Replaced fetch with node-fetch

[codebycarson]

Fetch can be unavailable on some versions of node 18, this PR explicitly uses node-fetch for full backwards compatibility.

[changeset-bot]

🦋 Changeset detected

Latest commit: 83b3146

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sei-js/mcp-server	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[Copilot]

Pull Request Overview

This PR replaces the usage of the global fetch API with the explicit node-fetch package to ensure backwards compatibility with Node.js 18 versions that may not have the global fetch available.

• Adds node-fetch and its type definitions as dependencies
• Updates test mocking to use node-fetch instead of global fetch
• Imports node-fetch in modules that make HTTP requests

Reviewed Changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/mcp-server/package.json	Adds node-fetch dependency and type definitions
packages/mcp-server/src/tests/core/tools.test.ts	Updates test mocking from global fetch to node-fetch
packages/mcp-server/src/mintlify/search.ts	Adds node-fetch import for HTTP requests
packages/mcp-server/src/docs/server.ts	Adds node-fetch import for HTTP requests
.changeset/lovely-sloths-help.md	Documents the change for version tracking

Comments suppressed due to low confidence (1)

packages/mcp-server/package.json:33

• The node-fetch version ^2.7.0 uses CommonJS modules which may cause compatibility issues with ESM imports. Consider upgrading to node-fetch version 3.x which supports ESM, or ensure proper configuration for CommonJS compatibility.

		"node-fetch": "^2.7.0",

[kamwithak]

LGTM

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (ade22d6) to head (83b3146).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #281   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           70        70           
  Lines          843       844    +1     
  Branches       139       139           
=========================================
+ Hits           843       844    +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.