GitHub MCP · error fix · read from GitHub 2026-11-07

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GitHub MCP: "POST https://api.github.com/repos/{owner}/{repo}/issues/{issue_number}/comments: 403 Must…" — fixed (see the issue)

Issue: Docker MCP Toolkit OAuth integration returns 403 on write operations

Fixed
With clients supporting the latest spec, you are redirected to approve any additional scopes required instead of getting a 403 and failing.

The error

POST https://api.github.com/repos/{owner}/{repo}/issues/{issue_number}/comments: 403 Must have admin rights to Repository.

Reported in github/github-mcp-server issue #1314: “Docker MCP Toolkit OAuth integration returns 403 on write operations”.

What fixed it

Our remote server recently added support for step up auth (oauth scope challenge), so with clients supporting the latest spec you will be redirected to approve any additional scopes required rather than 403 and just fail.

— a maintainer's comment on the issue.

Source and dates

Repositorygithub/github-mcp-server
IssueDocker MCP Toolkit OAuth integration returns 403 on write operations
Evidencea maintainer's comment
StatusFixed (per the evidence)
Fixed inNo version is named
Issue closed2026-06-27
Read from GitHub2026-11-07
Approved by a person2026-11-07

This page records what the vendor's own GitHub repository says. The error text, the issue title and the quote are copied as written; the summary at the top is one sentence limited to the quote, and a person approved this fact on 2026-11-07. KanseiLink has not re-run the fix. Read the issue before applying it. Something changed? Write to contact@synapse-arrows.com.

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