> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# SendChatCompletionRequestRequest - Python SDK

> SendChatCompletionRequestRequest method reference

<Warning>
  The Python SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues).
</Warning>

## Fields

| Field                                 | Type                                                                               | Required             | Description                                                                                                                                                 | Example                                                                                                                                                                                                                                  |
| ------------------------------------- | ---------------------------------------------------------------------------------- | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `http_referer`                        | *Optional\[str]*                                                                   | :heavy\_minus\_sign: | The app identifier should be your app's URL and is used as the primary identifier for rankings.<br />This is used to track API usage per application.<br /> |                                                                                                                                                                                                                                          |
| `x_open_router_title`                 | *Optional\[str]*                                                                   | :heavy\_minus\_sign: | The app display name allows you to customize how your app appears in OpenRouter's dashboard.<br />                                                          |                                                                                                                                                                                                                                          |
| `x_open_router_categories`            | *Optional\[str]*                                                                   | :heavy\_minus\_sign: | Comma-separated list of app categories (e.g. "cli-agent,cloud-agent"). Used for marketplace rankings.<br />                                                 |                                                                                                                                                                                                                                          |
| `x_open_router_experimental_metadata` | [Optional\[components.MetadataLevel\]](../components/metadatalevel.md)             | :heavy\_minus\_sign: | Opt-in to surface routing metadata on the response under `openrouter_metadata`. Defaults to `disabled`.                                                     | enabled                                                                                                                                                                                                                                  |
| `chat_request`                        | [components.ChatRequest](/client-sdks/python/api-reference/components/chatrequest) | :heavy\_check\_mark: | N/A                                                                                                                                                         | `{"max_tokens": 150,"messages": [{"content": "You are a helpful assistant.","role": "system"}`,<br />`{"content": "What is the capital of France?","role": "user"}`<br />],<br />"model": "openai/gpt-4",<br />"temperature": 0.7<br />} |