fee_percent_not_permitted

HTTP 403 · Your key cannot choose its own fee.

What causes it

The request asked for a `fee_percent` other than your published rate, and the key is not permitted to set fees. Separate from `forbidden` so you can tell “my key cannot do this at all” from “drop one field and this call works”.

What to do

Omit `fee_percent` and the agreed rate applies automatically. If you believe your agreement allows a different rate, that is a commercial change and not something a key can assert.

Retry?

No — the same request produces the same answer.

The response

{
  "type": "https://developers.vaki.co/errors/fee_percent_not_permitted",
  "title": "…",
  "status": 403,
  "code": "fee_percent_not_permitted",
  "detail": "…",
  "instance": "/v1/checkout_links"
}

Branch on code, never on title or detail. The full list of codes, and the shape of the problem document, is on Errors.