Onyx MCP Server

by bywaleed Your server? Claim it

local only

Onyx MCP runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 30 Aug 2026.

Secure MCP access to Onyx search, chat, projects, and administration.

—

Installs / week

npm · onyx-mcp

Stars

0 open issues

30 Aug 2026

Last commit

0 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check Onyx MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add onyx-mcp -- npx -y onyx-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "onyx-mcp": {
      "args": [
        "-y",
        "onyx-mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.onyx-mcp]
command = "npx"
args = ["-y", "onyx-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "onyx-mcp": {
      "args": [
        "-y",
        "onyx-mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "onyx-mcp": {
      "args": [
        "-y",
        "onyx-mcp"
      ],
      "command": "npx"
    }
  }
}

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Onyx MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Onyx MCP?

Onyx MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package onyx-mcp.

How do I connect Onyx MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls onyx-mcp straight from npm; nothing to host, nothing to sign up for.

Is Onyx MCP open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.