---
title: "ObservabilityLangsmithDestinationConfig"
---

## Fields

| Field                                                                                 | Type                                                                                  | Required                                                                              | Description                                                                           |
| ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- |
| `api_key`                                                                             | *str*                                                                                 | :heavy_check_mark:                                                                    | N/A                                                                                   |
| `endpoint`                                                                            | *Optional[str]*                                                                       | :heavy_minus_sign:                                                                    | N/A                                                                                   |
| `headers`                                                                             | Dict[str, *str*]                                                                      | :heavy_minus_sign:                                                                    | Custom HTTP headers to include in requests to this destination.                       |
| `project`                                                                             | *Optional[str]*                                                                       | :heavy_minus_sign:                                                                    | The name for this project, such as pr-openrouter-demo. Defaults to "main" if not set. |
| `workspace_id`                                                                        | *Optional[str]*                                                                       | :heavy_minus_sign:                                                                    | Required for org-scoped API keys. Find this in your LangSmith workspace settings.     |