# ST Pay Merchant API > ST Pay merchant API integration guide This file is the table of contents. Use llms-full.txt for the full content. ## Contents - [Overview](/en/index.md) - [Callback notifications](/en/api/callback.md) - [Create a collection order](/en/api/collect.md) - [Create a payout order](/en/api/payout.md) - [Order query](/en/api/query.md) - [Merchant back office](/en/guide/backoffice.md) - [Request and response format](/en/guide/conventions.md) - [Authentication and IP whitelist](/en/guide/security.md) - [Signature](/en/guide/signature.md) - [Bank codes](/en/reference/banks.md) - [Go-live checklist](/en/reference/checklist.md) - [Error codes](/en/reference/errors.md) - [Duplicate requests and confirming results](/en/reference/idempotency.md) - [Order status and amounts](/en/reference/status.md)