Deno1193Test.php
+++ b/tests/e2e/Deno1193Test.php
@@ -33,6 +33,8 @@ final class Deno1193Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Deno1303Test.php b/tests/e2e/Deno1303Test.php
index 3b07a6887f..d8460e3009 100644
--- a/tests/e2e/Deno1303Test.php
+++ b/tests/e2e/Deno1303Test.php
@@ -33,6 +33,8 @@ final class Deno1303Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/DotNet60Test.php b/tests/e2e/DotNet60Test.php
index ad8cf173f2..74c744c6ba 100644
--- a/tests/e2e/DotNet60Test.php
+++ b/tests/e2e/DotNet60Test.php
@@ -37,6 +37,7 @@ final class DotNet60Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/DotNet80Test.php b/tests/e2e/DotNet80Test.php
index 564c5b081f..7e93f68de3 100644
--- a/tests/e2e/DotNet80Test.php
+++ b/tests/e2e/DotNet80Test.php
@@ -37,6 +37,7 @@ final class DotNet80Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/DotNet90Test.php b/tests/e2e/DotNet90Test.php
index fd039e4ec5..7630d80fe0 100644
--- a/tests/e2e/DotNet90Test.php
+++ b/tests/e2e/DotNet90Test.php
@@ -37,6 +37,7 @@ final class DotNet90Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/FlutterBetaTest.php b/tests/e2e/FlutterBetaTest.php
index 21fa8c35fd..32385b81ee 100644
--- a/tests/e2e/FlutterBetaTest.php
+++ b/tests/e2e/FlutterBetaTest.php
@@ -37,6 +37,7 @@ final class FlutterBetaTest extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/FlutterStableTest.php b/tests/e2e/FlutterStableTest.php
index 27548c7f94..e57f6f5a2b 100644
--- a/tests/e2e/FlutterStableTest.php
+++ b/tests/e2e/FlutterStableTest.php
@@ -37,6 +37,7 @@ final class FlutterStableTest extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Go113Test.php b/tests/e2e/Go113Test.php
index 9cef5ef9e5..68622108ac 100644
--- a/tests/e2e/Go113Test.php
+++ b/tests/e2e/Go113Test.php
@@ -35,6 +35,7 @@ final class Go113Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Go118Test.php b/tests/e2e/Go118Test.php
index 504aeefd3a..be2f37070e 100644
--- a/tests/e2e/Go118Test.php
+++ b/tests/e2e/Go118Test.php
@@ -35,6 +35,7 @@ final class Go118Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/KotlinJava17Test.php b/tests/e2e/KotlinJava17Test.php
index 5b5e3fae51..cd8545376f 100644
--- a/tests/e2e/KotlinJava17Test.php
+++ b/tests/e2e/KotlinJava17Test.php
@@ -38,6 +38,7 @@ final class KotlinJava17Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Node18Test.php b/tests/e2e/Node18Test.php
index dfb5bdb3c8..798ab84a25 100644
--- a/tests/e2e/Node18Test.php
+++ b/tests/e2e/Node18Test.php
@@ -40,6 +40,8 @@ final class Node18Test extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Node20Test.php b/tests/e2e/Node20Test.php
index d8c00978ec..499804f658 100644
--- a/tests/e2e/Node20Test.php
+++ b/tests/e2e/Node20Test.php
@@ -40,6 +40,8 @@ final class Node20Test extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/Node26Test.php b/tests/e2e/Node26Test.php
index 60817df451..7ce07cd573 100644
--- a/tests/e2e/Node26Test.php
+++ b/tests/e2e/Node26Test.php
@@ -40,6 +40,8 @@ final class Node26Test extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
diff --git a/tests/e2e/PHP85Test.php b/tests/e2e/PHP85Test.php
index 54db9357c4..8dfffe2624 100644
--- a/tests/e2e/PHP85Test.php
+++ b/tests/e2e/PHP85Test.php
@@ -35,6 +35,8 @@ final class PHP85Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UNION_RESPONSES,
         'compound specialization: passed',
diff --git a/tests/e2e/Python310Test.php b/tests/e2e/Python310Test.php
index 8193b3129a..1dba9552d8 100644
--- a/tests/e2e/Python310Test.php
+++ b/tests/e2e/Python310Test.php
@@ -37,6 +37,9 @@ final class Python310Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
+        ...Base::NESTED_LIST_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Python311Test.php b/tests/e2e/Python311Test.php
index a16c23b8ae..56a15bd679 100644
--- a/tests/e2e/Python311Test.php
+++ b/tests/e2e/Python311Test.php
@@ -37,6 +37,9 @@ final class Python311Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
+        ...Base::NESTED_LIST_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Python312Test.php b/tests/e2e/Python312Test.php
index faf0664318..44bf5b4ddc 100644
--- a/tests/e2e/Python312Test.php
+++ b/tests/e2e/Python312Test.php
@@ -37,6 +37,9 @@ final class Python312Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
