> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# MessagesMessageParam - Python SDK

> MessagesMessageParam method reference

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

Anthropic message with OpenRouter extensions

## Fields

| Field     | Type                                                                                                                           | Required             | Description |
| --------- | ------------------------------------------------------------------------------------------------------------------------------ | -------------------- | ----------- |
| `content` | [components.MessagesMessageParamContentUnion5](/client-sdks/python/api-reference/components/messagesmessageparamcontentunion5) | :heavy\_check\_mark: | N/A         |
| `role`    | [components.MessagesMessageParamRole](/client-sdks/python/api-reference/components/messagesmessageparamrole)                   | :heavy\_check\_mark: | N/A         |