US
SMS API

Send and receive texts globally with most easy-to-use SMS API.

Build reliable messaging into your application—fast.Why pay more for SMS? See SMS Pricing

Send mission-critical messages with confidence.

  • Reach users at scale wherever they are in the world, with triggered SMS alerts to keep them informed when it counts.
  • Augment existing communications with AI chatbots, automating the most repetitive tasks to reduce operational strain.
  • Engage in text conversations with customers to solve problems faster, and offer support in a way that’s convenient to them.

SMS built for developers.

  • Carrier complexities? Handled.
    Choose from local and toll-free numbers, short code, or alphanumeric sender ID. Telnyx offers a deep number inventory and compliant global communications.
  • Faster go-to-market
    Integrate messaging into your application faster than ever, with comprehensive API reference docs and SDKs in your preferred language.
  • Unmatched delivery insight
    Our carrier-grade features provide enhanced deliverability and more granular reporting—giving you detailed, real time insight into message delivery.

Our latest releases.

Hosted SMSSMS-enable existing voice numbers without changing your existing voice setup or carrier.

Learn more
Twexit APISwitch from Twilio in minutes, with minimal changes to your existing messaging code.

Learn more
Shortcode MMSSend and receive images, gifs or videos over US shortcodes to engage more users, faster.

Coming soon

Better deliverability

Number Pool
Spread message delivery across a group of numbers.

Area-code Geomatch
Send texts from the same area code as the recipient.

Sticky Sender
Send every message to a user from the same number.

Number Lookup
Split landline and mobile numbers programmatically.

Delivery reports
Real-time delivery notification of texts sent globally.

Create the experience you want.

With comprehensive API reference docs, SDKs and guides in your language.

  • SMS notifications

    Integrate two-way texting to manage all your customer inquiries, rescheduling and critical updates, all from your office phone number.

  • Text appointment reminders

    Empower patients or customers to manage appointments through two-way SMS prompts to reduce no-shows.

  • Two Factor Authentication

    Build a custom experience, using secure SMS codes to verify user account credentials and keep your data safe.

  • SMS marketing

    Automate customer retention and prospect marketing efforts with dynamic campaigns based on custom audience segmentation.

Messaging that delivers.

Enterprise-grade reliability, security and compliance at global scale.

  • Reach anyone, anywhere

    Get a message to anyone, anywhere in the world. Choose from local and toll-free numbers, short code, alphanumeric sender ID, or even use your existing voice numbers.

  • Worry-free compliance

    Telnyx is a licensed carrier in 25+ countries, and we can confidently say we’re fully compliant in everything we do. So, your communications are in safe hands.

  • Support you can count on

    Our best-in-class 24/7 NOC support is available by phone and email for every single customer with no spend requirements, so your issues never need to wait until Monday.

  • No-middleman pricing

    Telnyx maintains complete control over our network and phone numbers, so we’re able to cut out the middlemen our competitors depend on—avoiding costly markups.

Ready to get started?

Try it Free

Questions on setup? Talk to our experts

Frequently Asked Questions

What is an SMS API?

An SMS API is a software interface that allows developers to build code that can send and receive SMS messages using an Application Programming Interface (API).


How Do I get started with the Telnyx SMS API?

To get started, sign up for a Portal account, then follow the steps in our quickstart guide to buy an SMS-enabled number, create a messaging profile and start sending text messages.


How does an SMS API work?

An SMS API works by allowing developers to simply connect our external SMS interface into your existing infrastructure, to enable a smooth passing of commands and responses from your application to the interface and back for sending and receiving of SMS anywhere in the world.


How much does SMS cost using the Telnyx API?

Telnyx offers market-leading prices for feature-rich SMS, starting at just $0.0025 to send an SMS on a local number, and they’re free to receive. You can find detailed pricing information here. Telnyx also offers even greater discounts as you scale, or when you’re ready to commit to monthly usage—talk to our sales team about your specific needs.


Does Telnyx provide SDKs?

Yes, we provide SDKs in Python, Java, Node, Ruby, .NET and PHP, with more coming soon. These API wrappers help make cut down integration, so you can get to market faster.

Is there support for sending bulk SMS?

Telnyx has the ability to scale with you and supports large scale and broadcast messaging, just make sure your messages follow the Telnyx Acceptable Use Policy.


Can I send images or videos via the Telnyx SMS API?

Yes, Telnyx supports rich media texting (MMS), so you can send images, gifs or videos as needed.


Can I send texts via short code on the Telnyx SMS API?

Absolutely, shortcodes are perfect for sending and receiving high volume texts. You can find more information about Telnyx shortcode SMS here.


What is an alphanumeric sender ID?

An alphanumeric sender ID lets you send messages using a custom ID constructed from a combination of alpha (a-z, A-Z) and numeric (0-9) characters as well as spaces. This makes the sender identifiable to the receiver, as companies can set their brand name as the ID (e.g., TELNYX). It's commonly used for sending one-way text messages, as the person receiving the message will be unable to reply with an Alphanumeric Sender ID.


What use-cases does the Telnyx SMS API support?

You integrate messaging into a range of different applications Telnyx voice API—these include two-factor authentication, SMS marketing, political campaigns, customer support and many more.

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