# Atla MCP Server

> [!CAUTION]
> This repository was archived on July 21, 2025. The Atla API is no longer active.

An MCP server implementation providing a standardized interface for LLMs to interact with the Atla API for state-of-the-art LLMJ evaluation.

> Learn more about Atla [here](https://docs.atla-ai.com). Learn more about the Model Context Protocol [here](https://modelcontextprotocol.io).

<a href="https://glama.ai/mcp/servers/@atla-ai/atla-mcp-server">
  <img width="380" height="200" src="https://glama.ai/mcp/servers/@atla-ai/atla-mcp-server/badge" alt="Atla MCP server" />
</a>

## Available Tools

- `evaluate_llm_response`: Evaluate an LLM's response to a prompt using a given evaluation criteria. This function uses an Atla evaluation model under the hood to return a dictionary containing a score for the model's response and a textual critique containing feedback on the model's response.
- `evaluate_llm_response_on_multiple_criteria`: Evaluate an LLM's response to a prompt across _multiple_ evaluation criteria. This function uses an Atla evaluation model under the hood to return a list of dictionaries, each containing an evaluation score and critique for a given criteria.

## Usage

> To use the MCP server, you will need an Atla API key. You can find your existing API key [here](https://www.atla-ai.com/sign-in) or create a new one [here](https://www.atla-ai.com/sign-up).

### Installation

> We recommend using `uv` to manage the Python environment. See [here](https://docs.astral.sh/uv/getting-started/installation/) for installation instructions.

### Manually running the server

Once you have `uv` installed and have your Atla API key, you can manually run the MCP server using `uvx` (which is provided by `uv`):

```bash
ATLA_API_KEY=<your-api-key> uvx atla-mcp-server
```

### Connecting to the server

> Having issues or need help connecting to another client? Feel free to open an issue or [contact us](mailto:support@atla-ai.com)!

#### OpenAI Agents SDK

> For more details on using the OpenAI Agents SDK with MCP servers, refer to the [official documentation](https://openai.github.io/openai-agents-python/).

1. Install the OpenAI Agents SDK:

```shell
pip install openai-agents
```

2. Use the OpenAI Agents SDK to connect to the server:

```python
import os

from agents import Agent
from agents.mcp import MCPServerStdio

async with MCPServerStdio(
        params={
            "command": "uvx",
            "args": ["atla-mcp-server"],
            "env": {"ATLA_API_KEY": os.environ.get("ATLA_API_KEY")}
        }
    ) as atla_mcp_server:
    ...
```

#### Claude Desktop

> For more details on configuring MCP servers in Claude Desktop, refer to the [official MCP quickstart guide](https://modelcontextprotocol.io/quickstart/user).

1. Add the following to your `claude_desktop_config.json` file:

```json
{
  "mcpServers": {
    "atla-mcp-server": {
      "command": "uvx",
      "args": ["atla-mcp-server"],
      "env": {
        "ATLA_API_KEY": "<your-atla-api-key>"
      }
    }
  }
}
```

2. **Restart Claude Desktop** to apply the changes.

You should now see options from `atla-mcp-server` in the list of available MCP tools.

#### Cursor

> For more details on configuring MCP servers in Cursor, refer to the [official documentation](https://docs.cursor.com/context/model-context-protocol).

1. Add the following to your `.cursor/mcp.json` file:

```json
{
  "mcpServers": {
    "atla-mcp-server": {
      "command": "uvx",
      "args": ["atla-mcp-server"],
      "env": {
        "ATLA_API_KEY": "<your-atla-api-key>"
      }
    }
  }
}
```

You should now see `atla-mcp-server` in the list of available MCP servers.

## Contributing

Contributions are welcome! Please see the [CONTRIBUTING.md](CONTRIBUTING.md) file for details.

## License

This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for details.