> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ozura.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API Reference

> Complete API reference for Ozura's payment and vault services.

Vault endpoint reference is available in the **Vault** section below. Checkout and OzuraPay API reference coming soon.

## Base URLs

| Service      | Sandbox                                                      | Production                       |
| ------------ | ------------------------------------------------------------ | -------------------------------- |
| OzuraPay API | `https://sandbox.payapi.v2.ozurapay.com`                     | `https://payapi.v2.ozurapay.com` |
| Checkout     | `https://sandbox-checkout.ozura.com`                         | `https://checkout.ozura.com`     |
| Vault        | `https://api.ozuravault.com` (sandbox uses a test vault key) | `https://api.ozuravault.com`     |

<Note>
  Vault is a single environment — the same host serves test and production traffic, and the key (test vs. prod) determines which mode you're in. OzuraPay, by contrast, has fully separate **sandbox** and **production** environments at different hosts. See [Sandbox](/guides/sandbox) for the full setup.
</Note>

## Authentication

All API requests require authentication via API key or JWT token. See [Vault → Authentication](/api-reference/vault/authentication) for details.

## Vault API

For Vault endpoint details (tokenize, proxy, verify API key, status codes, common errors), see **[Vault](/api-reference/vault/overview)** in the sidebar.