SMS API

Global engagement powered by the most reliable SMS API

No need to build your SMS program with endless integrations or complex coding. Get started fast and send global SMS messages effortlessly with our robust API and in-depth SDKs.
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Join over 150,000 businesses, including 8 of the 10 largest tech companies in the world

Rely on the most robust and secure CPaaS platform

Unbeatable engagement

Get 100% reach, a 98% open rate, and a 90% read rate on a channel customers already use! 

Best-in-class deliverability

With 600+ direct carrier connections, 100% platform uptime, and the lowest latency out there, we ensure quick and reliable SMS delivery, anywhere! 

Limitless global scalability

Expand your reach to new markets with ease. We ensure your SMS communications are compliant and secure, wherever you’re sending to.  
                                

                                    curl -X POST \
     -H "Authorization: Bearer {token}" \
     -H "Content-Type: application/json"  -d '
      {
          "from": "12345",
          "to": [
              "123456789"
          ],
          "body": "Hi there! How are you?"
      }' \
  "https://eu.sms.api.sinch.com/xms/v1/{service_plan_id}/batches"

​

Integrate SMS in no time

Create an account and start building in minutes! Easy integration and expert documentation make it simple to use our SMS API to boost your business.  

There’s no credit card needed — just sign up, get a virtual test number, and start testing for free! Our APIs and SDKs are waiting for you, with documentation available for Java, PHP, Node, .NET Core, and REST API! 
See documentation
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“Our work with Sinch began in 2008 and is vital in delivering not just messages, but on our promise of meeting customers where they want to be met.”

Kelly Kaminskas

Digital and Retail President, FirstBank

Read the customer story
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Try our comprehensive SMS API!

Need to send alerts, pin codes, reminders, promotions, or other transactional messages? Whatever the situation, our global SMS messaging service offers just the right option and ensures you’re relevant and timely.  No matter your needs, we’ll have you send your first SMS in no time!  Never worry about bill-shock again. Our transparent, flexible, and competitive pricing ensures a surprise-free sending experience. 
SMS Pricing
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Explore our SMS features

1 and 2-way SMS

We support all your SMS communication use cases, whether you need one-way notifications or two-way conversational messaging. 

Smart routing

Our smart routing engine prioritizes for cost and speed of message delivery to suit your needs.

Local numbers

Get access to a secure, carefully-tested inventory of virtual local numbers and short codes.

Delivery and performance reports

Make data-driven decisions with hands-on, detailed reports on message delivery, service performance, and user engagement.

Phone number lookup

Verify phone numbers to reduce undelivered messages, increase security, and stay compliant.

Message scheduling and expiry

Schedule message deliveries and set message validity periods – such as expiry dates – for time-sensitive messages.

Opt-in and opt-out support

Stay compliant and keep users happy by letting them opt in and out effortlessly.

Brand customization

Use your brand as the sender name for messages and include landing page URLs to drive traffic to your website.

Number masking

Mask phone numbers to protect user privacy upon request.

Message automation

Easily automate message sending based on triggers, user actions, or schedules.

Regulatory guidelines

Access country-specific and regulatory guidelines through a user-friendly dashboard.

SMS fallback

Failover to SMS when other communication channels fail and ensure critical messages always get delivered.

Got questions? We’ve got answers!

A cloud-based SMS service is provided to clients on demand over the internet from the cloud computing provider’s servers (hardware). So, there’s no need for the client to have their own on-premises servers to host and run the software, making for greater ease of use.
It’s easy! Sinch can help you set it up, and our technical support team is here for you every step of the way. Increasing engagement through a medium that never leaves your customers’ side is just as simple. With open rates of over 90%, SMS messaging makes sure that offers, invites, reminders, and notifications are delivered and acted on.
You’ll need to purchase an inbound SMS number to receive replies. If you already have a Sinch SMS account, please contact customer support or your Account Manager, and we’ll help you get this sorted.

For text messages that need to be delivered immediately, you need an SMS service with low latency. Two-factor authentication, banking, or ticketing applications are just some examples of messages where instant delivery is essential to the end user. 

For every SMS or MMS sent with Sinch’s REST API, we receive information about the message delivery status from the message carriers. This information is then made available to you in our delivery reports for easy analysis and strategy adjustment.

Yes, you can! Just make sure that you’re using the right country codes when uploading international numbers so that they’re routed correctly. Please be aware that because messages are charged per network and destination, costs may vary on messages sent internationally.

A single SMS API to power all your use cases

Notifications and alerts

Deliver critical information, delivery updates, or appointment reminders customers will see instantly.

Customer care

Transform customer service by providing quick, helpful support on a convenient channel.

Conversational engagement

Enable meaningful, real-time conversations that deepen relationships with customers.

Identity and verification

Deliver SMS one-time passcodes quickly and reliably to verify users seamlessly.

The one-stop shop for all SMS services

MMS

Level up your customer experience and set your brand apart with rich, compelling messages!
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RCS

Rich Media, guided responses, and an app-like experience, all in the users SMS inbox.
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Rich SMS

Breathe new life into your SMS messaging campaigns with rich content.
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SMS Verification

Secure login and sign-up, reduce churn and boost revenue with the power of text.
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10DLC

Set up quickly, build trust, and get high delivery rates? You can do it all with 10DLC!
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Number Lookup

Engage the right customers, on the right numbers.
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Toll-Free Numbers

A toll-free SMS number inspires trust & confidence on the receiving end. Sinch toll-free texting makes it easy to engage with more customers!
Learn more

Short Codes

In a messaging campaign your number represents your brand, so why not make it recognizable? Short and sweet!
Learn more

What are you waiting for?

Send a SMS in 5 minutes or less!

Sinch makes it easy!

Build meaningful connections with your customers

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