# Resurs Docs

> Documentation for Resurs payment solutions and APIs.

## Docs

- [CORS preflight](https://docs.resurs.com/api-reference/payment-methods/cors-preflight.md)
- [Retrieve Payment Method Groups](https://docs.resurs.com/api-reference/payment-methods/retrieve-payment-method-groups.md): Retrieves payment method groups. Each group contains public display fields (title, subtitle, type, customerTypes) for building payment method selectors, and an opaque internalData blob for Resurs web components.
- [CORS preflight](https://docs.resurs.com/api-reference/sessions/cors-preflight.md)
- [Create Session](https://docs.resurs.com/api-reference/sessions/create-session.md): Creates a secure session for payment method integration. This endpoint is intended for merchant backends to generate sessions that can be safely used by payment method components in web applications. The session ID provides secure access to payment methods without exposing sensitive merchant credent…
- [Introduction](https://docs.resurs.com/changelog/index.md): Stay informed about the latest updates, improvements, and changes to our platform
- [Payment Methods](https://docs.resurs.com/developer-guide/checkout/payment-methods.md): End-to-end guide for integrating Resurs Payment Methods into your checkout flow.
- [Introduction](https://docs.resurs.com/developer-guide/introduction.md): Integrate Resurs payment solutions into your checkout flow

## OpenAPI Specs

- [openapi](https://docs.resurs.com/api/payment-widget/openapi.json)
- [stores_v2_openapi](https://docs.resurs.com/api/merchant-api/v2/stores_v2_openapi.json)
- [oauth_openapi](https://docs.resurs.com/api/merchant-api/v2/oauth_openapi.json)