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How to find out why a GitHub Actions run failed with GitHub MCP Server

Have the agent pull the failing workflow run and logs and explain the cause.

Short answer: Connect the server with the Actions toolset available; then ask the agent for the latest failed run on your branch; Have it read the logs and point to the failing step. All steps.

Who it is forA maintainer staring at a red CI badge with a long log.

The problemReading CI logs to find the one failing line is slow.

The outcomeThe failing step, the likely cause and a proposed fix, optionally as a PR.

What you need first

  • A GitHub account
  • An MCP host such as VS Code, Claude Code or Cursor
  • For local use: Docker and a GitHub personal access token

Steps

  1. Connect the server with the Actions toolset available
  2. Ask the agent for the latest failed run on your branch
  3. Have it read the logs and point to the failing step
  4. Ask it to propose a fix and open a PR for review

Prompt for your agent

Using github/github-mcp-server, find the most recent failed GitHub Actions run on <branch> in <owner/repo>, explain the failing step, and draft a fix as a pull request I can review.

Caveat.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for github/github-mcp-server and "Find out why a GitHub Actions run failed"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

Cursor, ChatGPT, others

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