Show HN: Vacant, a fast domain checker for you and your agent

Category: cli-tool

Tags: domain-checker, cli-tool, rust

Score: 6.5/10 (Innovation: 6, Technical: 7, Documentation: 7, Utility: 6)

Vacant is a fast domain availability checker that queries authoritative TLD nameservers directly instead of using WHOIS, reducing latency and avoiding rate limits. It is notable for being distributed as a Rust library and CLI as well as Python and npm packages via embedded Rust engines (PyO3 and napi-rs), and for providing a ready-made agent skill for coding agents like Claude Code.

Target audience: backend devs, devops, data engineers

Repository: https://vacant.alltuner.com/ · Rust · MIT

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