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Move the template tools to the paginated /api/templates API - #154

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izikaj merged 5 commits into
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use-email-templates-api
Oct 9, 2026
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izikaj merged 5 commits into
mainfrom
use-email-templates-api

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@izikaj

@izikaj izikaj commented Oct 6, 2026 •

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Motivation

mailtrap-nodejs 5.0 (mailtrap/mailtrap-nodejs#165) moves client.templates to the paginated /api/templates endpoints: responses are wrapped in data, and the list is paginated with token / per_page. Without this change, the first bump to 5.0 breaks all five template tools: for example, getList() resolves { data, pagination } instead of an array.

The tools move to the new API together with the SDK. The endpoints are still experimental, so their shapes may change before general availability; the tools only depend on the fields they print.

Changes

  • create-template, get-template and update-template unwrap the { data } envelope; delete-template is unchanged; their inputs and outputs do not change
  • list-templates takes optional token and per_page (validated with Zod, like list-email-campaigns), returns one page, and names the token for the next page when more templates exist. Before, it returned every template in one call
  • get-template shows (none) for a null HTML body and leaves out a null text body
  • README, CLAUDE.md, manifest.json and the tool description describe the paginated list-templates
  • mailtrap is bumped to ^5.0.0 (published), so npm run lint type-checks against the new client

How to test

You'll need MAILTRAP_API_TOKEN and MAILTRAP_ACCOUNT_ID.

  • npm run lint and npm test pass
  • With npm run dev, list-templates with per_page: 1 lists one template and names token 2 and per_page 1 when more exist; calling it with those values lists the next one
  • create-template with only text, then get-template on it, shows HTML body: (none); update-template and delete-template behave as before

Summary by CodeRabbit

  • New Features
    • Template listings support page-token pagination, with optional page tokens and page sizes up to 100. Results identify the current page and provide guidance for navigating pages, including when a page is empty.
  • Bug Fixes
    • Invalid page sizes are rejected before a request is made. Template details display “(none)” when the HTML body is null, and template creation, retrieval, and updates correctly process API responses.

mailtrap 5.0 moves client.templates to the paginated /api/templates
endpoints and keeps the 4.x resource as client.emailTemplates. The five
template tools keep the /api/email_templates behavior, so only the
property name changes.

The mailtrap dependency points at the mailtrap-nodejs templates-api
branch until 5.0 is published.
- Call client.templates and unwrap the { data } envelope in
  create-template, get-template and update-template.
- list-templates takes optional token and per_page, returns one page, and
  names the token for the next page, like list-email-campaigns.
- Cover null bodies, the next-page hint and per_page validation.
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Reviewing files that changed from the base of the PR and between 3504b6d and a9bb884.

⛔ Files ignored due to path filters (1)
  • package-lock.json is excluded by !**/package-lock.json
📒 Files selected for processing (7)
  • CLAUDE.md
  • README.md
  • manifest.json
  • package.json
  • src/server.ts
  • src/tools/templates/__tests__/listTemplates.test.ts
  • src/tools/templates/listTemplates.ts
🚧 Files skipped from review as they are similar to previous changes (1)
  • manifest.json

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📝 Walkthrough

Walkthrough

Template tools now read template data from SDK responses. The list-templates tool validates pagination parameters, requests one page, and can return instructions to navigate between pages.

Changes

Template tools

Layer / File(s) Summary
SDK response data
package.json, src/tools/templates/createTemplate.ts, src/tools/templates/getTemplate.ts, src/tools/templates/updateTemplate.ts, src/tools/templates/__tests__/*Template.test.ts
The mailtrap dependency range changes to ~5.0.0. Create, get, and update tools now read templates from the SDK response’s data property. Tests use the same response shape. Get-template tests also cover null body values.
List-templates pagination
src/tools/templates/schemas/listTemplates.ts, src/tools/templates/listTemplates.ts, src/tools/templates/__tests__/listTemplates.test.ts, README.md, CLAUDE.md, manifest.json, src/server.ts
The list tool accepts optional token and per_page parameters, with per_page capped at 100. It validates input, displays current-page results, and includes page-navigation instructions based on pagination tokens. Tests and tool descriptions cover the paginated behavior.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant listTemplates
  participant listTemplatesZod
  participant mailtrap.templates.getList
  Caller->>listTemplates: Provide token and per_page
  listTemplates->>listTemplatesZod: Validate input
  listTemplates->>mailtrap.templates.getList: Request page with parsed parameters
  mailtrap.templates.getList-->>listTemplates: Return page data and pagination tokens
  listTemplates-->>Caller: Return page results and page-navigation instructions
Loading

