Hey HN,

OpenAI released the Agents SDK yesterday, which is great because of its simplicity. I just added MCP support for it, which is currently available as a fork here: https://github.com/lastmile-ai/openai-agents-mcp (and on pypi as the openai-agents-mcp package).

You can specify the names of MCP servers to give an Agent access to by setting its `mcp_servers` property.

The Agent will then automatically aggregate tools from the MCP servers, as well as any `tools` specified, and create a single extended list of tools. This means you can seamlessly use MCP servers, local tools, OpenAI-hosted tools, and other kinds of Agent SDK tools through a single unified syntax -- and have them interact in the same Agent run loop!

Everything else stays exactly the same.

```

agent = Agent( name="MCP Assistant",

    instructions="You are a helpful assistant with access to MCP tools.",

    tools=[your_other_tools], # Regular tool use for Agent SDK

    mcp_servers=["fetch", "filesystem"]  # Names of MCP servers from your config file (see below)

)

```

The servers are configured in an `mcp_agent.config.yaml` file, very similar to how they are configured for Claude Desktop:

```

$schema: "https://raw.githubusercontent.com/lastmile-ai/mcp-agent/main..."

mcp:

  servers:

    fetch:

      command: "uvx"

      args: ["mcp-server-fetch"]

    filesystem:

      command: "npx"

      args: ["-y", "@modelcontextprotocol/server-filesystem", "."]

    slack:

      command: "npx"

      args: ["-y", "@modelcontextprotocol/server-slack"]

```

I have submitted an issue and PR into the openai-agents-python repo [2], and my plan is instead of a fork, I will create an extension package for MCP support (coming later today).

I was able to do this pretty quickly (got it working yesterday) because I've been building the mcp-agent library (https://github.com/lastmile-ai/mcp-agent), which makes MCP server aggregation/connection really easy. I did a Show HN about it a few weeks ago [3].

Wanted to share here to get community feedback on whether this is useful, which will help me decide if I should dedicate more time to it.

[1] - https://github.com/lastmile-ai/mcp-agent

[2] - https://github.com/openai/openai-agents-python/issues/23

[3] - https://news.ycombinator.com/item?id=42867050

user:	juan-abia
created:	March 12, 2025
karma:	1