GetOTP

API

Quickly implement secure OTP authentication flows with minimal code

Overview

GetOTP API simplifies integrating OTP (One-Time Password) workflows into applications. Core endpoints include /otp/send (deliver OTP via SMS, email, or WhatsApp), /otp/verify (validate user-submitted OTP), and /otp/resend (reissue OTPs). Responses are JSON-formatted with clear status codes (200 for success, 4xx for errors like invalid OTP or rate limits). Use cases include user login security, account verification, password reset, transaction confirmation, and two-factor authentication (2FA) setup. It handles OTP generation (6-8 digits) and channel delivery, reducing development time for authentication systems.

Example Integration (JavaScript)

script.js JS


fetch('https://otp.dev/en/docs/')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON response format
Multiple OTP channels (SMS, email, WhatsApp)
Auto OTP generation
Simple verify/resend endpoints
Rate limiting for security
Minimal setup required

Frequently Asked Questions

? Is GetOTP free to use?

Yes, GetOTP offers a free tier with limited OTP transactions per month. Paid plans unlock higher volumes, custom templates, and priority support.

? Does it require an API Key?

Yes, you need to register on the GetOTP platform to get an API key, which must be included in the Authorization header for all requests.

? What is the response format?

All responses are in JSON format, including success confirmations and error messages (e.g., invalid OTP, expired OTP, rate limit exceeded).

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Tool Info

Pricing Freemium

Category Authentication & Authorization

Platform Public API

Pros

⊕ Rapid integration reduces development time
⊕ Supports multiple communication channels
⊕ End-to-end OTP management
⊕ Built-in security features
⊕ Intuitive documentation

Cons

⊖ Requires API key authentication
⊖ Free tier has transaction limits
⊖ Dependent on external delivery providers
⊖ No self-hosted option
⊖ Limited template customization in free tier