Unsupported API version

What happened

That API version isn't supported. Nothing was done.

Can you retry?

Don't retry. Don't repeat this request. Fix what the response describes, or stop and report it. retry: never

Who acts

You: the software that sent the request. who_acts: caller

Don't

• Don't send the same request again unchanged; it will be refused the same way. repeat_unchanged

Example response

Sent as application/problem+json. The detail describes the particular request; keep request_id for support.

{
  "type": "https://docs.perionpayments.com/problems/unsupported-api-version",
  "title": "Unsupported API version",
  "status": 400,
  "code": "unsupported_api_version",
  "detail": "That API version isn't supported. Nothing was done.",
  "request_id": "req_8YkQ2rL0ZtW4",
  "retryable": false,
  "retry": "never",
  "who_acts": "caller",
  "next_step": "Send Perion-Version 2026-07-15, or leave the header out.",
  "do_not": [
    "repeat_unchanged"
  ]
}