Errors
Error response format, HTTP status codes, and validation error structure.
The Core API returns errors as JSON with a consistent shape. The code field is the HTTP status, repeated in the body for clients that don’t have easy access to the response status code.
Common error responses
{ "code": 401, "message": "Unauthorized" }
{ "code": 404, "message": "Not found" }
{
"code": 422,
"message": "Validation Error",
"errors": [
{ "field": "start", "location": "body", "messages": ["is required"] }
]
}
Validation errors (422)
Validation failures return 422 with an errors array. Each entry has:
field— the offending parameter namelocation—body,query, orparamsmessages— array of human-readable validation messages; a single field can fail multiple rules at once
What about the Metrics API?
WebSocket errors are returned as JSON within the standard response frame format (see Metrics API overview). The shape mirrors the REST error format above — a code and a message, optionally an errors array for validation failures.