Local + RemoteFree

2o MCP server

russellshen1992/2o

Human intelligence API — AI agents verify facts with human domain experts via MCP

Source code

Install 2o in Claude Code

Remote URL

Claude Code
claude mcp add --transport sse 2o https://www.2oapi.xyz/api/mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "2o": {
      "url": "https://www.2oapi.xyz/api/mcp"
    }
  }
}

npm

Claude Code
claude mcp add 2o -- npx -y @russellshen1992/2o-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "2o": {
      "command": "npx",
      "args": [
        "-y",
        "@russellshen1992/2o-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the 2o MCP server do?

Human intelligence API — AI agents verify facts with human domain experts via MCP

Is the 2o MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does 2o run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add 2o to Claude Code?

Run: claude mcp add --transport sse 2o https://www.2oapi.xyz/api/mcp

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