# sandbox_key_required

> Server Tickwire-Sandbox is only for sandbox keys; sandbox and live never mix.

Source: https://tickwire.io/docs/errors/sandbox_key_required/

HTTP 400. Nothing reached the broker.

**Likely cause:** Creating an account on server Tickwire-Sandbox with a live key.

**What to do:** Get a twsk_ key with POST /v1/sandbox/keys (or /v1/sandbox/signup) and use it.

**Retry:** No. The same request gets the same answer; change something first.

Listed under [Sandbox](https://tickwire.io/docs/errors/#sandbox) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.