# Autofill KYC Forms from a Mobile Number API | FastKYC

> Prefill a customer's KYC profile from a mobile number, returning name, contact details, addresses and demographic attributes.

Source: https://www.fastkyc.com/apis/mobile-to-prefill/

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[Merchant APIs](/apis/merchant/)

# Mobile To Prefill API

Prefill a customer's KYC profile from a mobile number, returning name, contact details, addresses and demographic attributes.

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

Category

[Merchant APIs](/apis/merchant/)

Built for

-   [Fintech & Payments](/industries/fintech-payments/)
-   [Marketplaces & E-commerce](/industries/marketplaces/)
-   [Telecom](/industries/telecom/)

## What the Mobile To Prefill API does

Mobile To Prefill assembles a customer profile from a mobile number: names on record, contact details, known addresses, identity attributes and demographic information.

The effect on completion rates is substantial. A form that arrives mostly filled and asks only for confirmation converts far better than one presenting a dozen empty fields, particularly on a phone.

## Where teams use the Mobile To Prefill API

1.  Prefilling onboarding forms to reduce drop-off
    
2.  Speeding up loan applications on mobile
    
3.  Cross-checking declared details against records
    
4.  Enriching a lead before deciding on diligence depth
    

## Frequently Asked Questions (FAQs)

What consent is required?

Explicit, recorded consent. This returns substantial personal data, so be specific about the purpose and keep the record.

How complete is the returned profile?

It varies by number. Treat every field as optional and design the form so the customer confirms or corrects what comes back.

How does it compare to Mobile 360?

Prefill is oriented to filling a KYC form. Mobile 360 casts wider, including financial and business associations.

## Related APIs

-   [CKYC Generate OTP API Send an OTP to the customer's CKYC-registered mobile number to authorise download of their Central KYC record, the first step of a consented CKYC fetch.](/apis/ckyc-generate-otp/)
-   [Company Name to CIN API Find a company's Corporate Identity Number and registration status by searching its name in the MCA registry, without asking the business for its CIN.](/apis/company-to-cin/)
-   [Generate e-Way Bill API Generate a GST-compliant e-Way Bill from invoice and transport details, returning the bill number and validity so goods can move without delays.](/apis/generate-eway-bill/)
-   [GSTIN By Name API Find every GSTIN registered against a business name across Indian states, with the status of each registration, when a merchant can't share its GSTIN.](/apis/gst-by-name/)

## Start verifying with the Mobile To Prefill 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