Welcome to Check Harbor

Check Harbor helps you validate and enrich user-submitted data in real time — before it enters your systems.

What you can do

Email Validation
Syntax check, MX lookup, disposable detection, deliverability scoring.
Phone Validation
Format parsing, line type, carrier, optional live HLR lookup.
IP Intelligence
VPN/proxy/Tor detection, ASN, geolocation, abuse score.
Unified Verify
Single call fraud score combining email + phone + IP signals.

Key features

  • Zero setup — one API key, REST endpoints, JSON responses
  • Credit-based — pay only for what you use, no monthly minimums on free tier
  • Batch processing — validate thousands of records via CSV upload
  • SDKs — TypeScript/Node and Python with zero boilerplate
  • n8n node — drag-and-drop integration for no-code workflows

Base URL

https://api.checkharbor.com

All endpoints are versioned under /v1/.