Flash call verification API that's 80% cheaper than SMS. One missed call, caller ID contains the code. Done.
# Initiate a flash call verification
curl -X POST https://api.flashverify.net/v1/verify \
-u "your_api_key:your_api_secret" \
-H "Content-Type: application/json" \
-d '{
"phone_number": "+919876543210",
"method": "flash_call"
}'
# Response: user sees incoming call from +441908731234
# The last 4 digits (1234) are the verification code
{
"request_id": "a1b2c3d4-e5f6-...",
"status": "sent",
"method": "flash_call",
"cost": { "amount": 0.30, "currency": "USD" }
}No app permissions needed. No SMS delays. Just a missed call with the code in the caller ID.
Send a POST request with the user's phone number. We return a request ID instantly. Takes ~200ms.
A single ring, just long enough for the caller ID to appear. The last 4 digits are the code, e.g. +441908731234.
Your app reads the code from the call log (or user types it) and sends it to our check endpoint. Verified.
Watch how a flash call automatically verifies a phone number on Android, with zero user interaction.
Choose the best method for your use case. Fall back automatically if needed.
A missed call where the last 4 digits of the caller ID are the verification code. Cheapest option, from $0.003/verification. Auto-readable on Android.
Automated call that reads out a 6-digit code. Works on all phones including landlines. Great fallback for flash call.
Traditional SMS with a verification code. Universal compatibility. Use as a final fallback or for markets where flash calls aren't supported.
Flash calls cost a fraction of SMS. No per-message carrier fees. Volume pricing available from $0.003/call.
Flash calls arrive in under a second. No SMS queues, no delivery delays. Users verify in seconds, not minutes.
Verify numbers in 200+ countries. Powered by 9Eons Limited' wholesale telecom infrastructure with direct carrier routes.
HMAC-signed webhooks, AES-256 encryption, bcrypt passwords. GDPR compliant. SOC 2 aligned practices.
Track verifications, success rates, and spend in real time. Export data, set alerts, manage API keys from one place.
RESTful API with clear docs. Code examples in cURL, Python, Node.js, and PHP. Webhook-driven architecture.
Pay-as-you-go. No contracts, no monthly minimums. Top up your balance and start verifying.
UK numbers from $0.005
UK numbers from $0.01
UK numbers from $0.03
Prices shown in USD. GBP and EUR also available. See full pricing →
Sign up in 30 seconds. Get API keys after approval. Start making flash calls.