initialize returns an error

init-error · Protocol negotiation

Endpoint (Streamable HTTP)

https://chaos-mcp.thomascdnns.com/s/init-error/mcp

On the wire — recorded from a real request

Symptom

what you'll observe

Handshake fails immediately with a JSON-RPC error; nothing else is reachable.

Cause

what this reproduces

A dependency the server needs at startup (DB, secret) is missing, so initialize throws.

Fix

how you'd resolve it

Make initialize cheap and dependency-free; defer heavy setup to first real use.

Try it with curl

bash

curl -sS -X POST \
  https://chaos-mcp.thomascdnns.com/s/init-error/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "initialize",
    "params": {
      "protocolVersion": "2024-11-05",
      "capabilities": {},
      "clientInfo": {"name": "curl", "version": "1"}
    }
  }'