URL and Base64 Toolkit

URL and encoding work offline: parse a URL, percent-encode or decode text, and convert base64 both ways - fully local.

Keyless — no signup, no API key, no environment variables.

Install

npx -y @mrfentmen/uri-mcp

Or add it to your MCP client:

{
  "mcpServers": {
    "uri-mcp": { "command": "npx", "args": ["-y", "@mrfentmen/uri-mcp"] }
  }
}

Tools

| Tool | What it does | |---|---| | parse_url | Break a URL into parts and list its query parameters decoded. | | encode_url | Percent-encode text, either as a component or as a whole URL. | | decode_url | Percent-decode text and report any malformed escapes. | | base64_encode | Encode text to base64 or base64url. | | base64_decode | Decode base64 or base64url back to text. |

Data source

WHATWG URL parsing and base64 helpers, running locally