Number Verify API
What is Number Verify API?
The Number Verify API is a CAMARA network API that confirms a phone number genuinely belongs to the device making a request — checked directly against the mobile network rather than by sending an SMS OTP — letting an app silently verify a user's number in the background during sign-up or login. It removes the friction (and cost) of an OTP round trip for the common case of a user on their own registered mobile connection.
More detail
Number Verify works by confirming the request originates from the mobile network session tied to the claimed number, so it only functions when the request comes over that same mobile connection, not Wi-Fi or a different network.
Because it replaces an SMS OTP round trip, Number Verify both speeds up sign-up flows and removes an SMS delivery cost and potential delivery failure point from the verification step.
Frequently asked
- How is Number Verify different from an SMS OTP?
- An SMS OTP sends a code the user manually re-enters into the app; Number Verify confirms the number silently in the background by checking directly with the mobile network the request came from, with no code to type and no SMS sent.
- Does Number Verify work over Wi-Fi?
- No — it relies on the request coming over the actual mobile network connection tied to that phone number, so it only functions on a cellular data connection, not Wi-Fi or another network the device might be using instead.
See also
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