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Domain Checker Mcp

wearebravelabs/domain-checker-mcp

Exposes three tools for checking domain availability through Claude: check_domains for full DNS and RDAP/WHOIS verification, check_names to test base names across multiple TLDs automatically, and check_domains_quick for DNS-only speed checks. Built by Brave Labs, it handles up to 100 domains in parallel with batched verification queries. The hybrid approach runs fast DNS lookups first, then confirms availability through RDAP with WHOIS fallback by pulling from IANA's bootstrap registry. Responses include summary stats and separate lists for available, taken, and errored domains. Reach for this when you're brainstorming project names or need to verify domain availability without leaving your Claude conversation.

tools
3
transport
STDIO
last updated
Jan 22, 2026
View on GitHub

Tools

3 tools

Public tool metadata for what this MCP can expose to an agent.

check_domainsCheck specific domains for availability with full DNS + WHOIS verification.

Check specific domains for availability with full DNS + WHOIS verification.

No parameter schema in public metadata yet.

check_namesCheck base names across popular TLDs automatically.

Check base names across popular TLDs automatically.

No parameter schema in public metadata yet.

check_domains_quickFast DNS-only check without WHOIS verification.

Fast DNS-only check without WHOIS verification.

No parameter schema in public metadata yet.

Sponsors

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Readme

Domain Checker MCP Server

Fast domain availability checker for Model Context Protocol (MCP). DNS + RDAP/WHOIS verification.

Built by Brave Labs

Features

  • Hybrid DNS + RDAP/WHOIS checking - Fast DNS lookup, then RDAP (with WHOIS fallback) for accuracy
  • Bulk checking - Check up to 100 domains in parallel
  • Parallel processing - Batched verification queries for optimal throughput
  • Name expansion - Check a base name across all popular TLDs automatically
  • Flexible filtering - Return only available, only taken, or all results
  • Error reporting - Clear error handling for timeouts and failures

Installation

npm install -g @wearebravelabs/domain-checker-mcp

Configuration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "domain-checker": {
      "command": "npx",
      "args": ["-y", "@wearebravelabs/domain-checker-mcp"]
    }
  }
}

Claude Code

Add to your MCP settings:

View the full README on GitHub

Details

Repository
github.com/wearebravelabs/domain-checker-mcp
Package
@wearebravelabs/domain-checker-mcp
Transport
STDIO
Registry
MCP registry, active