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Onyx MCP for VS Code

io.github.bywaleed/onyx-mcp

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

client:VS Code transport:stdio runtime:npm

Install Onyx MCP in VS Code

.vscode/mcp.json

{
  "inputs": [
    {
      "type": "promptString",
      "id": "onyx-api-url",
      "description": "ONYX_API_URL",
      "password": true
    },
    {
      "type": "promptString",
      "id": "onyx-api-token",
      "description": "ONYX_API_TOKEN",
      "password": true
    },
    {
      "type": "promptString",
      "id": "onyx-default-persona-id",
      "description": "ONYX_DEFAULT_PERSONA_ID",
      "password": true
    },
    {
      "type": "promptString",
      "id": "onyx-mcp-enable-web-fetch",
      "description": "ONYX_MCP_ENABLE_WEB_FETCH",
      "password": true
    },
    {
      "type": "promptString",
      "id": "onyx-mcp-web-fetch-allowlist",
      "description": "ONYX_MCP_WEB_FETCH_ALLOWLIST",
      "password": true
    }
  ],
  "servers": {
    "onyx-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "onyx-mcp"
      ],
      "env": {
        "ONYX_API_URL": "${input:onyx-api-url}",
        "ONYX_API_TOKEN": "${input:onyx-api-token}",
        "ONYX_DEFAULT_PERSONA_ID": "${input:onyx-default-persona-id}",
        "ONYX_MCP_ENABLE_WEB_FETCH": "${input:onyx-mcp-enable-web-fetch}",
        "ONYX_MCP_WEB_FETCH_ALLOWLIST": "${input:onyx-mcp-web-fetch-allowlist}"
      }
    }
  }
}

VS Code prompts for each input the first time the server starts, so no secret is written to the file. VS Code docs

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