# Paymee Developers

> Integrate the Paymee payment gateway: hosted checkout, signed webhooks, refunds, and idempotent REST writes.

Full text of every page concatenated for LLMs: https://docs.paymee.online/llms-full.txt

## Docs

- [Quickstart](https://docs.paymee.online/guides/quickstart/): Create your first payment session and redirect a buyer to checkout in under 10 minutes.
- [Authentication](https://docs.paymee.online/guides/authentication/): Authenticate API requests with your secret key, and understand the two credentials Paymee issues.
- [Hosted checkout flow](https://docs.paymee.online/guides/hosted-checkout/): The full create-session, redirect, and result lifecycle for accepting a payment.
- [Webhooks](https://docs.paymee.online/guides/webhooks/): Receive payment events and verify their signature with your webhook secret.
- [Idempotency](https://docs.paymee.online/guides/idempotency/): Safely retry session creation without creating duplicate payments.
- [Refunds](https://docs.paymee.online/guides/refunds/): Issue full or partial refunds against a succeeded payment session.
- [Testing & sandbox](https://docs.paymee.online/guides/testing/): Build against the sandbox with test cards before going live.
- [Amounts & currency](https://docs.paymee.online/guides/amounts-and-currency/): Requested vs charged amounts, TND precision, and how foreign-currency requests are converted at your configured exchange rate.
- [Errors](https://docs.paymee.online/guides/errors/): Paymee returns structured RFC 9457 problem documents with a stable error type catalog.
- [Versioning & deprecation](https://docs.paymee.online/guides/versioning/): How the gateway API is versioned and how breaking changes are communicated.
- [Going live](https://docs.paymee.online/guides/going-live/): The checklist to move from sandbox to production safely.

## API reference

- [Merchant API reference](https://docs.paymee.online/reference/): full REST endpoint reference, generated from the OpenAPI spec.