Overview

Everything here wraps the same HTTP API, so whichever you pick you are talking to one service. Each page carries installation, a quickstart and a reference.

Languages

• Node.js
• Python
• Go
• Java
• .NET
• PHP
• Ruby
• Rust
• Swift
• Erlang
• Perl
• Zig

Frameworks

Middleware that classifies the visitor on every request, so your own handlers get the answer without calling anything.

• Express - Node.js

Tools

• CLI - look up addresses and download the databases from a terminal, without writing any code.

AI agents

• MCP Server - gives an AI agent the lookup and dataset tools over the Model Context Protocol.

Everything here shares the same authentication model — see API Authentication.