+        ...Base::NESTED_LIST_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Python313Test.php b/tests/e2e/Python313Test.php
index 1dc9fc15c3..1521a5dbd3 100644
--- a/tests/e2e/Python313Test.php
+++ b/tests/e2e/Python313Test.php
@@ -37,6 +37,9 @@ final class Python313Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
+        ...Base::NESTED_LIST_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Python39Test.php b/tests/e2e/Python39Test.php
index c4265b7b67..ae67c7b730 100644
--- a/tests/e2e/Python39Test.php
+++ b/tests/e2e/Python39Test.php
@@ -37,6 +37,9 @@ final class Python39Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
+        ...Base::NESTED_LIST_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/ReactNativeTest.php b/tests/e2e/ReactNativeTest.php
index de55ec0e6b..26e2ad66d9 100644
--- a/tests/e2e/ReactNativeTest.php
+++ b/tests/e2e/ReactNativeTest.php
@@ -46,6 +46,8 @@ final class ReactNativeTest extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
         ...Base::ENUM_RESPONSES,
diff --git a/tests/e2e/Ruby27Test.php b/tests/e2e/Ruby27Test.php
index cd6a5fcf67..a3447c296f 100644
--- a/tests/e2e/Ruby27Test.php
+++ b/tests/e2e/Ruby27Test.php
@@ -35,6 +35,8 @@ final class Ruby27Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Ruby30Test.php b/tests/e2e/Ruby30Test.php
index c240bf5527..e9b5c42684 100644
--- a/tests/e2e/Ruby30Test.php
+++ b/tests/e2e/Ruby30Test.php
@@ -35,6 +35,8 @@ final class Ruby30Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Ruby31Test.php b/tests/e2e/Ruby31Test.php
index 3786ac2705..8fe4de113a 100644
--- a/tests/e2e/Ruby31Test.php
+++ b/tests/e2e/Ruby31Test.php
@@ -35,6 +35,8 @@ final class Ruby31Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/Rust183Test.php b/tests/e2e/Rust183Test.php
index 3f50a97664..394250ca65 100644
--- a/tests/e2e/Rust183Test.php
+++ b/tests/e2e/Rust183Test.php
@@ -31,6 +31,7 @@ final class Rust183Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSE,
diff --git a/tests/e2e/Swift61Test.php b/tests/e2e/Swift61Test.php
index a93b72b224..da635d52c4 100644
--- a/tests/e2e/Swift61Test.php
+++ b/tests/e2e/Swift61Test.php
@@ -37,13 +37,13 @@ final class Swift61Test extends Base
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::NULL_PATH_RESPONSE,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
         ...Base::ENUM_RESPONSES,
         ...Base::MODEL_RESPONSES,
-        ...Base::OBJECT_ARRAY_RESPONSES,
         ...Base::EXCEPTION_RESPONSES,
         ...Base::OAUTH_RESPONSES,
         ...Base::QUERY_HELPER_RESPONSES,
diff --git a/tests/e2e/Unity2021Test.php b/tests/e2e/Unity2021Test.php
index c0f245f8ea..1e82c86d43 100644
--- a/tests/e2e/Unity2021Test.php
+++ b/tests/e2e/Unity2021Test.php
@@ -93,6 +93,7 @@ public function tearDown(): void
         ...Base::FOO_RESPONSES,
         ...Base::BAR_RESPONSES,
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::UPLOAD_RESPONSES,
         ...Base::DOWNLOAD_RESPONSES,
diff --git a/tests/e2e/WebChromiumTest.php b/tests/e2e/WebChromiumTest.php
index 3b87428f09..96935a17ec 100644
--- a/tests/e2e/WebChromiumTest.php
+++ b/tests/e2e/WebChromiumTest.php
@@ -41,6 +41,8 @@ final class WebChromiumTest extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::UPLOAD_RESPONSE,
diff --git a/tests/e2e/WebNodeTest.php b/tests/e2e/WebNodeTest.php
index 3440c51b5a..95cb94bf9d 100644
--- a/tests/e2e/WebNodeTest.php
+++ b/tests/e2e/WebNodeTest.php
@@ -42,6 +42,8 @@ final class WebNodeTest extends Base
         ...Base::BAR_RESPONSES,
         ...Base::BAR_RESPONSES, // Object params
         ...Base::GENERAL_RESPONSES,
+        ...Base::ARRAY_PARAMETER_RESPONSES,
+        ...Base::STRING_LIST_VALIDATION_RESPONSES,
         ...Base::PATH_VALIDATION_RESPONSES,
         ...Base::PATH_PARAM_RESPONSES,
         ...Base::ENUM_RESPONSES,
diff --git a/tests/e2e/languages/android/Tests.kt b/tests/e2e/languages/android/Tests.kt
index 0a452eff55..81d3641228 100644
--- a/tests/e2e/languages/android/Tests.kt
+++ b/tests/e2e/languages/android/Tests.kt
@@ -181,6 +181,9 @@ class ServiceTest {
             val result = general.redirect()
             writeToFile((result as Map<String, Any>)["result"] as String)
 
