syncing blocklists...

Block fake signups
in milliseconds.

A developer-first email validation API. Detect disposable domains, verify MX records, catch typo domains, and stop bots before they reach your database.

Get Started for FreeRead the docs

No credit card required. 100 free requests/mo • < 50ms API Latency

BASH
$ curl -X POST https://api.signguard.co/v1/check \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{ "email": "spammer@gmaill.com" }'
api.signguard.co
CONNECTED