sentry-mcp

This is a prototype of a remote MCP sever, acting as a middleware to the upstream Sentry API provider.

It is based on Cloudflare's work towards remote MCPs.

Getting Started

You'll find everything you need to know by visiting the deployed service in production:

https://mcp.sentry.dev

If you're looking to contribute, learn how it works, or to run this for self-hosted Sentry, continue below..

Stdio vs Remote

While this repository is focused on acting as an MCP service, we also support a stdio transport. This is still a work in progress, but is the easiest way to adapt run the MCP against a self-hosted Sentry install.

To utilize the stdio transport, you'll need to create an User Auth Token in Sentry with the necessary scopes. As of writing this is:

org:read
project:read
project:write
team:read
team:write
event:write

Launch the transport:

npx @sentry/mcp-server@latest --access-token=sentry-user-token --host=sentry.example.com

Note: You can also use environment variables:

SENTRY_ACCESS_TOKEN=
SENTRY_HOST=

MCP Inspector

MCP includes an Inspector, to easily test the service:

pnpm inspector

Enter the MCP server URL (http://localhost:5173) and hit connect. This should trigger the authentication flow for you.

Note: If you have issues with your OAuth flow when accessing the inspector on 127.0.0.1, try using localhost instead by visiting http://localhost:6274.

Local Development

To contribute changes against the server, you'll need to set things up in in local development. This will require you to create another OAuth App in Sentry (Settings => API => Applications):

• For the Homepage URL, specify http://localhost:5173
• For the Authorized Redirect URIs, specify http://localhost:5173/callback
• Note your Client ID and generate a Client secret.
• Create a .dev.vars file in packages/mcp-cloudflare/ root with:

# packages/mcp-cloudflare/.dev.vars
SENTRY_CLIENT_ID=your_development_sentry_client_id
SENTRY_CLIENT_SECRET=your_development_sentry_client_secret
COOKIE_SECRET=my-super-secret-cookie

Verify

Run the server locally to make it available at http://localhost:5173

pnpm dev

To test the local server, enter http://localhost:5173/mcp into Inspector and hit connect. Once you follow the prompts, you'll be able to "List Tools".

Tests

There are two test suites included: basic unit tests, and some evaluations.

Unit tests can be run using:

pnpm test

Evals will require a .env file with some config:

OPENAI_API_KEY=

Once that's done you can run them using:

pnpm eval