> ## Documentation Index
> Fetch the complete documentation index at: https://developer.sandbox.co.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Aadhaar Verification API (Aadhaar OTP Verification) for digital KYC—generate OTP and verify OTP to fetch verified Aadhaar identity details for onboarding, compliance, and fraud prevention.

# Aadhaar Verification API

Aadhaar is India's 12-digit unique identity number issued by UIDAI. Use this API to verify an individual's Aadhaar by sending an OTP to the Aadhaar-linked mobile number and validating it to fetch offline e-KYC details for compliance and fraud prevention.

Verify identity with user consent following UIDAI guidelines.

<CardGroup cols={2}>
  <Card title="OTP-based verification" icon="shield-check">
    Send an OTP to the Aadhaar-linked mobile number, then verify it to retrieve identity details. Requires user consent and a verification reason.
  </Card>

  <Card title="Verified KYC data" icon="id-card">
    Returns name, DOB, gender, address, and hashed contact fields as per UIDAI offline e-KYC guidelines.
  </Card>
</CardGroup>

## How it works

<Steps>
  <Step title="Generate OTP">
    Send a request with the Aadhaar number, user consent, and verification reason.
  </Step>

  <Step title="User receives OTP">
    An OTP is delivered to the Aadhaar-linked mobile number.
  </Step>

  <Step title="Verify OTP">
    Submit the `reference_id` and OTP to retrieve offline e-KYC details.
  </Step>

  <Step title="Use KYC response">
    Match the verified details against your onboarding form and store what compliance requires.
  </Step>
</Steps>

## What you can do

<CardGroup cols={2}>
  <Card title="Digital KYC & onboarding" icon="user-check">
    Verify identity during signup, account opening, lending, and payment flows. Reduce drop-offs without compromising KYC controls.
  </Card>

  <Card title="Demographic verification" icon="id-card">
    Retrieve verified name, date of birth, gender, and address for identity checks.
  </Card>

  <Card title="Hashed contact data" icon="database">
    Get hashed contact fields for risk and deduplication checks without storing raw values.
  </Card>

  <Card title="Fraud prevention" icon="shield">
    Check Aadhaar authenticity to prevent duplicate accounts and fraud in high-risk flows.
  </Card>
</CardGroup>

## API reference

| API                                                               | Purpose                                    |
| :---------------------------------------------------------------- | :----------------------------------------- |
| [Generate OTP](/api-reference/kyc/aadhaar/endpoints/generate_otp) | Send OTP to Aadhaar-linked mobile number   |
| [Verify OTP](/api-reference/kyc/aadhaar/endpoints/verify_otp)     | Validate OTP and retrieve identity details |

## Common use cases

Use Aadhaar OTP verification when you need to:

* Verify identity during **customer onboarding** (fintech, NBFCs, wallets, marketplaces)
* Validate Aadhaar before **account opening** or **KYC refresh**
* Reduce **fraud** and **duplicate accounts** in high-risk flows
* Replace manual KYC checks with **real-time verification**
* Collect verified address/DOB for regulated workflows

## Frequently Asked Questions

<AccordionGroup>
  <Accordion title="What is Aadhaar OTP Verification?">
    An identity verification method that sends an OTP to the Aadhaar-linked mobile number. After validation, the API returns offline e-KYC details per UIDAI guidelines.
  </Accordion>

  <Accordion title="What endpoints do I need?">
    Two APIs:

    * [Generate OTP](/api-reference/kyc/aadhaar/endpoints/generate_otp)
    * [Verify OTP](/api-reference/kyc/aadhaar/endpoints/verify_otp)
  </Accordion>

  <Accordion title="What data do I get after verification?">
    The API returns name, DOB, gender, and address. Hashed contact fields may be included based on consent. Available fields vary by case.
  </Accordion>

  <Accordion title="Does the user need a mobile number linked to Aadhaar?">
    Yes. The Aadhaar-linked mobile must be active to receive the OTP.
  </Accordion>

  <Accordion title="How long is the OTP valid?">
    OTP validity is time-limited. If it expires, use the [Generate OTP](/api-reference/kyc/aadhaar/endpoints/generate_otp) endpoint to request a new one.
  </Accordion>
</AccordionGroup>