diff --git a/examples/src/main/java/dev/braintrust/examples/TriviaEvaluation.java b/examples/src/main/java/dev/braintrust/examples/TriviaEvaluation.java
index 73d4524..f6a3da7 100644
--- a/examples/src/main/java/dev/braintrust/examples/TriviaEvaluation.java
+++ b/examples/src/main/java/dev/braintrust/examples/TriviaEvaluation.java
@@ -61,17 +61,18 @@ public static void main(String[] args) throws Exception {
 
         // Show experiment URL
         var appUrl = config.appUrl().toString().replaceAll("/$", "");
+        var orgNameEncoded =
+                java.net.URLEncoder.encode(
+                                config.orgName().orElse("unknown"),
+                                java.nio.charset.StandardCharsets.UTF_8)
+                        .replace("+", "%20");
         var projectNameEncoded =
                 java.net.URLEncoder.encode(project.name(), java.nio.charset.StandardCharsets.UTF_8)
                         .replace("+", "%20");
         var experimentUrl =
-                appUrl.contains("staging")
-                        ? String.format(
-                                "%s/app/%s/p/%s/experiments/%s",
-                                appUrl, project.orgId(), projectNameEncoded, experimentName)
-                        : String.format(
-                                "%s/app/braintrustdata.com/p/%s/experiments/%s",
-                                appUrl, projectNameEncoded, experimentName);
+                String.format(
+                        "%s/app/%s/p/%s/experiments/%s",
+                        appUrl, orgNameEncoded, projectNameEncoded, experimentName);
 
         System.out.println("\nExperiment " + experimentName + " is running at " + experimentUrl);
 
diff --git a/src/main/java/dev/braintrust/api/BraintrustApiClient.java b/src/main/java/dev/braintrust/api/BraintrustApiClient.java
index 108a641..9f2293c 100644
--- a/src/main/java/dev/braintrust/api/BraintrustApiClient.java
+++ b/src/main/java/dev/braintrust/api/BraintrustApiClient.java
@@ -109,6 +109,12 @@ public CompletableFuture<List<Dataset>> listDatasets(String projectId) {
                 .thenApply(DatasetList::datasets);
     }
 
+    /** Login to get user information including organization details. */
+    public CompletableFuture<LoginResponse> login() {
+        var request = new LoginRequest(config.apiKey());
+        return postAsync("/api/apikey/login", request, LoginResponse.class);
+    }
+
     // Low-level HTTP methods
 
     private <T> CompletableFuture<T> getAsync(String path, Class<T> responseType) {
@@ -176,8 +182,8 @@ private <T> T handleResponse(HttpResponse<String> response, Class<T> responseTyp
     }
 
     private boolean isNotFound(Throwable error) {
-        if (error instanceof ApiException apiException) {
-            return apiException.getMessage().contains("404");
+        if (error instanceof ApiException) {
+            return ((ApiException) error).getMessage().contains("404");
         }
         return false;
     }
@@ -220,6 +226,7 @@ public record CreateExperimentRequest(
             String name,
             Optional<String> description,
             Optional<String> baseExperimentId) {
+
         public CreateExperimentRequest(String projectId, String name) {
             this(projectId, name, Optional.empty(), Optional.empty());
         }
@@ -263,4 +270,11 @@ public DatasetEvent(Object input, Object output) {
     private record InsertEventsRequest(List<DatasetEvent> events) {}
 
     public record InsertEventsResponse(int insertedCount) {}
+
+    // User and Organization models for login functionality
+    public record OrganizationInfo(String id, String name) {}
+
+    private record LoginRequest(String token) {}
+
+    public record LoginResponse(List<OrganizationInfo> orgInfo) {}
 }
diff --git a/src/main/java/dev/braintrust/config/BraintrustConfig.java b/src/main/java/dev/braintrust/config/BraintrustConfig.java
index 5589412..6057de6 100644
--- a/src/main/java/dev/braintrust/config/BraintrustConfig.java
+++ b/src/main/java/dev/braintrust/config/BraintrustConfig.java
@@ -1,5 +1,6 @@
 package dev.braintrust.config;
 
