> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crewpass.co.uk/llms.txt
> Use this file to discover all available pages before exploring further.

# partner_mode_mismatch (403)

> A test-mode key was used against a live environment.

Returned when a `cpk_test_*` key is used against an environment that only accepts
live keys (or vice-versa).

```json theme={null}
{ "error": { "code": "partner_mode_mismatch", "message": "test-mode keys are not accepted on this environment" } }
```

**Fix** — use your `cpk_live_*` key against production
(`partners.crewpass.co.uk`) and your `cpk_test_*` key against the sandbox.