Simple RingCentral SMS Integration
One API key. One REST endpoint. Send, receive, and automate SMS using your own RingCentral numbers — from custom apps, Power Automate, Zapier, or any platform that speaks HTTP. No OAuth, no carrier SDKs, no per-message fees.
Your Numbers, Your Control
Bring your own RingCentral account. Keep your numbers, compliance, and deliverability. No shared short codes.
No Per-Message Costs
SMS is already included in your RingCentral plan. Gravity SMS never charges per message sent or received.
One Gateway, Many Apps
Create separate apps for each use case — CRM, internal tools, automations. Each gets its own API key and webhook.
Built for Developers
One API key replaces RingCentral SDKs and OAuth. Send via REST, receive via webhooks or WebSockets. No carrier complexity.
Simple API, powerful results
Skip the RingCentral SDK, OAuth token management, and webhook subscription APIs. Gravity SMS handles all of that — you just call a REST endpoint.
Send SMS
curl -X POST https://api.gravitysms.com/v1/sms/send \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": "+15551234567",
"from": "+15559876543",
"body": "Your order has shipped!"
}'Receive SMS via webhook
// Gravity SMS POSTs to your webhook URL
{
"event": "sms_inbound",
"from": "+15551234567",
"to": "+15559876543",
"body": "Yes, confirm my appointment",
"timestamp": "2026-03-17T14:30:00Z"
}Or connect via WebSocket for real-time events. Works with Zapier, Make, n8n, or any HTTP endpoint.
How it works
Power Automate connector
Trigger flows on inbound SMS and send messages from Power Automate. Works alongside your native RingCentral experience — no disruption to the UI you use today.
Learn more →Coming soon
Automations
Build auto-reply rules, keyword routing, and scheduled messages directly in Gravity SMS — no external tools required. Define triggers and actions from your dashboard and let the gateway handle the rest.
Ready to get started?
Create your account and send your first SMS in minutes. Free 14-day trial.
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