+            writeToFile(general.listRows(listOf("not JSON", MockType.FIRST.value)).result)
+            writeToFile(general.createDocuments(listOf(mapOf("\$id" to "first")), listOf("ready")).result)
+
             for ((id, plain) in listOf("" to "0", "0" to "")) {
                 try {
                     general.validatePath(plain, id)
diff --git a/tests/e2e/languages/apple/Tests.swift b/tests/e2e/languages/apple/Tests.swift
index fd68a57ea7..133318d2f0 100644
--- a/tests/e2e/languages/apple/Tests.swift
+++ b/tests/e2e/languages/apple/Tests.swift
@@ -139,6 +139,12 @@ class Tests: XCTestCase {
         let result = try await general.redirect()
         print((result as! [String: Any])["result"] as! String)
 
+        mock = try await general.listRows(queries: ["not JSON", MockType.first.rawValue])
+        print(mock.result)
+
+        mock = try await general.createDocuments(documents: [AnyCodable(["$id": "first"])], labels: ["ready"])
+        print(mock.result)
+
         for (id, plain) in [("", "0"), ("0", "")] {
             do {
                 _ = try await general.validatePath(plain: plain, id: id)
@@ -202,12 +208,6 @@ class Tests: XCTestCase {
         ])
         print(mock.result)
 
-        mock = try await general.createDocuments(documents: [
-            AnyCodable(["$id": "one", "title": "hello"]),
-            AnyCodable(["$id": "two", "title": "world"])
-        ])
-        print(mock.result)
-
         do {
             try await general.error400()
         } catch let error as AppwriteError {
diff --git a/tests/e2e/languages/dart/tests.dart b/tests/e2e/languages/dart/tests.dart
index 3cbd915553..08e90bdd1a 100644
--- a/tests/e2e/languages/dart/tests.dart
+++ b/tests/e2e/languages/dart/tests.dart
@@ -67,6 +67,12 @@ void main() async {
   final res = await general.redirect();
   print(res['result']);
 
