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docs: update MCP server OAuth redirect port documentation#24844

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adamfweidman merged 1 commit intomainfrom
fix-mcp-oauth-port-docs
Apr 8, 2026
Merged

docs: update MCP server OAuth redirect port documentation#24844
adamfweidman merged 1 commit intomainfrom
fix-mcp-oauth-port-docs

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@adamfweidman
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Summary

Update the MCP server documentation to accurately reflect the OAuth redirect port behavior. Following the refactor in #20895, the CLI now uses a random OS-assigned port for the OAuth callback by default instead of hardcoding port 7777. This prevents port collisions.

Details

  • Modified docs/tools/mcp-server.md to specify that <random-port> is used by default.
  • Clarified that a custom redirectUri can still be provided to force a specific callback URL/port.

Related Issues

N/A

How to Validate

  1. Read the updated documentation in docs/tools/mcp-server.md.
  2. Observe that the OAuth section now mentions <random-port>.

Pre-Merge Checklist

  • Updated relevant documentation and README (if needed)
  • Added/updated tests (if needed)
  • Noted breaking changes (if any)
  • Validated on required platforms/methods:
    • MacOS
      • npm run
      • npx
      • Docker
      • Podman
      • Seatbelt
    • Windows
      • npm run
      • npx
      • Docker
    • Linux
      • npm run
      • npx
      • Docker

The default port for the OAuth callback was changed from 7777 to a
random OS-assigned port in #20895, but the documentation still
stated that it defaulted to 7777. This commit updates the documentation
to reflect the current behavior.
@adamfweidman adamfweidman requested review from a team as code owners April 7, 2026 18:23
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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the documentation for the MCP server to align with recent changes in the CLI. By moving away from a hardcoded port for OAuth callbacks, the system now avoids potential port collisions, and this documentation update ensures users are correctly informed about the new default behavior and their configuration options.

Highlights

  • Documentation Update: Updated the MCP server documentation to reflect that the OAuth callback now uses a random OS-assigned port by default instead of a hardcoded port.
  • Configuration Clarification: Added clarification that users can still specify a custom redirect URI if they require a specific port.
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gemini-cli bot commented Apr 7, 2026

Hi @adamfweidman, thank you so much for your contribution to Gemini CLI! We really appreciate the time and effort you've put into this.

We're making some updates to our contribution process to improve how we track and review changes. Please take a moment to review our recent discussion post: Improving Our Contribution Process & Introducing New Guidelines.

Key Update: Starting January 26, 2026, the Gemini CLI project will require all pull requests to be associated with an existing issue. Any pull requests not linked to an issue by that date will be automatically closed.

Thank you for your understanding and for being a part of our community!

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Code Review

This pull request updates the documentation for the MCP server's OAuth authentication to reflect that the default redirect URI now uses an OS-assigned random port instead of a hardcoded one. I have no feedback to provide.

Note: Security Review has been skipped due to the limited scope of the PR.

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github-actions bot commented Apr 7, 2026

Size Change: -4 B (0%)

Total Size: 34 MB

Filename Size Change
./bundle/chunk-7CWTJVNG.js 0 B -3.15 MB (removed) 🏆
./bundle/chunk-COCTVCSZ.js 0 B -14.8 MB (removed) 🏆
./bundle/core-Q5PCQDKD.js 0 B -45.2 kB (removed) 🏆
./bundle/devtoolsService-JGVDKLVT.js 0 B -28.4 kB (removed) 🏆
./bundle/interactiveCli-SVC5NVFC.js 0 B -1.64 MB (removed) 🏆
./bundle/oauth2-provider-6ARXO6VQ.js 0 B -9.16 kB (removed) 🏆
./bundle/chunk-RYWH76Z4.js 14.8 MB +14.8 MB (new file) 🆕
./bundle/chunk-XV3W5KIH.js 3.15 MB +3.15 MB (new file) 🆕
./bundle/core-DQPUIXUY.js 45.2 kB +45.2 kB (new file) 🆕
./bundle/devtoolsService-C7CDIJKG.js 28.4 kB +28.4 kB (new file) 🆕
./bundle/interactiveCli-6DVG5BOT.js 1.64 MB +1.64 MB (new file) 🆕
./bundle/oauth2-provider-TFO3OR27.js 9.16 kB +9.16 kB (new file) 🆕
ℹ️ View Unchanged
Filename Size
./bundle/bundled/third_party/index.js 8 MB
./bundle/chunk-34MYV7JD.js 2.45 kB
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./bundle/sandbox-macos-restrictive-open.sb 3.36 kB
./bundle/sandbox-macos-restrictive-proxied.sb 3.56 kB
./bundle/sandbox-macos-strict-open.sb 4.82 kB
./bundle/sandbox-macos-strict-proxied.sb 5.02 kB
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compressed-size-action

@gemini-cli gemini-cli bot added area/agent Issues related to Core Agent, Tools, Memory, Sub-Agents, Hooks, Agent Quality 🔒 maintainer only ⛔ Do not contribute. Internal roadmap item. labels Apr 7, 2026
@adamfweidman adamfweidman added this pull request to the merge queue Apr 8, 2026
Merged via the queue into main with commit 1b3e7d6 Apr 8, 2026
29 of 30 checks passed
@adamfweidman adamfweidman deleted the fix-mcp-oauth-port-docs branch April 8, 2026 15:07
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