MALFORMED_REQUEST

The request body did not match the schema of the endpoint.

HTTP status	400
Group	Relay path
Retryable	No — sending it again changes nothing
Re-sign	NONE — do not ask the user to sign anything

What happened

A required field is missing, a field has the wrong JSON type, or a value is outside the range the schema allows.

What to do

Read details.field, fix the request and send it again. Validate against /openapi.yaml before retrying in a loop.

Extra members

This code carries field in the problem document, on top of the common members.

The problem document

Every error is application/problem+json (RFC 9457) with the same shape:

{
  "type": "https://docs.co-relayer.com/errors/malformed-request",
  "title": "The request body did not match the schema of the endpoint.",
  "status": 400,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "MALFORMED_REQUEST",
  "retryable": false,
  "resign": "NONE",
  "hint": "Read `details.field`, fix the request and send it again. Validate against `/openapi.yaml` before retrying in a loop."
}

See the error model for what each member means and how to handle unknown codes.