+  response = await general.listRows(queries: ['not JSON', MockType.first.value]);
+  print(response.result);
+
+  response = await general.createDocuments(documents: [{r'$id': 'first'}], labels: ['ready']);
+  print(response.result);
+
   for (final ids in [['', '0'], ['0', '']]) {
     try {
       await general.validatePath(id: ids[0], plain: ids[1]);
diff --git a/tests/e2e/languages/deno/tests.ts b/tests/e2e/languages/deno/tests.ts
index af760f9890..ca986d9275 100644
--- a/tests/e2e/languages/deno/tests.ts
+++ b/tests/e2e/languages/deno/tests.ts
@@ -75,6 +75,35 @@ async function start() {
   // @ts-ignore
   console.log(response.result);
 
+  response = await general.listRows(["not JSON", appwrite.MockType.First]);
+  console.log(response.result);
+
+  response = await general.createDocuments([{ $id: "first" }], ["ready"]);
+  console.log(response.result);
+
+  // String-list items are checked against the schema before any request.
+  try {
+    // @ts-ignore
+    await general.listRows([{ method: "limit", values: [1] }]);
+    throw new Error("Invalid string list was accepted");
+  } catch (error) {
+    if (!(error instanceof appwrite.AppwriteException)) throw error;
+    console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+  }
+
+  try {
+    // @ts-ignore
+    await foo.post("string", 123, [1]);
+    throw new Error("Invalid string list was accepted");
+  } catch (error) {
+    if (!(error instanceof appwrite.AppwriteException)) throw error;
+    console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+  }
+
+  // @ts-ignore
+  response = await general.createDocuments([{ $id: "first" }], ["ready", null]);
+  console.log(response.result);
+
   for (const [id, plain] of [["", "0"], ["0", ""]]) {
     try {
       await general.validatePath(plain, id);
diff --git a/tests/e2e/languages/dotnet/Tests.cs b/tests/e2e/languages/dotnet/Tests.cs
index 717bdfa196..ff7f8e768b 100644
--- a/tests/e2e/languages/dotnet/Tests.cs
+++ b/tests/e2e/languages/dotnet/Tests.cs
@@ -70,6 +70,16 @@ public async Task Test1()
             var result = await general.Redirect();
             TestContext.WriteLine((result as Dictionary<string, object>)["result"]);
 
+            // Array parameter tests
+            mock = await general.ListRows(new List<string> { "not JSON", MockType.First.Value });
+            TestContext.WriteLine(mock.Result);
+
+            mock = await general.CreateDocuments(
+                documents: new List<object> { new Dictionary<string, object> { { "$id", "first" } } },
+                labels: new List<string> { "ready" }
+            );
+            TestContext.WriteLine(mock.Result);
+
             foreach (var ids in new[] { new[] { "", "0" }, new[] { "0", "" } })
             {
                 try
diff --git a/tests/e2e/languages/flutter/tests.dart b/tests/e2e/languages/flutter/tests.dart
index 2a1e10ec75..b73e077517 100644
--- a/tests/e2e/languages/flutter/tests.dart
+++ b/tests/e2e/languages/flutter/tests.dart
@@ -137,6 +137,12 @@ void main() async {
   final res = await general.redirect();
   print(res['result']);
 
+  response = await general.listRows(queries: ['not JSON', MockType.first.value]);
+  print(response.result);
+
+  response = await general.createDocuments(documents: [{r'$id': 'first'}], labels: ['ready']);
+  print(response.result);
+
   for (final ids in [['', '0'], ['0', '']]) {
     try {
       await general.validatePath(id: ids[0], plain: ids[1]);
diff --git a/tests/e2e/languages/go-v2/tests.go b/tests/e2e/languages/go-v2/tests.go
index 96f5a51dc4..5a04e19c16 100644
--- a/tests/e2e/languages/go-v2/tests.go
+++ b/tests/e2e/languages/go-v2/tests.go
@@ -114,6 +114,21 @@ func testGeneralService(client client.Client, stringInArray []string) {
 	}
 	fmt.Printf("%s\n", (*response).(map[string]interface{})["result"].(string))
 
