LIMIT_REACHED

A per-account limit is full.

HTTP status	409
Group	Platform
Retryable	No — sending it again changes nothing

What happened

For example the number of API keys, webhooks or authorised senders the tier allows.

What to do

Remove an existing entry, or move to a tier with a higher limit.

The problem document

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

{
  "type": "https://docs.co-relayer.com/errors/limit-reached",
  "title": "A per-account limit is full.",
  "status": 409,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "LIMIT_REACHED",
  "retryable": false,
  "hint": "Remove an existing entry, or move to a tier with a higher limit."
}

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