Testing & sandbox

Sandbox is a full copy of the API where nothing real moves. Build and test the entire flow before go-live.

What you get

• Instant test credentials (pk_test_… / sk_test_…) and a sandbox collection shortcode.

• Seeded test customer wallets (MSISDNs shown in the portal) to act as payers.

• An API Console to fire real sandbox requests, and a C2B simulator.

Scenarios to cover

• Happy path: Express → completed → webhook received and verified.

• Customer declines / lets the prompt expire — handle declined / expired.

• Duplicate request with the same idem — confirm you get one charge.

• C2B validate (accept and reject) and confirmation handling.

• Webhook signature failure — confirm you reject it.

• Limit breach — send above the per-transaction cap and handle limit_exceeded.