> This page is for version v1.
> For other versions, use one of these documentation indexes:
> - v2 (default): https://developers.clearpay.co.uk/v-2/llms.txt
> - v1: https://developers.clearpay.co.uk/v-1/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.clearpay.co.uk/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.clearpay.co.uk/_mcp/server.

# Request Headers

Clients must send appropriate headers with all requests.

## HTTP Headers

| Field Name    | Requirement   | Description                                                                        |
| :------------ | :------------ | :--------------------------------------------------------------------------------- |
| Authorization | `required`    | See [Authentication](/authentication).                                             |
| Content-Type  | `required`    | All `POST` and `PUT` requests must declare the content-type as `application/json`. |
| User-Agent    | `required`    | See [User-Agent Header](/user-agent-header).                                       |
| Accept        | `recommended` | All requests must accept `application/json` or `*/*`.                              |