SMS API
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. And, engage in text conversations to solve customer problems faster.
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-marketIntegrate messaging into your application faster than ever, with comprehensive API reference docs and SDKs in your preferred language.
- Unmatched delivery insightOur carrier-grade features provide enhanced deliverability and more granular reporting—giving you detailed, real time insight into message delivery.
Numbers on demand
Global reach
Instantly provision numbers to text globally.
Toll-free SMS
Send SMS updates from branded, memorable numbers.
Short code SMS
High-volume, high throughput texting.
MMS
Send and receive MMS and SMS on the same number.
Alphanumeric sender ID
Increase open rates with a custom sender ID.
Smart content handling
Support for any character set
Every language and emoji.
Long message concatenation
We'll automatically concatenate your long messages.
MMS rich-media support
Send and receive images, gifs or videos.
Opt-out management
Telnyx automatically handles standard opt-out replies.
Message queuing
Automatic queueing to send texts at a compliant rate.
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.
- Learn more
SMS notifications
Integrate two-way texting to manage all your customer inquiries, rescheduling and critical updates, all from your office phone number. - Learn more
Text appointment reminders
Empower patients or customers to manage appointments through two-way SMS prompts to reduce no-shows. - Learn more
Two Factor Authentication
Build a custom experience, using secure SMS codes to verify user account credentials and keep your data safe. - Learn more
SMS marketing
Automate customer retention and prospect marketing efforts with dynamic campaigns based on custom audience segmentation.
See our SMS API Pricing
Customers typically save 30% by switching to Telnyx, with lower list pricing and automatic volume discounts.See PricingStarting at $0.004 to send or receive SMS.
Messaging that delivers.
Reach anyone, anywhere
SMS with global reach. 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 30+ 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.Competitive pricing
Telnyx maintains a high degree of control over our network and phone numbers, and is committed to minimising unnecessary markups and middle-men.
Ready to get started?
Questions on setup? Talk to our experts
Frequently Asked Questions
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).
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.
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.
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.
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.
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.
Yes, Telnyx supports rich media texting (MMS), so you can send images, gifs or videos as needed.
Absolutely, shortcodes are perfect for sending and receiving high volume texts. You can find more information about Telnyx shortcode SMS here.
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.
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.