PluginBench
MCP Server

Onto MCP Server

io.github.ravixalgorithm/onto

What is the Onto MCP server?

Clean Markdown and AI-readability scoring for any URL. Built for AI agents.

How to install Onto

Copy-paste configuration for popular MCP clients.

transport: stdio
Config generated by PluginBench — verify against the source before use.
Environment / auth
  • ONTO_API_KEY
    required
    secret

    Your Onto API key (get one at https://app.buildonto.dev/read/keys — free tier includes 1,000 requests/month).

  • ONTO_API_BASE

    Optional override for the Onto API base URL. Defaults to https://api.buildonto.dev.

Claude Desktop
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "onto": {
      "command": "npx",
      "args": [
        "-y",
        "@ontosdk/mcp"
      ],
      "env": {
        "ONTO_API_KEY": "<YOUR_ONTO_API_KEY>",
        "ONTO_API_BASE": "<YOUR_ONTO_API_BASE>"
      }
    }
  }
}
Cursor
~/.cursor/mcp.json
{
  "mcpServers": {
    "onto": {
      "command": "npx",
      "args": [
        "-y",
        "@ontosdk/mcp"
      ],
      "env": {
        "ONTO_API_KEY": "<YOUR_ONTO_API_KEY>",
        "ONTO_API_BASE": "<YOUR_ONTO_API_BASE>"
      }
    }
  }
}
Windsurf
~/.codeium/windsurf/mcp_config.json
{
  "mcpServers": {
    "onto": {
      "command": "npx",
      "args": [
        "-y",
        "@ontosdk/mcp"
      ],
      "env": {
        "ONTO_API_KEY": "<YOUR_ONTO_API_KEY>",
        "ONTO_API_BASE": "<YOUR_ONTO_API_BASE>"
      }
    }
  }
}
VS Code
.vscode/mcp.json
{
  "servers": {
    "onto": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@ontosdk/mcp"
      ],
      "env": {
        "ONTO_API_KEY": "<YOUR_ONTO_API_KEY>",
        "ONTO_API_BASE": "<YOUR_ONTO_API_BASE>"
      }
    }
  }
}
Claude Code
claude mcp add onto --env ONTO_API_KEY=<YOUR_ONTO_API_KEY> --env ONTO_API_BASE=<YOUR_ONTO_API_BASE> -- npx -y @ontosdk/mcp

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