Onyx MCP Server

Model Context Protocol (MCP) server for Onyx programming language with documentation, GitHub examples, and bridge connectivity

Remote serverstreamable-http

What is the Onyx MCP MCP server?

Model Context Protocol (MCP) server for Onyx programming language with documentation, GitHub examples, and bridge connectivity. That is what the onyx mcp mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

A Model Context Protocol (MCP) server providing search and query access to Onyx programming language documentation and GitHub code examples. The server includes comprehensive crawling capabilities to populate data, but crawling is NOT accessible through the MCP interface - ensuring clean separation between data collection and query functionality.

Getting it running

Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.

The tools it exposes

The server publishes 2 tools. What each one is for:

  • Installation — The Installation tool exposed by this server
  • Usage — The Usage tool exposed by this server

What it needs from you

Configuration is passed through the environment: GITHUB_TOKEN. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

  • Onyx compiler must be installed and available in PATH - Install from: https://onyxlang.io/ - The tool executes code in a sandboxed temporary directory - Default timeout of 10 seconds (configurable) prevents infinite loops

Things to watch

  • Your data travels to the provider's service, so the usual questions apply about what you send and what they retain.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

How it compares

Plenty of knowledge and memory servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Onyx MCP's toolset — Installation, Usage — is a fair guide to whether it matches your workflow. It is maintained by elias-michaias; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Available tools

ToolWhat it does
InstallationThe Installation tool exposed by this server.
UsageThe Usage tool exposed by this server.

How to install the Onyx MCP MCP server

{
  "mcpServers": {
    "onyx": {
      "command": "npx",
      "args": ["@onyxlang/mcp-server", "bridge", "--url", "https://mcp.onyxlang.io"]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

  • Onyx compiler must be installed and available in PATH - Install from: https://onyxlang.io/ - The tool executes code in a sandboxed temporary directory - Default timeout of 10 seconds (configurable) prevents infinite loops
VariableDescriptionRequired
GITHUB_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • Use Onyx MCP to Installation.
  • Use Onyx MCP to Usage.

Frequently asked questions

It connects Onyx MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 2 tools (Installation, Usage) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Onyx MCP directly.