AT&T Developer Hub · Capability
AT&T Network Security
Unified network-based security capability combining SIM Swap detection, Number Verification, and Mobility Threat Detection APIs. Used by developers building fraud prevention, authentication, and security monitoring applications leveraging AT&T network signals.
What You Can Do
POST
Check sim swap
— Check if a SIM card has been swapped recently
/v1/sim-swap/check
POST
Retrieve sim swap date
— Get date of most recent SIM swap
/v1/sim-swap/date
POST
Verify phone number
— Silently verify device phone number
/v1/number-verification/verify
MCP Tools
sim-swap-check
Check if an AT&T subscriber's SIM card has been swapped recently to detect fraud
read-only
idempotent
sim-swap-get-date
Get the exact date and time of the most recent SIM swap for a phone number
read-only
idempotent
number-verify
Silently verify that a mobile device is associated with a phone number using the AT&T network
read-only
idempotent
APIs Used
att-sim-swap
att-number-verification