The carrier knows which SIM owns which IP. TensorAuth asks.
APIs that read authentication signals from the carrier's core network. Silent verification via IP-to-MSISDN correlation, with automatic SMS OTP fallback when cellular isn't available.
“Silent auth reduced our signup drop-off by 34%. The users who can’t verify silently get an automatic SMS fallback — no one gets stuck.”
“We replaced our entire OTP stack with one TensorAuth call. SIM swap fraud dropped to near zero once we added the IMSI Age pre-check.”
“KYC Match lets us verify identity against the carrier’s SIM registration records without ever seeing the customer’s personal data. Compliance loves it.”
“Device Binding caught a SIM cloning ring we’d been chasing for months. Three IMEIs rotating across 200 SIM cards — flagged in a single batch query.”
Your dashboard on day one.
Every API call returns structured, queryable data. Phone number, method used, result, carrier, latency.
How silent authentication actually works
Your backend calls the verify endpoint. Our mobile SDK forces the request over the cellular interface. The carrier resolves the public IP to a subscriber's MSISDN via its PGW, GGSN, or SMF. No password, no OTP entry, no user friction. 40–70% of users verify silently; the rest get an automatic SMS fallback.
