Onyx MCP for Claude Code

io.github.bywaleed/onyx-mcp

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

client:Claude Code transport:stdio runtime:npm

Install Onyx MCP in Claude Code

run in your project directory

claude mcp add onyx-mcp -e ONYX_API_URL=<ONYX_API_URL> -e ONYX_API_TOKEN=<ONYX_API_TOKEN> -e ONYX_DEFAULT_PERSONA_ID=<ONYX_DEFAULT_PERSONA_ID> -e ONYX_MCP_ENABLE_WEB_FETCH=<ONYX_MCP_ENABLE_WEB_FETCH> -e ONYX_MCP_WEB_FETCH_ALLOWLIST=<ONYX_MCP_WEB_FETCH_ALLOWLIST> -- npx -y onyx-mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

Onyx MCP in other clients

Claude Desktop
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VS Code
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Windsurf
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Grok
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Onyx MCP MCP server