generated: '2026-07-17' method: documented source: https://docs.fazz.com/docs/authentication summary: types: - http schemes: - name: basic_auth type: http scheme: basic sources: - https://docs.fazz.com/docs/authentication notes: >- HTTP Basic authentication. Provide your API key as the Basic auth username and your secret key as the password (base64(api_key:secret_key)) in the Authorization header. Live keys start with `live_`; sandbox keys start with `test_`. All requests must be made over HTTPS. Keys are generated on the Developer Tools page of the Fazz Business dashboard; the secret key is shown only once. example: 'curl https://www.xfers.io/api/v4/payments -u API_KEY:SECRET_KEY'