Merge Risk: ⚪ Minimal · up to a9bb8

Template operations match the SDK contract, and listing provides guidance for empty pages and deletions. No concrete regression remains; the change is ready for normal validation.

Architecture Summary

Architecture risk: 🟡 Medium · up to a9bb8

The change affects 5 systems.

Changed systems: src, CLAUDE.md, manifest.json, package.json, README.md

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

  • observed — src (service) was modified; 10 changed files map to changed impact.
  • observed — CLAUDE.md (service) was modified; 1 changed file maps to changed impact.
  • observed — manifest.json (service) was modified; 1 changed file maps to changed impact.
  • observed — package.json (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

  • observed — Modified behavior in src/tools/templates/tests/createTemplate.test.ts: The mock create call now resolves to { data: mockResponse } instead of resolving directly to mockResponse.
  • observed — Modified behavior in src/tools/templates/tests/getTemplate.test.ts: The successful API mock now returns the template under a data property.
  • observed — Modified behavior in src/tools/templates/tests/getTemplate.test.ts: The text-body omission test now covers body_text: null instead of a missing (undefined) value.
  • observed — Modified behavior in src/tools/templates/tests/getTemplate.test.ts: A test was added asserting that a null HTML body is rendered as (none).

Reliability and maintainability

  • inferred — Risk-relevant change factors for src: blast_radius_1; direct_dependents_1
🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 10 files. (4 skipped: 4… Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly and concisely describes the main change: moving the template tools to the paginated templates API.
Description check ✅ Passed The description includes the required Motivation, Changes, and How to test sections. It provides specific implementation details and test steps. The Images and GIFs section is missing, but this is non…
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 10 files. (4 skipped: 4 unsupported.)

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@izikaj izikaj changed the title Call client.emailTemplates for the template tools Move the template tools to the paginated /api/templates API Oct 6, 2026
@izikaj
izikaj marked this pull request as ready for review October 8, 2026 06:22

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/tools/templates/listTemplates.ts:
- Line 26: Update the empty-templates branch in listTemplates to report that the
selected page is empty rather than claiming the account has no templates, and
preserve any pagination instruction derived from response.pagination.next_token.

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ℹ️ Review info
⚙️ Run configuration
  • Configuration used: Organization UI
  • Review profile: CHILL
  • Plan: Advanced
  • Run ID: a87acc13-764d-43b3-8748-ed89a894cef4
📥 Commits

Reviewing files that changed from the base of the PR and between 6272835 and 91ae5c6.

⛔ Files ignored due to path filters (1)
  • package-lock.json is excluded by !**/package-lock.json
📒 Files selected for processing (14)
  • CLAUDE.md
  • README.md
  • manifest.json
  • package.json
  • src/server.ts
  • src/tools/templates/__tests__/createTemplate.test.ts
  • src/tools/templates/__tests__/getTemplate.test.ts
  • src/tools/templates/__tests__/listTemplates.test.ts
  • src/tools/templates/__tests__/updateTemplate.test.ts
  • src/tools/templates/createTemplate.ts
  • src/tools/templates/getTemplate.ts
  • src/tools/templates/listTemplates.ts
  • src/tools/templates/schemas/listTemplates.ts
  • src/tools/templates/updateTemplate.ts

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Comment thread src/tools/templates/listTemplates.ts
Comment thread src/tools/templates/listTemplates.ts
Comment thread package.json Outdated
@izikaj
izikaj merged commit 60438e7 into main Oct 9, 2026
2 checks passed
@izikaj
izikaj deleted the use-email-templates-api branch October 9, 2026 14:44
@github-actions github-actions Bot mentioned this pull request Oct 9, 2026
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3 participants