> ## 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.

# UnprocessableEntityResponseError - Go SDK

> UnprocessableEntityResponseError type definition

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

Unprocessable Entity - Semantic validation failure

## Fields

| Field                | Type                                                                                                                         | Required             | Description                                | Example                                       |
| -------------------- | ---------------------------------------------------------------------------------------------------------------------------- | -------------------- | ------------------------------------------ | --------------------------------------------- |
| `Error`              | [components.UnprocessableEntityResponseErrorData](/client-sdks/go/api-reference/models/unprocessableentityresponseerrordata) | :heavy\_check\_mark: | Error data for UnprocessableEntityResponse | `{"code": 422,"message": "Invalid argument"}` |
| `OpenrouterMetadata` | map\[string]`any`                                                                                                            | :heavy\_minus\_sign: | N/A                                        |                                               |
| `UserID`             | `*string`                                                                                                                    | :heavy\_minus\_sign: | N/A                                        |                                               |