Your Phone. Your SIM. Your SMS API.

SimGate is a developer tool that lets you send and receive SMS over API using any Android phone with a SIM card. Now it also lets you automate inbound SMS with rules, auto-replies, and webhooks. No per-message fees or third-party gateways. Just your device, full control, and a clean HTTP API.

Simple HTTP API • Inbound webhooks • SMS automations • No hidden SMS fees

Privacy by default

The SMS content you send through SimGate is never stored in our databases.

Your message is relayed to your phone for delivery, not archived on our side.

Free to start • No credit card required

Send an SMS With a Single API Call

Your Frontend or Backend

→

🌐 SimGate API

→

📱 Your Android Phone

→

SMS Sent

cURL

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curl -X POST https://api.simgate.app/v1/sms/send
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  -H "x-api-key: YOUR_API_KEY"
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  -H "Content-Type: application/json"
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  -d '{
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    "deviceId": "android-5q15b182f2704gbz",
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    "phoneNumber": "+1234567890",
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    "message": "Hello from SimGate API!"
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  }'

Connect your Android phone

Install the SimGate Gateway app, connect your device, and keep it online.

Send one API request

Your backend or frontend calls SimGate with the recipient and message.

Deliver through your SIM

Your phone sends the SMS through its own carrier connection and number.

Use SimGate from any backend, frontend, or automation script. No SDKs, no middlemen. Just a clean HTTP call and your message is delivered.

Outbound

Send SMS from your own number

Call the SimGate API and your connected Android phone sends the SMS through its own SIM.

Inbound

Receive SMS and trigger automation

When your device gets a new SMS, SimGate can auto-reply, deliver a webhook, and log what happened.

Automation

Turn inbound SMS into replies, webhooks, and follow-up actions

Build SMS rules directly inside SimGate. Match the messages you care about, reply from the same device, forward structured events to your backend, and review recent automation activity without wiring up a separate workflow tool.

Match

Filter inbound SMS with simple rules

Trigger only on the messages that matter using text match, sender filters, and device selection.

Respond

Auto-reply from the same SIM

Send an SMS response back to the sender without routing through another provider or workflow tool.

Forward

Call your webhook and inspect every run

Fan matched messages out to your backend and review reply and webhook status from automation logs.

Example flow

Inbound SMS

A message like "YES" reaches your Android device

Rule match

SimGate checks text, sender, and selected device conditions

Actions

Send an auto-reply, trigger your webhook, and record the result

Built for

Keyword opt-ins and confirmations

Lead routing and CRM sync

Support acknowledgements and auto-replies

Internal alerts pushed to your own backend

See SimGate in action

READY TO CONNECT

This is how the mobile gateway should look when it is healthy and ready to connect

After you install the SimGate Gateway Android app, this is the readiness screen you should see. When the app shows this state, the Connect button can be pressed to bring the device online.

SimGate Gateway mobile app showing a properly connected Android device ready to send and receive SMS

Community

Join our Discord community

Help shape SimGate, share feedback, ask questions, and tell us what would make the gateway more useful for your workflow.

Join Discord

Questions? Reach us at [email protected]