Developers · APIA simple REST API
A simple REST API
for carts and payments.
Build your own store or tools on top of Unlimited. Authenticate with your secret key, test in test mode, go live when ready.
curl https://app.unlimitedprocessing.com/v1/carts \
-H "Authorization: Bearer sk_test_…" \
-d '{ "items": [{ "name": "Hoodie", "amount": 6900, "quantity": 1 }],
"currency": "USD" }'
→ { "id": "cart_…", "checkout_url": "https://pay.yourstore.com/c/…" }MODES2test and live keys
AUTH1secret key per mode
FORMATJSONrequests and responses
Test and liveSeparate keys for test and live mode.
CartsCreate a cart from your own site and send the buyer to your checkout.
PaymentsList and read payments, refund or void them.
DisputesRecord disputes coming from your own sources.
| Method | Endpoint | What it does |
|---|---|---|
GET | /v1/ping | Check your key |
POST | /v1/carts | Create a cart and get its checkout link |
GET | /v1/carts/:id | Read a cart |
GET | /v1/payments | List payments |
GET | /v1/payments/:id | Read a payment |
POST | /v1/payments/:id/refunds | Refund a payment |
POST | /v1/payments/:id/void | Void a payment |
POST | /v1/disputes | Record a dispute |
The full documentation, with every field, is in your back office under Help & support → API documentation.
Questions merchants ask
Where is the full documentation?
In your back office, under Help & support → API documentation.
Can I test without real payments?
Yes, with your test key.