Coinbase Commerce API key is not configured
Coinbase Commerce (Business) API call refused because the API key setting is empty.
Why this happens
Checkout may be toggled on without pasting the key from Coinbase Commerce → Settings → API keys. Sibling of broader “Commerce is not configured” messages.
Diagnose and fix
1. Admin → Settings → Payment — paste the Coinbase Commerce API key; save.
2. Enable Coinbase Commerce checkout; configure webhook secret if required.
3. Retry crypto checkout; see Coinbase Business for full setup.
4. Distinct from “did not return a hosted checkout URL” (key present, bad response).