Strengthen Authentication with OTP Verification

ONE-TIME PASSCODE (OTP) -YOU SEND

One-Time Passcode (OTP) You Send provides a fast, reliable way to ensure the user actively controls the account before granting access to sensitive accounts, applications, or transactions.

Authentication API delivers an OTP solution through a simple API integration.  Your application requests an OTP from our API, and you deliver it to the end user using your own SMS, email, or other messaging provider. When the user enters the OTP, your application sends it back to our API for secure verification.

Just secure confirmation of email access through a single API.


PRICE: $0.025

HOW OTP-YOU SEND WORKS

1.  Your application sends an API Request to us.


2.  We generate a temporary, secure one-time passcode that is delivered to the you.  


3.  You deliver it to the end users email addrress, SMS, or other messaging provider using your own email provider.


3.  The user enters the code into your application.


4.  Your application submits the code back to us for verification.


5.  We return an API response indicating a successful or failed match.

TECHNICAL DETAILS - EMAIL ONE-TIME PASSCODE (OTP) -YOU SEND

2FA Request: API REQUEST - FROM CUSTOMER TO AAPI

Request:

 {"username":"api_user","password":"api_pass","request_type":"2fa_nosend","request_date_time":"2026-05-20 16:13:50","email":"user@example.com","type":"nosend","length":"8","time_limit":"400","universal_id":"UNIID_20260520161350"}

2FA Request: API RESPONSE - FROM AAPI TO CUSTOMER

Response:

 {"username":"api_user", "password":"***********", "responseCode":200, transactionId":"APIREQ_20260520162548", "responseDateTime":"2026-05-20 16:13:50","responseData":{"status":true,"responseCode":467}}

2FA Validate: API REQUEST - FROM CUSTOMER TO AAPI

Request:

 {"username":"api_user", "password":"api_pass", "request_type":"2fa_nosend", "request_date_time":"2026-05-20 16:13:50", "email":"user@example.com", "type":"validate", "code":"39150858", "universal_id":" UNIID_20260520161350"}

2FA Validate: API RESPONSE - FROM AAPI TO CUSTOMER

Response:

 {"username":"api_user", "password":"***********", "responseCode":200, "transactionId":"APIREQ_20260520162548", "responseDateTime":"2026-05-20 16:13:50", "responseData":{"status":true,"responseCode":460}}}

Why Choose Authentication API?

Built for Developers

Simple REST API integration with clear documentation and rapid deployment.   

Secure by Design

OTP codes are generated securely, expire automatically, and can only be used once.  

Scalable

Whether you're validating hundreds or millions of users, Authentication API scales with your business.

Ready to Strengthen Your Authentication?

Authentication API provides APIs that help organizations improve identity verification, reduce fraud, and strengthen authentication workflows. 

Get Started