SMSAPI is a robust integration platform for sending SMS messages and managing contacts through a RESTful API. Enhance your messaging strategies with Relevance AI's intelligent automation and AI Agents, making your communication more effective.



SMSAPI provides a comprehensive platform for SMS messaging and contact management. With Relevance AI, you can leverage these capabilities to create intelligent workflows that enhance communication and engagement.
Instant Message Orchestration
AI agent can instantly trigger and coordinate thousands of personalized SMS messages based on real-time events and user behaviors.
Predictive Engagement Timing
Leverages historical data and behavioral analytics to determine optimal message delivery times for maximum impact and response rates.
Automated Response Analysis
Processes and categorizes message responses in real-time, enabling immediate and contextually appropriate follow-up actions.
Relevance AI seamlessly integrates SMSAPI into your workflows, enabling powerful SMS communication capabilities.
What you’ll need
You don't need to be a developer to set up this integration. Follow this simple guide to get started:
- A Relevance AI account
- An Airtable account with access to the base and table you'd like to use
- Authorization (you'll connect securely using OAuth—no sensitive info stored manually)
Security & Reliability
The SMSAPI integration provides a secure and efficient way to send SMS messages and manage contacts through a RESTful API. Utilizing OAuth authentication, it ensures that only authorized applications can access your SMSAPI functionalities. Relevance AI seamlessly handles API operations (like sending messages, creating contacts, and managing groups) in the background, allowing you to focus on building your application without worrying about errors or formatting issues.
With built-in validation and support for international phone number formats, the integration guarantees that your SMS communications are reliable and effective. Whether you're sending single messages or group communications, SMSAPI's robust features simplify the process, ensuring smooth operation and optimal performance.
No training on your data
Your data remains private and is never utilized for model training purposes.
Security first
We never store anything we don’t need to. The inputs or outputs of your tools are never stored.

To get the most out of the SMSAPI + Relevance AI integration without writing code:
- Start with a clear contact list: Ensure phone numbers are validated and formatted correctly in international format.
- Utilize message templates: Create reusable message templates for common communications to streamline your messaging process.
- Connect securely: Make sure to use OAuth credentials securely and verify permissions during setup.
- Test messages before scaling: Send test messages to a small group to ensure everything works as expected before launching to a larger audience.
- Monitor usage and limits: Keep an eye on your API call limits and implement rate limiting to avoid throttling issues.