> ## 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.

# Metadata - Python SDK

> Metadata 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 |
| ------------------ | ------- | -------------------- | ----------- |
| `chain_id`         | *float* | :heavy\_check\_mark: | N/A         |
| `contract_address` | *str*   | :heavy\_check\_mark: | N/A         |
| `sender`           | *str*   | :heavy\_check\_mark: | N/A         |