Authentication

Create an active Secret Key in Developer settings. Keep it on your server; never embed it in browser or mobile code.

Authorization: Token YOUR_SECRET_KEY
Accept: application/json
Content-Type: application/json

Bearer authentication is also supported. Airtime and summaries are scoped to the account owning this key.

Saved vending method

Open Developer settings → Default vending method, choose Wallet or SIM and save. Data and airtime API calls without vending_type use this preference. An explicit vending_type overrides the saved choice. Existing accounts keep legacy behavior until a preference is saved.