Github Webhook MCP server

github-webhook-mcp

Real-time GitHub webhook notifications for Claude via Cloudflare Worker + Durable Object.

Architecture

GitHub ──POST──▶ Cloudflare Worker ──▶ Durable Object (SQLite)
                                           │
                                           ├── MCP tools (Streamable HTTP)
                                           ├── WebSocket real-time stream
                                           │
                          ┌────────────────┘
                          │
     Desktop / Codex: .mcpb local bridge ──▶ polling via MCP tools
     Claude Code CLI: .mcpb local bridge ──▶ WebSocket → channel notifications

• Cloudflare Worker receives GitHub webhooks, verifies signatures, stores events in a Durable Object with SQLite.
• Local MCP bridge (.mcpb) proxies tool calls to the Worker and optionally connects via WebSocket for real-time channel notifications.
• No local webhook receiver or tunnel required.

Breaking change: MCP protocol revision 2026-07-28

From this release the Worker serves MCP protocol revision 2026-07-28 only. It keeps no compatibility lane for the previous revision.

• Bridge versions older than this release stop working. They open a session with initialize, which the Worker no longer answers. The failure is quiet: the bridge does not crash, it returns the protocol error as tool output text.
• Real-time channel notifications keep arriving, which hides the breakage. The /events stream is not MCP and is unaffected, so a stale bridge still pushes event summaries while every tool call — including mark_processed — fails. The pending queue stops being cleared even though notifications look healthy.
• Restart the MCP client to pick up the new bridge. The bridge is launched with npx, and @latest is resolved at process start — an already-running Claude Desktop, Claude Code, or Codex keeps the copy it started with, however new the published version is. Quit it fully and reopen.
• Pinning the bridge version leaves you stuck. If your MCP client config pins a version older than this release, restarting does not help; remove the pin (or move it forward) first.

The Worker and the bridge ship together, so a bridge from this release or later needs no configuration change.

Prerequisites

Getting Started

1. Install the GitHub App

Install the GitHub Webhook MCP app on your GitHub organization or account:

1. Visit the GitHub App installation page
2. Select the organization or account to install on
3. Choose which repositories to grant access to (or all repositories)
4. Approve the requested permissions

Note: When the app requests new permissions after an update, you must approve them in your GitHub notification or the app's installation settings. Webhooks will not be delivered until permissions are accepted.

Important: Do not create a separate repository webhook for the same endpoint. The GitHub App handles all webhook delivery — a repository webhook would cause duplicate or malformed requests.

2. Set up the MCP client

Continue to the Installation guide to connect your AI assistant to the webhook service.

Installation

See the Installation wiki page for the full setup guide, including:

• Quick Start with the preview instance
• MCP Client Setup for Claude Desktop, Claude Code CLI, and Codex
• Self-Hosting Guide for Cloudflare Workers deployment

Updating

Shortened. The full README is on GitHub.