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Authentication

https://api.nuez.app/v1

Include your API key as a Bearer token in every request:

Terminal window
curl https://api.nuez.app/v1/balance \
-H "Authorization: Bearer nz_sk_live_YOUR_KEY_HERE"
PrefixEnvironment
nz_sk_live_...Production — real money moves
nz_sk_test_...Sandbox — no real money

Use nz_sk_test_... during development. The sandbox behaves identically to production, including the approval flow (WhatsApp messages are sent to a test number, not your real phone).

StatusCodeMeaning
401unauthorizedMissing or invalid API key
403scope_deniedKey exists but lacks the required scope