Detect Temporary SMS & Disposable Phone Numbers
Free SMS services verify fake accounts on your platform. Block them instantly with our database of Free Phone Numbers and Temporary SMS lines.
How It Works
Stop fraud at the door. When a user signs up, ChkSMS instantly verifies if their phone number is from a disposable SMS service, allowing you to block bad actors before they verify.
# Check a phone number via API
curl -X GET "http://localhost:8000/api/v1/check/+1234567890" \
-H "x-api-key: YOUR_API_TOKEN"
// Response
{
"is_virtual": true,
"evidence_url": "https://s3.../evidence.png",
"source_id": 4
}
{
"is_virtual": true,
"evidence_url": "https://s3.../evidence.png",
"source_id": 4
}
Real-time Detection
Our crawlers constantly monitor hundreds of fake SMS archives to keep our database up to date.
Verifiable Evidence
We provide screenshot evidence for every positive match, so you can trust the result.
Easy Integration
Simple REST API that integrates into your registration flow in minutes.