three.ws Brain MCP Server

by nirholasio.github.nirholas/brain-mcpv0.1.3

List LLM providers and run chat completions through the three.ws multi-provider router.

228Node.jsstdioofficial registry

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Active2d ago

Install three.ws Brain MCP server

claude mcp add brain-nirholas -e THREE_WS_API_KEY='<three-ws-api-key>' -- npx -y @three-ws/brain-mcp

{
  "mcpServers": {
    "brain-nirholas": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/brain-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "<three-ws-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "brain-nirholas": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/brain-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "<three-ws-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "brain-nirholas": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/brain-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "<three-ws-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "brain-nirholas": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/brain-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "<three-ws-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
THREE_WS_BASE	—	—	Base URL of the three.ws API that fronts the LLM router (/api/brain/chat). Override only when self-hosting or targeting a preview deployment.
THREE_WS_API_KEY	—	yes	Optional three.ws API key (sk_live_… / sk_test_…) or OAuth access token, sent as a Bearer token. Required only to use paid first-party flagships (Claude, GPT-5, o3, Grok, Qwen Plus, DeepSeek). Free open-weight tiers (GPT-OSS 120B, NVIDIA NIM models) work with no key. Create one at https://three.ws/dashboard/developers.
THREE_WS_TIMEOUT_MS	—	—	Per-request timeout in milliseconds. Chat completions stream server-side and are collapsed into a single reply, so this is generous by default to ride out a long flagship answer.

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-08 · 2d ago · GitHub
Latest release
2026-09-30 · 9d ago · GitHub · v1.5.2
Package published
no data · npm/PyPI
Registry entry updated
2026-08-19 · 51d ago · official registry · v0.1.3

FAQ

›How do I install the three.ws Brain MCP server in Claude Code?

Run: claude mcp add brain-nirholas -e THREE_WS_API_KEY='<three-ws-api-key>' -- npx -y @three-ws/brain-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does three.ws Brain require an API key?

Yes. It expects THREE_WS_API_KEY, of which 1 is a secret.

›Can I use three.ws Brain as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is three.ws Brain in the official MCP registry?

Yes, as io.github.nirholas/brain-mcp.