Free email and phone tools
ContactLint offers free email and phone checkers that need no signup, plus an API and an MCP server for AI agents. Each API key includes 100 free checks per month, and credit packs are available at 5,000 for $9, 25,000 for $35, and 100,000 for $99.
Disposable email checker
One address with DNS, or up to 50 at once.
Phone number validator
Valid, region, line type and formats.
Disposable domain list
9,880 domains, stats and a plain text download.