FastAPI and Python error tracking your coding agent can read

The Runheed Python SDK reports exceptions with the traceback and breadcrumbs. For FastAPI, one middleware records the request and every exception that escapes a route. Your agent reads them over MCP from Claude Code, Cursor or any MCP client.

Set it up

1. 1.Install the SDK.

   terminalbash

   pip install https://runheed.com/dl/runheed-0.1.0-py3-none-any.whl

   [COPY]

2. 2.Initialize it and add the middleware.

   main.pypython

   import os
   import runheed
   from fastapi import FastAPI
   from runheed import FastAPIIntegration
   
   runheed.init(dsn=os.environ["RUNHEED_DSN"], environment="production")
   
   app = FastAPI()
   integration = FastAPIIntegration()
   integration.setup(runheed.get_client())
   app.add_middleware(integration.create_middleware())

   [COPY]

3. 3.Connect your agent.

   terminalbash

   claude mcp add runheed -e RUNHEED_API_KEY=al_... -- npx -y https://runheed.com/dl/runheed-mcp-0.1.0.tgz

   [COPY]

The npm and PyPI releases are not out yet, so these commands install the same package files straight from runheed.com. Nothing else changes when the registry versions ship.

Then ask your agent

> what broke in production since the last deploy? fix the top one and resolve it with the commit hash

Common Python and FastAPI errors

• ModuleNotFoundError: No module named 'x'
• TypeError: 'NoneType' object is not subscriptable
• UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte