Build and Automate Two-Way Messaging with Subtext’s SMS API
Power high-throughput, conversational text messaging with ease.
Schedule a Demo
Once you’ve submitted the form, you’ll be able to instantly schedule a time that works best for your demo.
Trusted by
Fast Integration
Plug Subtext’s SMS API into your system in minutes. Our RESTful endpoints and clear documentation make setup seamless, so you can start sending and receiving messages with just a few lines of code.
Two-Way Messaging
Subtext’s API supports real-time inbound and outbound messaging so you can schedule texts, answer replies, or trigger custom automations — all from a single endpoint.
First-Party Data
Subtext’s SMS API lets you collect and manage first-party data. Using subscriber tags, instantly enrich your audience data.
How Does Subtext API Work?
Create a Subtext Account & Generate Your API Key
Get started by signing up and grabbing your unique API key for secure authentication.
Send Messages and Manage All Subscribers
Use Subtext’s REST API to send texts, create broadcasts, and manage your subscriber list — or integrate directly into your existing CRM, marketing automation, or data platform.
Receive and Process Replies
Enable two-way communication that captures incoming messages and automates responses.
Track Delivery, Engagement, and Subscriptions
Monitor message performance, delivery status, and subscriber activity in real time through the API or dashboard.
Connect Subtext to your e-commerce or CMS platform to send automated campaigns — like flash sales, loyalty offers, or new product announcements the moment content goes live
Notifications & Alerts
Keep your audience informed in real time. Connect an RSS feed to push breaking news, publish alerts instantly, or trigger transactional messages directly from your CMS or backend systems.
Creator-Fan DM & Broadcast Messaging
Deliver personalized updates or sponsor promotions automatically — like sending messages to fans when new content drops or when a subscriber hits a milestone.
Retention & Re-Engagement
Use event-based automations to win back subscribers — for example, trigger a “We miss you” message when a user hasn’t engaged in 30 days, or celebrate signup anniversaries with exclusive offers.
Audience Growth & Onboarding
Effortlessly grow your subscriber base by syncing new signups or customers from your existing platforms directly into Subtext.
First-Party Data Collection
Capture audience insights at every interaction. Tag subscribers automatically based on source, behavior, or campaign — and feed that first-party data back into your CRM or analytics stack.
Who's on Subtext?
Premium Subscriber Benefit for Post Sports+ Members Using Subtext API
"Within the context of our premium sports membership, we view Subtext as a unique and stick value proposition to drive both delight and retention."
Iliya Rybchin
Partner at Elixirr Consulting
"I don't see this as a short-term trend but an evolution to where the role of intermediaries, like search engines and social media networks, become less critical to media companies. The move to solutions like Subtext is all about regaining control."
Jessica Mensing
Director, Communications and Digital Initiative Management, LocalIQ
"Subtext is easy to use and manage with multiple accounts. We love that Subtext gives us an immediate and guaranteed monthly touch point for our clients to connect with their customers."
