# AllScale Open API

> Third-party integration documentation for the AllScale Open API — checkout, claim links, and webhooks.

- [AllScale Open API](https://developer.allscale.io/index.md): Accept stablecoin payments and send payouts through the AllScale Open API.
- [Checkout Payment Flow](https://developer.allscale.io/checkout/payment-flow.md): End-to-end sequence from the buyer tapping checkout to the merchant receiving the webhook.
- [Postman Collection](https://developer.allscale.io/postman/quickstart.md): Import the ready-to-run Postman collection with a built-in HMAC request signer.
- [AllScale_OpenAPI_Production.postman_environment.json](https://developer.allscale.io/postman/env.md)
- [AllScale_OpenAPI.postman_collection.json](https://developer.allscale.io/postman/collection.md)
- [Authentication & Request Signing](https://developer.allscale.io/api-reference/authentication.md): HMAC-SHA256 request signing, required headers, canonical string format, and error codes.
- [Optional Response Signing](https://developer.allscale.io/api-reference/response-signing.md): Verify that API responses genuinely originate from AllScale.
- [Test Routes](https://developer.allscale.io/api-reference/test-routes.md): Ping and echo endpoints for validating your credentials, clock skew, and body hashing.
- [Create Checkout Intent](https://developer.allscale.io/api-reference/checkout-intents/create.md): Create a checkout intent and receive the hosted checkout URL to redirect your buyer to.
- [Get Checkout Intent](https://developer.allscale.io/api-reference/checkout-intents/get.md): Retrieve the full detail of a previously created checkout intent.
- [Get Checkout Intent Status](https://developer.allscale.io/api-reference/checkout-intents/get-status.md): Poll the lightweight status endpoint for a checkout intent.
- [Create Auto-Payout](https://developer.allscale.io/api-reference/claim-links/create-auto-payout.md): Send funds to a recipient through an AllScale claim link.
- [Cancel Auto-Payout](https://developer.allscale.io/api-reference/claim-links/cancel-auto-payout.md): Claim back an unclaimed auto-payout and return the funds to your balance.
- [Checkout Webhook](https://developer.allscale.io/webhooks/checkout-webhook.md): Webhook payload schema, signature verification, retry behaviour, and idempotency.
- [Claim Link Webhook](https://developer.allscale.io/webhooks/claim-link-webhook.md): Events emitted over the lifetime of a claim link, and how to verify them.