+import dev.braintrust.api.BraintrustApiClient;
 import java.net.URI;
 import java.time.Duration;
 import java.util.Optional;
@@ -18,6 +19,7 @@ public final class BraintrustConfig {
     private final URI apiUrl;
     private final URI appUrl;
     @Nullable private final String defaultProjectId;
+    @Nullable private final String orgName;
     private final boolean enableTraceConsoleLog;
     private final boolean debug;
     private final Duration requestTimeout;
@@ -27,6 +29,7 @@ private BraintrustConfig(Builder builder) {
         this.apiUrl = builder.apiUrl;
         this.appUrl = builder.appUrl;
         this.defaultProjectId = builder.defaultProjectId;
+        this.orgName = builder.orgName;
         this.enableTraceConsoleLog = builder.enableTraceConsoleLog;
         this.debug = builder.debug;
         this.requestTimeout = builder.requestTimeout;
@@ -48,6 +51,10 @@ public Optional<String> defaultProjectId() {
         return Optional.ofNullable(defaultProjectId);
     }
 
+    public Optional<String> orgName() {
+        return Optional.ofNullable(orgName);
+    }
+
     public boolean enableTraceConsoleLog() {
         return enableTraceConsoleLog;
     }
@@ -65,12 +72,14 @@ public static Builder builder() {
         return new Builder();
     }
 
-    /** Creates a config from environment variables only. */
+    /** Creates a config from environment variables and retrieves organization name from API. */
     public static BraintrustConfig fromEnvironment() {
         return builder().build();
     }
 
-    /** Creates a config with a consumer for customization. */
+    /**
+     * Creates a config with a consumer for customization and retrieves organization name from API.
+     */
     public static BraintrustConfig create(Consumer<Builder> customizer) {
         var builder = builder();
         customizer.accept(builder);
@@ -82,6 +91,7 @@ public static final class Builder {
         private URI apiUrl;
         private URI appUrl;
         private String defaultProjectId;
+        private String orgName;
         private boolean enableTraceConsoleLog;
         private boolean debug;
         private Duration requestTimeout = Duration.ofSeconds(30);
@@ -125,6 +135,11 @@ public Builder defaultProjectId(String projectId) {
             return this;
         }
 
+        public Builder orgName(String orgName) {
+            this.orgName = orgName;
+            return this;
+        }
+
         public Builder enableTraceConsoleLog(boolean enable) {
             this.enableTraceConsoleLog = enable;
             return this;
@@ -146,9 +161,40 @@ public BraintrustConfig build() {
                         "API key is required. Set BRAINTRUST_API_KEY environment variable or use"
                                 + " apiKey() method.");
             }
+
+            // If orgName is not already set, try to retrieve it from the API
+            if (orgName == null || orgName.isBlank()) {
+                try {
+                    retrieveOrgName();
+                } catch (Exception e) {
+                    // Log warning but don't fail the build if org name retrieval fails
+                    System.err.println(
+                            "Warning: Failed to retrieve organization name: " + e.getMessage());
+                }
+            }
+
             return new BraintrustConfig(this);
         }
 
+        private void retrieveOrgName() {
+            // Create a temporary config without orgName to avoid circular dependency
+            var tempConfig = new BraintrustConfig(this);
+
+            try (var apiClient = new BraintrustApiClient(tempConfig)) {
+                var loginResponse = apiClient.login().join();
+                var orgInfo = loginResponse.orgInfo();
+
+                if (orgInfo != null && !orgInfo.isEmpty()) {
+                    // Use the first organization by default, similar to Python SDK
+                    this.orgName = orgInfo.get(0).name();
+                } else {
+                    throw new RuntimeException("User is not part of any organizations");
+                }
+            } catch (Exception e) {
+                throw new RuntimeException("Failed to retrieve organization information", e);
+            }
+        }
+
         private static String getEnv(String key, String defaultValue) {
             String value = System.getenv(key);
             // Trim any whitespace that might have been accidentally included