+	listRowsResponse, err := general.ListRows(general.WithListRowsQueries([]string{"not JSON", "first"}))
+	if err != nil {
+		fmt.Printf("general.ListRows => error %v", err)
+	}
+	fmt.Printf("%s\n", listRowsResponse.Result)
+
+	documentsResponse, err := general.CreateDocuments(
+		[]interface{}{map[string]interface{}{"$id": "first"}},
+		general.WithCreateDocumentsLabels([]string{"ready"}),
+	)
+	if err != nil {
+		fmt.Printf("general.CreateDocuments => error %v", err)
+	}
+	fmt.Printf("%s\n", documentsResponse.Result)
+
 	for _, ids := range [][2]string{{"", "0"}, {"0", ""}} {
 		if _, err := general.ValidatePath(ids[1], ids[0]); err != nil {
 			fmt.Println(err)
diff --git a/tests/e2e/languages/go/tests.go b/tests/e2e/languages/go/tests.go
index d729c468e3..de6581be2f 100644
--- a/tests/e2e/languages/go/tests.go
+++ b/tests/e2e/languages/go/tests.go
@@ -114,6 +114,21 @@ func testGeneralService(client client.Client, stringInArray []string) {
 	}
 	fmt.Printf("%s\n", (*response).(map[string]interface{})["result"].(string))
 
+	listRowsResponse, err := general.ListRows(general.WithListRowsQueries([]string{"not JSON", "first"}))
+	if err != nil {
+		fmt.Printf("general.ListRows => error %v", err)
+	}
+	fmt.Printf("%s\n", listRowsResponse.Result)
+
+	documentsResponse, err := general.CreateDocuments(
+		[]interface{}{map[string]interface{}{"$id": "first"}},
+		general.WithCreateDocumentsLabels([]string{"ready"}),
+	)
+	if err != nil {
+		fmt.Printf("general.CreateDocuments => error %v", err)
+	}
+	fmt.Printf("%s\n", documentsResponse.Result)
+
 	for _, ids := range [][2]string{{"", "0"}, {"0", ""}} {
 		if _, err := general.ValidatePath(ids[1], ids[0]); err != nil {
 			fmt.Println(err)
diff --git a/tests/e2e/languages/kotlin/Tests.kt b/tests/e2e/languages/kotlin/Tests.kt
index f512c28507..c680a4af62 100644
--- a/tests/e2e/languages/kotlin/Tests.kt
+++ b/tests/e2e/languages/kotlin/Tests.kt
@@ -101,6 +101,9 @@ class ServiceTest {
             val result = general.redirect()
             writeToFile((result as Map<String, Any>)["result"] as String)
 
+            writeToFile(general.listRows(listOf("not JSON", MockType.FIRST.value)).result)
+            writeToFile(general.createDocuments(listOf(mapOf("\$id" to "first")), listOf("ready")).result)
+
             for ((id, plain) in listOf("" to "0", "0" to "")) {
                 try {
                     general.validatePath(plain, id)
diff --git a/tests/e2e/languages/node/test.js b/tests/e2e/languages/node/test.js
index e79f3ff513..b5d819c3ed 100644
--- a/tests/e2e/languages/node/test.js
+++ b/tests/e2e/languages/node/test.js
@@ -146,6 +146,32 @@ async function start() {
     response = await general.redirect();
     console.log(response.result);
 
+    response = await general.listRows(['not JSON', MockType.First]);
+    console.log(response.result);
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready']);
+    console.log(response.result);
+
+    // String-list items are checked against the schema before any request.
+    try {
+        await general.listRows([{ method: 'limit', values: [1] }]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    try {
+        await foo.post('string', 123, [1]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready', null]);
+    console.log(response.result);
+
     for (const [id, plain] of [['', '0'], ['0', '']]) {
         try {
             await general.validatePath({ id, plain });
diff --git a/tests/e2e/languages/php/test.php b/tests/e2e/languages/php/test.php
index 23481eec3d..b6cd497ff1 100644
--- a/tests/e2e/languages/php/test.php
+++ b/tests/e2e/languages/php/test.php
@@ -172,6 +172,26 @@ public function toArray(): array
 $response = $general->redirect();
 echo $response['result'] . "\n";
 
