rasaboun/dispo

dispo is a command line tool that checks whether a domain name, like example.com, is available to register, without needing a paid API subscription or visiting a domain registrar's website manually. It is written in TypeScript and built to run with the Bun or Node.js JavaScript runtimes. The tool works by first querying RDAP, a modern registration data protocol, for the domain's top level extension. If RDAP is not available for that extension, it falls back to the older WHOIS protocol, opening a direct connection to WHOIS servers and pattern matching the response to figure out if a domain is registered or free. Results are classified as registered, available, or unknown when neither method gives a confident answer. You can run dispo instantly with npx or bunx without installing anything, install it globally as a command line program, build a standalone binary for Mac or Linux that does not require Bun at runtime, or run it directly from the source code. Once running, you can check one or many domains at a time, read a list of domains from a file or piped input, get output as a formatted table or as JSON, and control things like how many checks run at once, delays between requests, and which domain extensions to try for a base name. The tool paces its requests with a small delay by default to avoid overloading domain registries, and this delay can be adjusted or turned off. It also supports being installed as a skill for compatible AI coding agents, so an agent can automatically use dispo when a user asks it to check whether a domain name is free. The README notes that automated tests are included and run offline using mocked network calls. No license is stated in the README.