# Verify Mobile Number Ownership with OTP Submit API | FastKYC

> Confirm a mobile number by validating its OTP against the reference ID, returning verified subscriber and network details.

Source: https://www.fastkyc.com/apis/mnv-submit-otp/

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[Mobile](/apis/mobile/)

# MNV Submit OTP API

Confirm a mobile number by validating its OTP against the reference ID, returning verified subscriber and network details.

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

Overview

## What the MNV Submit OTP API does

MNV Submit OTP completes verification. Supply the reference ID from the generate step along with the code the user entered, and the API confirms the match and returns the subscriber and network details for the number.

A successful response is strong evidence: the person completing your flow is physically holding the SIM. That is a materially higher bar than any check based on records alone.

## Built for

[Fintech & Payments](/industries/fintech-payments/)[Gaming & Fantasy Sports](/industries/gaming/)[Crypto & Web3](/industries/crypto/)[Telecom](/industries/telecom/)

Use cases

## Where teams use the MNV Submit OTP API

-   Completing sign-up verification for a new customer
    
-   Confirming possession of a SIM before a high-value action
    
-   Recording proof of number ownership for compliance
    

## Frequently Asked Questions (FAQs)

## Related APIs

-   [MNV Generate OTP APISend a verification OTP to an Indian mobile number and receive a reference ID for confirming the code and the subscriber details.](/apis/mnv-generate-otp/)
-   [MNV Without OTP APIVerify an Indian mobile number and get subscriber and network details without sending an OTP, so customers are never interrupted during onboarding.](/apis/mnv-without-otp/)
-   [MNV Without OTP Basic APIGet essential subscriber and network details for a mobile number without an OTP, in a lightweight verification call built for high-volume checks.](/apis/mnv-without-otp-basic/)
-   [Contact Details by GST APIFetch the mobile number and email address registered against a GST number, giving you verified contact details for a business you are onboarding.](/apis/gst-to-contact-details/)

## Guides on the MNV Submit OTP API

-   [GuideCNAP Explained: How KYC-Verified Caller Names Will Appear on CallsCNAP will show KYC-verified caller names on incoming calls from 1 November 2026. Learn how it works, why it matters, and how it differs from Truecaller.](/blog/cnap-caller-name-presentation/)

## Start verifying with the MNV Submit OTP API

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

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

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