Six places to look, and each one opens something real. There is no reading list here that leads back to a marketing page: if a card promises a checklist or a calculator, that is what the link gives you.
Build the Integration
API Reference
The endpoints themselves: how an order is created, what a signed request looks like, and the shape of the result callback your server has to accept.
- Order Creation Endpoint
- Request Signing
- Callback Payload and Signature
- Order Status Values
Sandbox and Go-Live Checklist
What to verify before your first real order: sandbox payments end to end, callback delivery to your own endpoint, and the order states your code has to handle.
- Sandbox Test Payments
- Callback Delivery Check
- Order State Handling
- Common Integration Mistakes
Callback Security
The two controls that stop a forged payment notification: verifying the signature on every callback, and testing your endpoint before you trust it.
- Signed Callback Verification
- Callback Endpoint Testing
- Firewall and CDN Allowlisting
- Manual Webhook Resend
Run It Day to Day
Error and Troubleshooting Guide
The errors merchants actually hit, by their literal text: wrong signature, abnormal amount, a callback that never arrived, a 404 after redirect.
- Signature and Credential Errors
- Callback Not Received
- Redirect and 404 Problems
- In-App Browser Limitations
Complaints and Account Health
What each wallet expects when a buyer complains, the deadlines that apply, and the inactivity rule that closes a dormant channel.
- Complaint Resolution Standards
- Reply and Completion Deadlines
- Evidence for Bad-Faith Complaints
- Keeping a Channel Active
Fee Calculator
In the merchant dashboard: preview what a deposit, withdrawal or currency exchange costs before you commit to it, at your own account's rates.
- Deposit Fee Preview
- Withdrawal Fee Preview
- Exchange Rate Preview
- Per-Account Rate Summary