> For the complete documentation index, see [llms.txt](https://startbutton.gitbook.io/startbutton-product-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://startbutton.gitbook.io/startbutton-product-api/collections.md).

# Collections

- [Accept Payments — Overview](https://startbutton.gitbook.io/startbutton-product-api/collections/accept-payments-overview.md)
- [Restricting Payment Methods](https://startbutton.gitbook.io/startbutton-product-api/collections/accept-payments-overview/restricting-payment-methods.md)
- [Redirect URL Behavior](https://startbutton.gitbook.io/startbutton-product-api/collections/redirect-url-behavior.md)
- [Custom Webhook Per Transaction](https://startbutton.gitbook.io/startbutton-product-api/collections/custom-webhook-per-transaction.md)
- [Supported Currencies & Methods](https://startbutton.gitbook.io/startbutton-product-api/collections/supported-currencies-and-methods.md)
- [Server-to-Server Integration — Overview](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview.md)
- [S2S — Cards](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview/s2s-cards.md)
- [S2S — Virtual Accounts](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview/s2s-virtual-accounts.md)
- [S2S — EFT](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview/s2s-eft.md)
- [S2S — Mobile Money](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview/s2s-mobile-money.md)
- [OTP Verify](https://startbutton.gitbook.io/startbutton-product-api/collections/server-to-server-integration-overview/s2s-mobile-money/otp-verify.md)
- [Recharge Card](https://startbutton.gitbook.io/startbutton-product-api/collections/recharge-card.md)
- [Subscriptions](https://startbutton.gitbook.io/startbutton-product-api/collections/subscriptions.md)
- [Payment Links](https://startbutton.gitbook.io/startbutton-product-api/collections/payment-links.md)
- [Transaction Statuses](https://startbutton.gitbook.io/startbutton-product-api/collections/transaction-statuses.md)
- [Under & Overpayments](https://startbutton.gitbook.io/startbutton-product-api/collections/under-and-overpayments.md)