Telesign Documentation

Explore our documentation, then try our products for yourself using our no-code API Explorer or by installing an SDK in your favorite language and following along with one of our tutorials.

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Verification products

Easily deliver multifactor authentication (MFA) anywhere in the world to prevent unauthorized access, account takeovers, and fraud.

Verify API

Build flexible, multichannel verification via a single API.

SMS Verify API

Send a one-time passcode (OTP) via SMS.

Voice Verify API

Send a one-time passcode (OTP) via phone call.

Silent Verify API

Verify an end user via mobile device data associated with their device.

Engagement products

Send secure alerts, reminders, notifications, and marketing messages using your preferred communication channel.

SMS

Send timely, personalized messages through SMS.

Messaging

Enhance your message with RCS, WhatsApp, Viber, and MMS advanced features.

Deactivated Numbers API

Get reports with daily lists of deactivated phone numbers.

Inbound SMS

Receive Mobile Originated (MO) messages sent by your end users.

Number Masking

Create private, time-limited communication without revealing users’ phone numbers.

Voice

Integrate voice communication (one-way or two-way) into web and mobile apps.

Risk & identity products

Receive insights to assess the risk of interactions across your platform.

Intelligence Cloud API

Use an account's phone number to assess the risk of an interaction with them.

Phone ID

Retrieve attributes associated with a phone number to inform decisions about interactions and customer records.

Phone ID Live Status

Check if a phone number is still active, if it can be reached, and whether it is associated with a mobile phone that is roaming.

Protect platform

Interact with digital identity products, features, and services using this adaptive platform.

Flow Builder

Build no-code adaptive fraud protection workflows.

Partnerships - Brings your own telephony services

Okta

Use Telesign no-code telephony inline hook to easily deliver OTPs via SMS and voice.

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Ping Identity

Use Telesign as your telephony provider to easily deliver OTPs and ARNs via SMS and OTPS via voice.

Learn more

Other resources

Authentication

User interface best practices

Tutorials

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All status and error codes

System status

200Success. Your request was fulfilled and a file was retrieved. Note that no response JSON object is returned in the payload, only the contents of the file itself.

401Unauthorized. The request requires user authentication. Customer ID and/or API Key were not provided or were not valid. CodeMeaning2201Unauthorized access.

403Forbidden. This user does not have access to this resource. CodeMeaning2203Request forbidden

404File not found. The file was not available to retrieve. CodeMeaning2204Download failed, the file you are trying to download doesn't exist or may have been deleted.

500Internal server error. There was a problem on our side. Try again later. CodeMeaning2250Internal Server Error