Developer platform
Payments, messaging, identity verification, bill payments and more. One key, one wallet and one dashboard, with automatic failover where it matters.
Test mode is free. No card needed to start.
curl -X POST https://api.stackapi.app/v1/notifications/sms \
-H "X-API-Key: Psk-test-YOUR_SECRET_KEY" \
-H "X-Public-Key: Ppk-test-YOUR_PUBLIC_KEY" \
-H "Content-Type: application/json" \
-d '{"to": "+2348012345678", "message": "Your code is 482910"}'Each API works on its own, and they all share the same authentication, wallet, logs and webhooks.
Send SMS and email from one API, with automatic failover.
Accept card, bank transfer and USSD payments in naira.
Accept cards in major currencies and settle to your wallet.
Verify BVN, NIN and phone numbers against official records.
Airtime, data bundles, electricity and cable TV.
Generate branded business reports and exports from your data.
Score a transaction for risk before you accept it.
Hold funds between two parties and release on delivery.
Sign up as an individual or as an organization. Both can invite teammates, and everyone shares one wallet.
Test keys run in a sandbox. Nothing is sent and nothing is charged, so you can build and test freely.
Verify your account, create live keys and switch the key in your code. Same endpoints, real results.
Work solo, or invite your team into a personal or organization workspace.
Owner, admin, member and viewer. Each role sees and changes only what it should.
Your team spends from the workspace wallet, so billing stays in one place.
Give a teammate or a service a key limited to the APIs and request rate it needs.
Events arrive signed, with automatic retries and a delivery log you can inspect.
More APIs are on the way. Anything marked Soon is not available yet.
Send money to bank accounts from your own balance.
Verify company registration and directors (KYB).
Confirm that a customer's address is real.
Live and historical exchange rates for major currencies.
Bank lists, account name lookup and other reference data.
Issue virtual cards for spending and subscriptions.
Calculate and validate taxes at checkout.
Create shipments and track deliveries.
Create a workspace, make your first request in minutes, and go live when you are ready.
Create your workspace