IDEMPOTENCY_KEY_MISMATCH

HTTP status	Retryable
`409`	No

What happened

The Idempotency-Key header and the body idempotency_key field are both present and have different values.

How to fix it

Send the key in one place, or make both values identical.

Example response

An illustrative example. The message wording and the contents of details vary; branch on error.code.

{
  "status": "error",
  "error": {
    "code": "IDEMPOTENCY_KEY_MISMATCH",
    "message": "Idempotency keys disagree",
    "type": "idempotency",
    "http_status": 409,
    "retryable": false,
    "doc_url": "https://docs.blujay.io/errors/idempotency-key-mismatch",
    "details": []
  },
  "trace_id": "trc_8f2a1c0e4b7d",
  "timestamp": "2026-10-14T17:30:48.000Z"
}

Still stuck?

Email support@blujay.io with the trace_id from the error response. See Errors for the response format.

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IDEMPOTENCY_KEY_MISMATCH

What happened

How to fix it

Example response

Still stuck?

​What happened

​How to fix it

​Example response

​Still stuck?

What happened

How to fix it

Example response

Still stuck?