AT&T SMS API

The SMS API requires free full access and special permission before it can be used. The API is intended for established businesses or organizations to send SMS Shortcode messages to AT&T subscribers within the United States.

Send a message with a single line of code

Our RESTful APIs make sending SMS short code messages a snap.

To look under the hood, try our Sample Apps or Quickstart guide.

With free access to the SMS API, there's no reason to look elsewhere for your messaging needs.

Up to 1 Million Messaging API calls per month are included when you complete your free access

Broadcast up to 50 recipients per API call

Secure platform to protect subscribers from spam

Want to learn more? Dive into the SMS documentation, read the FAQs.

Developers love using the AT&T SMS API!

"The AT&T SMS API fit our needs perfectly. We cut our development time by 25%."

— Chas Ramer, CEO of Street Savings

Short code messaging is one of the easiest ways to increase user engagement, improve customer service, and drive more sales.

Use the AT&T Messaging API for SMS to:

Send alerts & reminders

Help keep your users on track with well-timed, targeted texts.

Offer promotions

Send your most loyal customers exclusive, limited-time deals.

Get instant feedback

Poll your customers about important issues.