NO_RELAYER_AVAILABLE

No healthy relayer can be assigned in that shard right now.

HTTP status	503
Group	Relay path
Retryable	Yes — the same request may be sent again
Re-sign	SAME_BYTES — resend the transaction you already have, byte for byte

What happened

Every eligible relayer is momentarily out of headroom or window budget. This is never answered with a re-sign: the relayer is not lost, only busy.

What to do

Retry shortly. If you already hold a signed transaction, resend the same bytes.

The problem document

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

{
  "type": "https://docs.co-relayer.com/errors/no-relayer-available",
  "title": "No healthy relayer can be assigned in that shard right now.",
  "status": 503,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "NO_RELAYER_AVAILABLE",
  "retryable": true,
  "resign": "SAME_BYTES",
  "hint": "Retry shortly. If you already hold a signed transaction, resend the same bytes."
}

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