MCP GitHub PR Reviewer 🤖

A locally hosted Model Context Protocol (MCP) server that enables AI assistants (like Claude Desktop and Cursor) to autonomously review GitHub Pull Requests.

Features

• list_prs: Fetches open pull requests for a given repository.

• get_pr_diff: Retrieves the raw git diff of a specific PR.

• submit_review: Posts structured reviews (APPROVE, COMMENT, REQUEST_CHANGES) directly to GitHub.

• Dynamic Resource: Injects standard corporate code review guidelines into the AI's context window to standardize evaluations.

Tech Stack

• Node.js & TypeScript

• @modelcontextprotocol/sdk (Stdio Transport)

• zod (Strict runtime schema validation)

• GitHub REST API

How it Works

This server acts as a bridge between an LLM and GitHub. Using the MCP standard, the AI can discover these tools, determine when to use them, validate the inputs via Zod schemas, and execute multi-step reasoning to read code and enforce review guidelines—all without human intervention.