Finding a good domain is half the battle. tldx is a blazing-fast, concurrent CLI tool that generates and checks domain availability in bulk via RDAP. Mix keywords, prefixes/suffixes, or regex, and stream results to stdout, JSON, or CSV. Plus, tldx includes an MCP server, empowering AI agents (like Claude) to brainstorm and verify domains for you automatically! Install via Homebrew (brew install tldx). Say goodbye to rate-limits and legacy whois parsing. 100% Free & Open Source in Go.
Hey PH! 👋
I’m always building small tools for myself that end up buried in private repos. (Seriously, only 35 out of 120 are public, and most of those are just forks.)
I open sourced tldx a year ago. It's my solution to the domain search process that happens for founders.
I wanted something I could ask: "give me every combo of get, use + my keyword + .com, .io, .ai and tell me what's free" and just get results. So I built it. It had to be fast, private, and easy to ideate with.
It's written in Go, fully open source, and available via Homebrew, winget, and AUR. There's also an MCP server built in, so it's easy to integrate into agentic workflows.
Check it out and let me know what you think:
GitHub: https://github.com/brandonyoungd...
About tldx on Product Hunt
“Fast CLI to bulk-check domains via RDAP & MCP”
tldx launched on Product Hunt on May 25th, 2026 and earned 105 upvotes and 3 comments, placing #11 on the daily leaderboard. Finding a good domain is half the battle. tldx is a blazing-fast, concurrent CLI tool that generates and checks domain availability in bulk via RDAP. Mix keywords, prefixes/suffixes, or regex, and stream results to stdout, JSON, or CSV. Plus, tldx includes an MCP server, empowering AI agents (like Claude) to brainstorm and verify domains for you automatically! Install via Homebrew (brew install tldx). Say goodbye to rate-limits and legacy whois parsing. 100% Free & Open Source in Go.
On the analytics side, tldx competes within Open Source, Developer Tools and GitHub — topics that collectively have 622.7k followers on Product Hunt. The dashboard above tracks how tldx performed against the three products that launched closest to it on the same day.
Who hunted tldx?
tldx was hunted by Brandon Young. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of tldx including community comment highlights and product details, visit the product overview.
Brandon Young