The console opens, but the key does not work with the platform
Check that the console started inplatform mode and points at the same local API origin you call with curl. The default console mode is a deterministic mock. A key created there is useful for exploring the interface, but it is not a platform credential.
The connection is refused
Confirm the platform process is running on port 4100.GET /healthz checks process liveness; GET /readyz also checks repository connectivity. Neither endpoint confirms that a payment capability is released.
whoami returns an authentication error
Check that GOL_API_KEY contains the secret revealed when the test key was created. A key hint or key ID is not a credential. Confirm there is exactly one Bearer prefix in the header and that you have not revoked the key.