Fast, universal domain availability checker - 1,200+ TLDs, pattern generation, RDAP with WHOIS fallback. CLI + Rust library + MCP server for AI agents.
Config is the same across clients — only the file and path differ.
{
"mcpServers": {
"domain-check": {
"command": "<see-readme>",
"args": []
}
}
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Universal domain exploration engine: fast domain availability checks across the internet — as a CLI, Rust library, and MCP server for AI agents.
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Universal domain exploration engine: fast domain availability checks across the internet — as a CLI, Rust library, and MCP server for AI agents.
Quick Links: Installation | Quick Start | Use Cases | Output Formats | Presets | Configuration | Automation | Library | MCP Server | FAQ | Contributing
.es, .co, .eu, .jp).\w=letter, \d=digit, ?=either), prefix/suffix permutations, and --dry-run to preview before checking.startup, tech, creative, finance, ecommerce, and more. Or define your own in config.--info.--json/--csv to stdout, --yes to skip prompts, --force for large runs, automatic non-TTY detection.DC_* environment variables, custom presets, and clear precedence rules.domain-check-lib (Rust library), and domain-check-mcp (MCP server).| Method | Command | Notes |
|---|---|---|
| Homebrew (macOS) | brew install domain-check | Easiest install for macOS users |
| Cargo (CLI) | cargo install domain-check | Works on all Rust-supported platforms |
| Cargo (MCP) | cargo install domain-check-mcp | MCP server for AI agents |
| GitHub Releases | Download binaries | CLI + MCP binaries for macOS, Linux, Windows |
# Check a single domain
domain-check example.com
# Expand a base name across TLDs
domain-check mystartup -t com,org,io,dev
# Use a curated preset
domain-check myapp --preset startup --pretty
# Generate names with a pattern (preview only)
domain-check --pattern "app\d" -t com --dry-run
# Add prefixes and suffixes
domain-check myapp --prefix get,try --suffix hub,ly -t com,io
# Get registrar and date info
domain-check target.com --info
# Check every known TLD
domain-check brand --all --batch
Pretty output:
domain-check v0.9.1 — Checking 8 domains
Preset: startup | Concurrency: 20
... [View full README on GitHub](https://github.com/saidutt46/domain-check#readme)