Authentication

Startbutton uses two types of API keys, depending on the endpoint you're calling:

Key type	Used for	Header format
Public key	Collection-type endpoints (Accept Payments, all Server-to-Server Integration methods)	Authorization: Bearer PUBLIC_KEY
Secret key	Payout, wallet, and account-management endpoints (Transfer, Get Wallet Balance, Subscriptions, Re-charge Card)	Authorization: Bearer SECRET_KEY
Content-type		application/json

Each endpoint's reference page states which key type it requires. Both keys are available from Settings → API Keys on your Startbutton dashboard.