# Send One-Time Passcodes for Email Verification API | FastKYC

> Send a one-time password to an email address to begin verifying the customer controls that inbox, the first step of email ownership verification.

Source: https://www.fastkyc.com/apis/send-email-otp/

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[Identity APIs](/apis/identity/)

# Email Verification Send OTP API

Send a one-time password to an email address to begin verifying the customer controls that inbox, the first step of email ownership verification.

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Category

[Identity APIs](/apis/identity/)

Built for

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

## What the Email Verification Send OTP API does

Email Verification Send OTP delivers a one-time password to the email address supplied, starting the verification of that address.

Sending an OTP proves more than a format check ever could. It establishes that the address exists, accepts mail, and is being read by whoever is completing your flow.

## Where teams use the Email Verification Send OTP API

1.  Verifying an email address at sign-up
    
2.  Confirming an address change on an account
    
3.  Establishing a reliable channel before sending statements
    

## Frequently Asked Questions (FAQs)

How long is the OTP valid?

A short window. Generate a fresh one rather than asking the user to retry an expired code.

Should I check the address first?

Yes. Email Check filters invalid and disposable addresses before you spend a send on them.

What comes next?

Validate Email OTP confirms the code and completes verification.

## Related APIs

-   [Validate Email OTP API Validate an email one-time password and confirm the customer controls the address they supplied, completing email ownership verification.](/apis/validate-email-otp/)
-   [EPFO Submit OTP API Validate the EPFO one-time password and complete authentication, unlocking access to the employee's provident fund records.](/apis/epfo-submit-otp/)
-   [Email Check API Verify an email address is legitimate and deliverable, filtering out disposable, invalid and undeliverable addresses before they enter your database.](/apis/email-check/)
-   [Contact Details by GST API Fetch 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/)

## Start verifying with the Email Verification Send OTP API

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

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