+echo $general->listRows(['not JSON', MockType::FIRST()])->result . "\n";
+echo $general->createDocuments([['$id' => 'first']], ['ready'])->result . "\n";
+
+// String-list items are checked against the schema before any request.
+try {
+    $general->listRows([['method' => 'limit', 'values' => [1]]]);
+    throw new RuntimeException('Invalid string list was accepted');
+} catch (AppwriteException $error) {
+    echo json_encode(['message' => $error->getMessage(), 'type' => $error->getType(), 'code' => $error->getCode(), 'response' => $error->getResponse()], JSON_THROW_ON_ERROR) . "\n";
+}
+
+try {
+    $foo->post('string', 123, [1]);
+    throw new RuntimeException('Invalid string list was accepted');
+} catch (AppwriteException $error) {
+    echo json_encode(['message' => $error->getMessage(), 'type' => $error->getType(), 'code' => $error->getCode(), 'response' => $error->getResponse()], JSON_THROW_ON_ERROR) . "\n";
+}
+
+echo $general->createDocuments([['$id' => 'first']], ['ready', null])->result . "\n";
+
 foreach ([['', '0'], ['0', '']] as [$id, $plain]) {
     try {
         $general->validatePath($plain, $id);
diff --git a/tests/e2e/languages/python/tests.py b/tests/e2e/languages/python/tests.py
index d4180a49b8..ea588cf460 100644
--- a/tests/e2e/languages/python/tests.py
+++ b/tests/e2e/languages/python/tests.py
@@ -12,6 +12,7 @@
 from appwrite.enums.mock_type import MockType
 from appwrite.models.player import Player
 
+import json
 import os.path
 
 client = Client()
@@ -66,6 +67,45 @@
 response = general.redirect()
 print(response['result'])
 
+print(general.list_rows(['not JSON', MockType.FIRST]).result)
+print(general.create_documents([{'$id': 'first'}], labels=['ready']).result)
+
+# String-list items are checked against the schema before any request.
+try:
+    general.list_rows([{'method': 'limit', 'values': [1]}])
+    raise AssertionError('Invalid string list was accepted')
+except AppwriteException as error:
+    print(json.dumps({'message': error.message, 'type': error.type, 'code': error.code, 'response': error.response}))
+
+try:
+    foo.post('string', 123, [1])
+    raise AssertionError('Invalid string list was accepted')
+except AppwriteException as error:
+    print(json.dumps({'message': error.message, 'type': error.type, 'code': error.code, 'response': error.response}))
+
+print(general.create_documents([{'$id': 'first'}], labels=['ready', None]).result)
+
+# Nested lists serialize by index, so raw calls reach API validation.
+try:
+    client.call('get', '/mock/tests/general/list-rows', params={'queries': [{'method': 'limit', 'values': [1]}]})
+    raise AssertionError('Nested query was accepted')
+except AppwriteException as error:
+    print(error.message)
+
+response = client.call(
+    'post',
+    '/mock/tests/general/documents',
+    {'content-type': 'multipart/form-data', 'X-Appwrite-Project': 'console'},
+    {
+        'documents': [
+            {'$id': 'first', 'values': [0, 1.5, True, False]},
+            {'$id': 'second', 'nested': [{'name': 'Zoë', 'values': [[1, 2]]}]},
+        ],
+        'file': InputFile.from_bytes(b'fixture', 'fixture.txt', 'text/plain'),
+    },
+)
+print(response['result'])
+
 for id, plain in [('', '0'), ('0', '')]:
     try:
         general.validate_path(plain, id)
@@ -98,8 +138,8 @@
 print(response.result)
 
