TOO_MANY_IN_FLIGHT

This sender has as many unsettled intents as it may have at once.

HTTP status	429
Group	Relay path
Retryable	Yes — the same request may be sent again
Re-sign	NONE — do not ask the user to sign anything

What happened

The in-flight limit keeps one account from occupying the relayer fleet.

What to do

Wait for an intent to reach a terminal state, then send the next one.

The problem document

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

{
  "type": "https://docs.co-relayer.com/errors/too-many-in-flight",
  "title": "This sender has as many unsettled intents as it may have at once.",
  "status": 429,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "TOO_MANY_IN_FLIGHT",
  "retryable": true,
  "resign": "NONE",
  "hint": "Wait for an intent to reach a terminal state, then send the next one."
}

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