GetOTP API

Name: GetOTP API
Brand: GetOTP API
Availability: InStock

✓ Official Vendor SpecCommunicationAuthenticationbearer7 EndpointsREST

For Agents

Send and verify OTP codes via SMS, Viber, Voice, and Telegram: deliver verification codes, validate user submissions, and manage multi-channel authentication workflows.

Connect the GetOTP API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the GetOTP API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Install Jentic One Beta (Self-Hosted)

Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with GetOTP API.

Send OTP codes via SMS, Viber, Voice (flash call or TTS), and Telegram channels

Verify user-submitted OTP codes with expiration and attempt tracking

Manage OTP lifecycle including generation, delivery, validation, and expiration

Track delivery status and retry failed OTP deliveries across channels

GET STARTED

Start building with GetOTP API

Explore with Jentic

View OpenAPI Document

GetOTP is an OTP (One-Time Password) delivery and verification service supporting multiple channels including SMS, Viber, Voice (flash call or TTS), and Telegram. The API enables developers to send verification codes, validate user-submitted OTP codes, and manage OTP workflows for two-factor authentication, account verification, and passwordless login. It provides channel selection, delivery tracking, retry logic, and verification status management for secure identity verification flows.

Use Cases

Patterns agents use GetOTP API for, with concrete tasks.

★ Two-Factor Authentication (2FA)

Add 2FA to login flows by sending OTP codes during authentication. POST /otp/send delivers the code via SMS or other channels, and POST /otp/verify validates the user-submitted code. The API tracks expiration and attempt limits to prevent brute-force attacks. Supports fallback channels if primary delivery fails, ensuring reliable 2FA even with carrier issues.

POST /otp/send with the user's phone number and preferred channel (SMS), then POST /otp/verify with the code the user submits to complete 2FA.

Phone Number Verification

Verify phone numbers during user registration or profile updates. POST /otp/send delivers a verification code, and POST /otp/verify confirms the user owns the phone number. This prevents fake accounts, ensures contact reachability, and supports regulatory compliance for identity verification. Multi-channel support handles international numbers and regional carrier preferences.

POST /otp/send with the phone number during registration, then POST /otp/verify with the submitted code to confirm ownership before activating the account.

Passwordless Authentication

Implement passwordless login by sending OTP codes as the primary authentication method. Users enter their phone number or username, receive an OTP, and gain access upon successful verification. Eliminates password management overhead, reduces credential theft risk, and simplifies login UX. The API's retry logic and multi-channel support ensure reliable delivery.

POST /otp/send with the user's phone number when they request login, then POST /otp/verify with their submitted code to grant access without password.

Transaction Authorization

Secure high-value transactions or sensitive operations by requiring OTP verification. Before processing payments, account changes, or data access, send an OTP and require verification. This adds a real-time authorization layer that confirms user intent and prevents unauthorized actions even if sessions are compromised.

Before processing the transaction, POST /otp/send to the user's registered phone, then POST /otp/verify with their code before completing the sensitive operation.

AI Agent for Authentication Operations

Let an AI agent handle OTP workflows for a SaaS platform — sending verification codes during signup, validating codes during login, and managing retry logic for failed deliveries. Through Jentic, the agent loads only the required operations and GetOTP API keys are injected at execution time.

Use the Jentic search query 'send otp code' to find POST /otp/send, load its schema, and execute with the user's phone number and preferred channel.

Key Endpoints

7 endpoints — getotp is an otp (one-time password) delivery and verification service supporting multiple channels including sms, viber, voice (flash call or tts), and telegram.

METHOD

PATH

DESCRIPTION

POST

/otp/send

Send an OTP code via SMS, Viber, Voice, or Telegram

POST

/otp/verify

Verify a user-submitted OTP code

POST

/otp/resend

Resend an OTP code if the original expired or failed

GET

/otp/{id}

Retrieve OTP delivery status and history

GET

/otp

List OTP sessions with filtering by status or date

POST

/otp/send

Send an OTP code via SMS, Viber, Voice, or Telegram

POST

/otp/verify

Verify a user-submitted OTP code

POST

/otp/resend

Resend an OTP code if the original expired or failed

GET

/otp/{id}

Retrieve OTP delivery status and history

GET

/otp

List OTP sessions with filtering by status or date

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

GetOTP API keys are stored encrypted in the Jentic vault and injected as the Authorization bearer header at execution time. Raw keys never appear in agent prompts or transcripts.

Intent-based discovery

Agents search by intent such as 'send otp code' or 'verify otp' and Jentic returns the matching endpoint with its schema.

Time to first call

Direct GetOTP integration: 1-2 days to model OTP workflows, handle multi-channel delivery, and implement verification logic. Through Jentic: under 1 hour — search, load schema, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

Twilio Verify API

Alternative OTP and verification API with SMS and voice channels.

Choose Twilio Verify for global reach and enterprise features; choose GetOTP for simpler OTP workflows with multi-channel support.

Alternative

Vonage Verify API

Alternative OTP verification API with SMS and voice delivery.

Choose Vonage for carrier-grade verification; choose GetOTP for developer-friendly OTP workflows with Telegram and Viber support.

Complementary

Auth0 API

Full authentication platform that can use GetOTP for phone verification and MFA.

Use Auth0 for complete identity management and GetOTP for the OTP delivery layer in phone verification and 2FA flows.

FAQs

Specific to using GetOTP API through Jentic.

What authentication does the GetOTP API use?

The GetOTP API uses bearer token authentication. API keys are obtained from the GetOTP dashboard and sent via the Authorization header. Through Jentic, keys are stored encrypted and injected at execution time.

What channels does GetOTP support for OTP delivery?

GetOTP supports SMS, Viber, Voice (flash call or TTS), and Telegram. The API automatically handles channel selection and fallback if the primary channel fails.

How long are OTP codes valid?

OTP code expiration is configurable per request, typically 5-10 minutes. The API enforces expiration automatically during verification and tracks attempt counts to prevent brute-force attacks.

Can I customize the OTP code length and format?

Yes, the API supports configurable code length (typically 4-8 digits) and format. You can also customize the message template for SMS and Voice deliveries.

What happens if OTP delivery fails?

The API provides delivery status tracking via GET /otp/{id}. You can retry failed deliveries with POST /otp/resend, optionally specifying a fallback channel. The API also supports automatic fallback to alternative channels.

What are the rate limits for the GetOTP API?

Rate limits depend on your GetOTP plan and are enforced per API key. Check your dashboard for specific limits. The API returns HTTP 429 when limits are exceeded, with Retry-After headers.