# Instant Aadhaar Number Validation for KYC API | FastKYC

> Verify an Indian Aadhaar number instantly and confirm it is valid and in use, with essential identity insights for faster, safer customer onboarding.

Source: https://www.fastkyc.com/apis/aadhaar-validation/

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[Identity APIs](/apis/identity/)

# Aadhaar Validation API

Verify an Indian Aadhaar number instantly and confirm it is valid and in use, with essential identity insights for faster, safer customer onboarding.

[Book a Demo](/book-demo/)

Category

[Identity APIs](/apis/identity/)

Built for

-   [Lending & NBFC](/industries/lending/)
-   [Banking](/industries/banking/)
-   [Fintech & Payments](/industries/fintech-payments/)
-   [Insurance](/industries/insurance/)
-   [Gaming & Fantasy Sports](/industries/gaming/)
-   [Crypto & Web3](/industries/crypto/)
-   [Staffing & HR](/industries/staffing-hr/)
-   [Telecom](/industries/telecom/)
-   [Real Estate & Rentals](/industries/real-estate/)
-   [Healthcare](/industries/healthcare/)
-   [Logistics & Mobility](/industries/logistics/)
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## What the Aadhaar Validation API does

Aadhaar Validation checks an Aadhaar number and returns the identity insights available against it, confirming the number is well-formed and recognised.

Aadhaar is the most widely held identity credential in India, which makes it the natural anchor for onboarding. Validating the number before the rest of your flow depends on it prevents effort being spent on a typo or a fabricated digit string.

## Where teams use the Aadhaar Validation API

1.  Validating Aadhaar at the start of a KYC journey
    
2.  Confirming a number before running document verification
    
3.  Screening for fabricated Aadhaar numbers
    
4.  Cleaning Aadhaar data in an existing customer base
    

## Frequently Asked Questions (FAQs)

Does this expose the full Aadhaar details?

It returns essential insights, not a full demographic dump. UIDAI restricts what can be shared, and full eKYC requires a different, consent-based route.

What are my storage obligations?

Avoid storing full Aadhaar numbers without a lawful basis. Use Aadhaar Masking so only the last four digits are retained.

How do I get a cryptographically verifiable check?

Use Aadhaar XML Verification, which validates UIDAI's digital signature on an offline eKYC file.

## Related APIs

-   [Aadhaar XML Verification API Verify an offline Aadhaar eKYC XML by validating UIDAI's digital signature and extracting identity, address and photograph.](/apis/aadhaar-xml-verification/)
-   [E-Aadhaar Verify API Extract and verify Aadhaar details from an uploaded e-Aadhaar document, combining extraction with validation in one step.](/apis/eaadhaar-upload/)
-   [Farmer Verification API Verify a farmer's identity and registration status using their Aadhaar number and state code, for agri lending, subsidies and rural onboarding.](/apis/farmer-verification/)
-   [Get PAN Essentials API Retrieve a PAN holder's essential details, including name, date of birth and gender, to match a customer's identity against their PAN in seconds.](/apis/get-pan-essentials/)

## Start verifying with the Aadhaar Validation API

Book a walkthrough and we will show the call, the response and how it fits your onboarding flow.

[Book a Demo](/book-demo/) [Browse All APIs](/apis/)

-   One API key for every check
-   Verified against official Indian records
-   Built for onboarding at scale