Model Context Protocol (MCP) Server

Available Tools

63 tools across 10 categories — your MCP client discovers the full list, with exact names and parameters, automatically once connected. A few highlights:

• sanitize_filename: Automatically removes forbidden characters and handles Windows reserved names to prevent InvalidCharError.
• detect_homoglyphs: Scans strings for Unicode lookalike characters, zero-width spaces, and invisible markers used in spoofing attacks.
• format_json: Validates, prettifies, or minifies JSON strings. Can recursively sort JSON keys.
• time_calculate_difference: Precisely calculates the duration between two ISO-8601 date strings down to the millisecond.
• security_generate_password: Generates passwords, memorable passphrases, or PINs with an entropy/strength rating.
• wealth_convert_currency: Converts between currencies using live exchange rates, with an offline fallback.
• Plus list, table, text, JSON, SQL/CSS, and loan/debt utilities — the full catalogue mirrors the site's text-based tools.

How to Connect (Claude Desktop / Cursor)

We provide an SSE (Server-Sent Events) endpoint. You can connect to it using the official MCP Inspector proxy, which bridges stdio to our remote web server.

Add the following configuration to your claude_desktop_config.json or Cursor settings:

{
  "mcpServers": {
    "useful-utilities": {
      "command": "npx",
      "args": [
        "-y", 
        "@modelcontextprotocol/inspector", 
        "https://mcp.usefulutils.in/sse"
      ],
      "env": {
        "AUTHORIZATION": "Bearer YOUR_FREE_API_KEY"
      }
    }
  }
}

Connect to a focused subset (recommended)

Your client loads every tool definition into the model's context and re-sends it on every request for the whole session. The full catalogue costs roughly 12,000 tokens — about 6% of a 200K context window — which is a poor trade if your agent only ever reaches for a handful of tools.

So each category is also served on its own endpoint. Point your client at the one you actually want and pay a fraction of the context:

Same API key everywhere, and /mcp and /sse are unchanged — an existing configuration keeps working exactly as before.