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Atla

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by atla-ai
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Python
MIT License
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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 The Atla API is no longer active.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. Learn more about the Model Context Protocol here.

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 or create a new one here.

Installation

We recommend using uv to manage the Python environment. See here 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):

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!

OpenAI Agents SDK

For more details on using the OpenAI Agents SDK with MCP servers, refer to the official documentation.

  1. Install the OpenAI Agents SDK:
pip install openai-agents
  1. Use the OpenAI Agents SDK to connect to the server:
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.

  1. Add the following to your claude_desktop_config.json file:
{ "mcpServers": { "atla-mcp-server": { "command": "uvx", "args": ["atla-mcp-server"], "env": { "ATLA_API_KEY": "<your-atla-api-key>" } } } }
  1. 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.

  1. Add the following to your .cursor/mcp.json file:
{ "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 file for details.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Install Server
A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

The Atla MCP Server provides a standardized interface for LLMs to interact with the Atla API for state-of-the-art LLMJ evaluation.

  1. Available Tools
    1. Usage
      1. Installation
      2. Manually running the server
      3. Connecting to the server
    2. Contributing
      1. License

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