Errors

REST

Error responses typically look like:

{
  "error": "Unauthorized"
}

Status	Meaning
`400`	Validation failed (missing/invalid domain, body, etc.)
`401`	Missing/invalid API key or internal auth
`404`	Unknown route or resource
`429`	Rate limited — back off and retry
`5xx`	Unexpected server error

MCP errors use JSON-RPC envelopes, for example:

{
  "jsonrpc": "2.0",
  "error": { "code": -32001, "message": "Unauthorized" },
  "id": null
}

Method-not-allowed (GET/DELETE on /mcp) returns 405 with Allow: POST.