Use it inside Claude, ChatGPT, Cursor and more.Use it in your AI tools.Set it up
Try on 250 contacts for free
Developers

Build it into your stack.

One endpoint, one MCP tool. Guides for each thing developers build with them, with real request and response shapes.

DevelopersA phone validation API that returns a decision.One POST with up to 100 contacts. Each comes back with a grade, a plain-language outcome and the action to take, so your code routes the contact instead of interpreting raw line data.

Know who’ll answer
before you call.

Grade 250 contacts free. No card required, and US phone numbers only.

  • US phone numbers only
  • No card required
  • One credit per checked contact
Check 250 contacts freeOr read the docs