> ## 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.

# AnthropicTextBlockParam - Python SDK

> AnthropicTextBlockParam 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                 |
| --------------- | ------------------------------------------------------------------------------------------------------------------ | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------- |
| `cache_control` | [Optional\[components.AnthropicCacheControlDirective\]](../components/anthropiccachecontroldirective.md)           | :heavy\_minus\_sign: | Enable automatic prompt caching. When set at the top level, the system automatically applies cache breakpoints to the last cacheable block in the request. Currently supported for Anthropic Claude models. | `{"type": "ephemeral"}` |
| `citations`     | List\[[components.Citation](/client-sdks/python/api-reference/components/citation)]                                | :heavy\_minus\_sign: | N/A                                                                                                                                                                                                         |                         |
| `text`          | *str*                                                                                                              | :heavy\_check\_mark: | N/A                                                                                                                                                                                                         |                         |
| `type`          | [components.AnthropicTextBlockParamType](/client-sdks/python/api-reference/components/anthropictextblockparamtype) | :heavy\_check\_mark: | N/A                                                                                                                                                                                                         |                         |