Errors

Error shape

{
  "error": {
    "code": "quote_expired",
    "message": "The selected quote has expired.",
    "request_id": "req_01JEXAMPLE"
  }
}

Code	Action
`authentication_failed`	Check key and environment.
`idempotency_conflict`	Reuse the original payload or send a new key.
`quote_expired`	Create a fresh quote.
`insufficient_liquidity`	Retry later or request corridor limit changes.
`compliance_review_required`	Wait for Sentra review completion.
`destination_unavailable`	Ask for a supported destination.

Retry network failures and 5xx responses with exponential backoff. Do not retry compliance rejections without correcting the underlying data.