OTP API

Verify a mobile number by SMS - send a one-time password, check it, and resend when it does not arrive.

---

Overview & Solution

Mobile number verification sits at the front of almost every onboarding flow, and it is where a surprising share of drop-off happens: the code is slow, it never arrives, or there is no way to retry without starting over.

The OTP API covers the whole loop - send, verify, resend - with configurable code length and expiry, so verification fits your flow rather than the other way round.

Key Value Propositions

• Complete loop - send, verify and retry are all covered; no half-implemented resend.
• Configurable - set code length and expiry per request to match your risk appetite.
• Template support - send through your own approved SMS template so the message carries your brand.

---

Industry Use Cases

1. Customer Onboarding & KYC

• Number verification at signup - confirm the applicant controls the number before creating an account.
• Contactability check - catch mistyped numbers at the point of entry rather than at first collection call.

2. Field Operations

• Customer-present confirmation - have the field officer trigger an OTP to the customer's phone to evidence the visit actually happened with the customer there.
• Delivery and handover - confirm the recipient at the doorstep.

3. Transaction & Approval Flows

• Step-up authentication - require a code before a sensitive change or approval.
• Consent capture - record that the number holder agreed at a specific time.

---

How it works

graph LR
    A[Send OTP] --> B[Customer receives SMS]
    B --> C{Code entered?}
    C -->|Yes| D[Verify]
    C -->|Not received| E[Resend]
    E --> B

1. Send - request a code for a mobile number, with your chosen length and expiry.
2. Verify - submit the code the customer entered.
3. Resend - trigger a retry through the selected channel if the first attempt did not land.

---

Works well with

Pair it with	To get
Employee Management API	Verified numbers on workforce records
Custom Data Layers API	Verified numbers on your own customer records
Events API	A timestamped record that verification occurred