> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://openrouter.ai/docs/llms.txt.
> For full documentation content, see https://openrouter.ai/docs/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://openrouter.ai/docs/_mcp/server.

# MessagesOutputConfigFormat - Python SDK

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

A schema to specify Claude's output format in responses. See [structured outputs](https://platform.claude.com/docs/en/build-with-claude/structured-outputs).

## Fields

| Field     | Type                                                                                                                 | Required             | Description |
| --------- | -------------------------------------------------------------------------------------------------------------------- | -------------------- | ----------- |
| `schema_` | Dict\[str, *Nullable\[Any]*]                                                                                         | :heavy\_check\_mark: | N/A         |
| `type`    | [components.MessagesOutputConfigTypeJSONSchema](/docs/sdks/components/components/messagesoutputconfigtypejsonschema) | :heavy\_check\_mark: | N/A         |