 response = general.create_players([
-    {'id': 'player1', 'name': 'John Doe', 'score': 100},
-    {'id': 'player2', 'name': 'Jane Doe', 'score': 200}
+    Player(id='player1', name='John Doe', score=100),
+    Player(id='player2', name='Jane Doe', score=200),
 ])
 print(response.result)
 
diff --git a/tests/e2e/languages/react-native/browser.js b/tests/e2e/languages/react-native/browser.js
index 22162aa277..72ded89409 100644
--- a/tests/e2e/languages/react-native/browser.js
+++ b/tests/e2e/languages/react-native/browser.js
@@ -127,6 +127,32 @@ import {
     response = await general.redirect();
     console.log(response.result);
 
+    response = await general.listRows(['not JSON', MockType.First]);
+    console.log(response.result);
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready']);
+    console.log(response.result);
+
+    // String-list items are checked against the schema before any request.
+    try {
+        await general.listRows([{ method: 'limit', values: [1] }]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    try {
+        await foo.post('string', 123, [1]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready', null]);
+    console.log(response.result);
+
     for (const [id, plain] of [['', '0'], ['0', '']]) {
         try {
             await general.validatePath({ id, plain });
diff --git a/tests/e2e/languages/ruby/tests.rb b/tests/e2e/languages/ruby/tests.rb
index 6dd975900b..928709a78e 100644
--- a/tests/e2e/languages/ruby/tests.rb
+++ b/tests/e2e/languages/ruby/tests.rb
@@ -56,6 +56,26 @@
 response = general.redirect()
 puts response["result"]
 
+puts general.list_rows(queries: ['not JSON', MockType::FIRST]).result
+puts general.create_documents(documents: [{'$id': 'first'}], labels: ['ready']).result
+
+# String-list items are checked against the schema before any request.
+begin
+    general.list_rows(queries: [{method: 'limit', values: [1]}])
+    raise 'Invalid string list was accepted'
+rescue Appwrite::Exception => error
+    puts({message: error.message, type: error.type, code: error.code, response: error.response}.to_json)
+end
+
+begin
+    foo.post(x: 'string', y: 123, z: [1])
+    raise 'Invalid string list was accepted'
+rescue Appwrite::Exception => error
+    puts({message: error.message, type: error.type, code: error.code, response: error.response}.to_json)
+end
+
+puts general.create_documents(documents: [{'$id': 'first'}], labels: ['ready', nil]).result
+
 [['', '0'], ['0', '']].each do |id, plain|
     begin
         general.validate_path(id: id, plain: plain)
diff --git a/tests/e2e/languages/swift/Tests.swift b/tests/e2e/languages/swift/Tests.swift
index 0fa927654e..84df879a44 100644
--- a/tests/e2e/languages/swift/Tests.swift
+++ b/tests/e2e/languages/swift/Tests.swift
@@ -5,6 +5,7 @@ import FoundationNetworking
 #endif
 import Appwrite
 import JSONCodable
+import AppwriteEnums
 import AsyncHTTPClient
 import NIO
 
@@ -80,6 +81,12 @@ class Tests: XCTestCase {
         let result = try await general.redirect()
         print((result as! [String: Any])["result"] as! String)
 
+        mock = try await general.listRows(queries: ["not JSON", MockType.first.rawValue])
+        print(mock.result)
+
+        mock = try await general.createDocuments(documents: [AnyCodable(["$id": "first"])], labels: ["ready"])
+        print(mock.result)
+
         for (id, plain) in [("", "0"), ("0", "")] {
             do {
                 _ = try await general.validatePath(plain: plain, id: id)
@@ -143,12 +150,6 @@ class Tests: XCTestCase {
         ])
         print(mock.result)
 
