Send and receive SMS or MMS globally with the Telnyx Messaging API, our award-winning platform recognized as a leader for its results and ease of use.

Woman responds to text message
Customer Logo Iterable
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Customer Logo Point Blank Political

SMS messaging with confidence

Reach users at scale wherever they are in the world with SMS for marketing campaigns and 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—and engage in text conversations to solve customer problems faster.

Supported number types for SMS are long code including 10DLC, toll-free, alphanumeric sender ID and short code numbers.


SMS API with automated optimization and reporting

Whether it’s detailed, transparent delivery reports or automated delivery optimizations, our billion-scale Messaging API is built to take you from small to massive with ease.

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    Message queuing

    Our automated message queuing is set based on your account limits and the latest industry standards, ensuring maximum throughput without compromising delivery or compliance.

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    Reliable delivery reports

    Measure deliverability with greater transparency than the competition using our detailed reports and debugging tool.

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    Automatic opt-outs

    If a customer replies to a message from the Telnyx API with a “stop word” message (e.g. STOP), Telnyx will automatically unsubscribe them from future sends.

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    Message concatenation

    If a SMS is too long for its destination, our API will automatically separate it into two messages. No more breaking out content into parts—we’ll handle that for you.

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    Use existing numbers to send SMS

    Have an existing, well-known number that you want to send SMS from? With Telnyx Hosted SMS, you can send and receive SMS and MMS without even changing providers.

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    Intelligent message encoding

    We support any character set and language type. Our system automatically chooses the most compact encoding possible, minimizing cost per send.


Developer-friendly, scalable SMS API

Among SMS API providers, Telnyx consistently wins awards for its results and ease-of-use. We take care of the details as you scale, so you don’t have to.


Ranked API for Results and Ease of Use

Reduce costs without reducing results

Through our commitment to value through optimization, our platform and team ensure you get a great deal without sacrificing performance.


Typical savings on Messaging Costs


Start building

Our code is your code.

curl -X POST \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer YOUR_API_KEY" \
  --data '{
    "from": "+13115552368",
    "to": "+13115552367",
    "text": "Hello, world!"
  }' \
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    Messaging API documentation

    Telnyx’s Messaging API supports sending and receiving both SMS and MMS. Check out our award-winning developer docs to find out more.

  • Icon Resources Coding Tutorial

    15 minute code tutorial

    In this tutorial, we show you how to build an SMS appointment reminder service in 15 minutes.

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    Overview: Hosted SMS

    Learn about sending and receiving SMS via an existing number with Telnyx Hosted SMS.

See our SMS API pricing

Customers typically save 30% by switching to Telnyx, with lower list pricing and automatic volume discounts.

Starting at:


Per message

SMS API use cases

We have the ability to offer our services at scale through Telnyx… Telnyx works closely with us, making sure we're always connected and ready to send.
Customer Quote Point-Blank-Political

Hunter Lamirande

Founder, Point Blank Political


Explore more customer stories


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