# domain-check

Checks domain availability through RDAP and embedded WHOIS directly from your AI agent. Helps discover project names or verify hundreds of extensions in batch.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed · ★ 306
- Author: saidutt46
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/saidutt46/domain-check
- Updated: 2026-10-19
- HTML: https://affpapa.org/en/nevibecode/mcp/domain-check

## What it does

This Rust-based engine queries registries via RDAP and switches to built-in WHOIS whenever RDAP endpoints are missing. No system `whois` package is needed. The tool discovers official IANA registries for over 1,200 top-level domains, with 34 hardcoded zones ready for offline runs. Batch scanning handles up to 100 concurrent lookups.

Apart from single lookups, the server expands custom patterns with letters and numbers, attaches prefixes or suffixes, and applies curated presets like `startup` or `tech`. It also reads RFC 10023 records to detect if registered domains are listed for sale with prices and contact details. Building through Cargo requires a local Rust toolchain.

## Requirements
- Needs: a prebuilt binary from the repository releases

## Install

### Claude Code (native platform)

**Install**
- The MCP registry has no launch command for it: see the repository README

## When to use it
- check availability across multiple TLDs for a startup brand
- generate naming variations with custom patterns, prefixes, or suffixes
- inspect registrar details and expiration dates for registered domains
- identify domain sale status and asking prices via RFC 10023

## Example prompts
- Check if the domain mycoolapp is available using the startup preset
- Generate name ideas matching pattern brand\d for the io extension
- Look up registrar information and expiration status for target.com

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md