API & Webhooks
You’re building custom SMS experiences — but that doesn’t mean you need to manage carriers, compliance, or infrastructure yourself. Subtext’s API and webhooks give your team full programmatic control over two-way messaging, subscribers, and real-time events, so you can build and scale with confidence.
Two-Way Messaging & Automation
Send messages programmatically based on product events, user actions, or system logic. Use subscriber responses to trigger workflows, update subscriber data, or drive real-time interactions—powering transactional, lifecycle, and conversational messaging at scale.
Subscriber Management
Create, update, and manage subscribers via API, including tags and custom attributes. Keep audience data synchronized across your CRM, product, and internal systems.
Real-Time Webhooks
Receive instant notifications for inbound messages, shortlink clicks, delivery updates, subscriptions, and opt-outs—so your systems stay in sync and workflows trigger automatically.
Compliance & Deliverability
Subtext manages carrier requirements, 10DLC registration, and ongoing compliance to keep your API-driven messaging approved, trusted, and consistently delivered at scale.
Custom Signup Flows
Design fully custom SMS opt-in experiences using your own UI and logic. Capture consent your way while Subtext provides the underlying validation and messaging foundation.
Data & CRM Integrations
Connect Subtext to your CRM, CDP, data warehouse, or internal tools using the API—maintaining a single source of truth for subscriber and engagement data.
Scalable Infrastructure
Rely on an enterprise-grade API built to support high-volume traffic, reliability, and growth without performance tradeoffs.
White-Glove API Support
Get hands-on guidance from Subtext’s team for API implementation, compliance setup, and ongoing optimization—so you can launch faster and scale with confidence.