-        mock = try await general.createDocuments(documents: [
-            AnyCodable(["$id": "one", "title": "hello"]),
-            AnyCodable(["$id": "two", "title": "world"])
-        ])
-        print(mock.result)
-
         do {
             try await general.error400()
         } catch let error as AppwriteError {
diff --git a/tests/e2e/languages/unity/Tests.cs b/tests/e2e/languages/unity/Tests.cs
index 961c04019a..3e78a86772 100644
--- a/tests/e2e/languages/unity/Tests.cs
+++ b/tests/e2e/languages/unity/Tests.cs
@@ -158,6 +158,16 @@ private async Task RunAsyncTest()
             var result = await general.Redirect();
             LogResult((result as Dictionary<string, object>)["result"]);
 
+            // Array parameter tests
+            mock = await general.ListRows(new List<string> { "not JSON", MockType.First.Value });
+            LogResult(mock.Result);
+
+            mock = await general.CreateDocuments(
+                documents: new List<object> { new Dictionary<string, object> { { "$id", "first" } } },
+                labels: new List<string> { "ready" }
+            );
+            LogResult(mock.Result);
+
             foreach (var ids in new[] { new[] { "", "0" }, new[] { "0", "" } })
             {
                 try
diff --git a/tests/e2e/languages/web/index.html b/tests/e2e/languages/web/index.html
index ebcc1ff538..c12869d8c3 100644
--- a/tests/e2e/languages/web/index.html
+++ b/tests/e2e/languages/web/index.html
@@ -195,6 +195,32 @@
             response = await general.redirect();
             console.log(response.result);
 
+            response = await general.listRows(['not JSON', MockType.First]);
+            console.log(response.result);
+
+            response = await general.createDocuments([{ $id: 'first' }], ['ready']);
+            console.log(response.result);
+
+            // String-list items are checked against the schema before any request.
+            try {
+                await general.listRows([{ method: 'limit', values: [1] }]);
+                throw new Error('Invalid string list was accepted');
+            } catch (error) {
+                if (!(error instanceof Appwrite.AppwriteException)) throw error;
+                console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+            }
+
+            try {
+                await foo.post('string', 123, [1]);
+                throw new Error('Invalid string list was accepted');
+            } catch (error) {
+                if (!(error instanceof Appwrite.AppwriteException)) throw error;
+                console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+            }
+
+            response = await general.createDocuments([{ $id: 'first' }], ['ready', null]);
+            console.log(response.result);
+
             for (const [id, plain] of [['', '0'], ['0', '']]) {
                 try {
                     await general.validatePath({ id, plain });
diff --git a/tests/e2e/languages/web/node.js b/tests/e2e/languages/web/node.js
index b8b3b30a15..0ae7e10788 100644
--- a/tests/e2e/languages/web/node.js
+++ b/tests/e2e/languages/web/node.js
@@ -124,6 +124,32 @@ async function start() {
     response = await general.redirect();
     console.log(response.result);
 
+    response = await general.listRows(['not JSON', MockType.First]);
+    console.log(response.result);
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready']);
+    console.log(response.result);
+
+    // String-list items are checked against the schema before any request.
+    try {
+        await general.listRows([{ method: 'limit', values: [1] }]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    try {
+        await foo.post('string', 123, [1]);
+        throw new Error('Invalid string list was accepted');
+    } catch (error) {
+        if (!(error instanceof AppwriteException)) throw error;
+        console.log(JSON.stringify({ message: error.message, type: error.type, code: error.code, response: error.response }));
+    }
+
+    response = await general.createDocuments([{ $id: 'first' }], ['ready', null]);
+    console.log(response.result);
+
     for (const [id, plain] of [['', '0'], ['0', '']]) {
         try {
             await general.validatePath({ id, plain });
diff --git a/tests/resources/spec-openapi3.json b/tests/resources/spec-openapi3.json
index 057f47bfe6..c0ddc6fd76 100644
--- a/tests/resources/spec-openapi3.json
+++ b/tests/resources/spec-openapi3.json
@@ -652,6 +652,15 @@
                     "items": {
                       "type": "object"
                     }
+                  },
+                  "labels": {
+                    "type": "array",
+                    "nullable": true,
+                    "description": "Optional labels, including null values.",
+                    "items": {
+                      "type": "string",
+                      "nullable": true
+                    }
                   }
                 },
                 "required": [