Programmable SMS gateway

SMS from
your own SIM.

Drop a spare Android in a drawer. Send and receive SMS through your own SIM — no Twilio, no carrier APIs, no per-message fees.

Get Started → ↓ Download App
send-sms.sh
$ curl -s -X POST https://api.signalhouse.live/api/v1/sms/send \
-H "Authorization: Bearer sh_live_xxxx" \
-d '{"to": "+15551234567", "message": "Hello!"}'

{ "status": "queued", "message_id": "msg_abc123" }
setup

Zero to SMS in three steps.

One spare Android, one QR scan. Your gateway is live in under five minutes.

01
📱

Install the APK

Download the Signalhouse gateway app and install it on any spare Android with an active SIM card. No Play Store needed.

↓ Download APK
→
02
⬛

Scan QR to pair

Create an account, open your dashboard, and scan the QR code with the app. Your device registers instantly.

→
03
⚡

Send via API

POST to /api/v1/sms/send. Inbound messages stream back in real time.

View API Docs →
why signalhouse

Your SIM card. Our infrastructure.

A hosted platform that uses your Android as the radio — so messages go out on your number, not a shared carrier pool.

📡

Your SIM, your number

Messages route through your physical device and carrier. No Twilio, no AWS SNS, no surprise invoices.

🔌

Simple REST API

One POST to send, one GET to list. API keys, JSON payloads — everything documented at /docs.

↔

WebSocket live feed

The gateway holds a persistent connection. Commands push to the phone instantly — no polling, no delay.

🔒

Your number, always

Messages send and receive on your SIM. Recipients see your real number — not a rented long-code or shared pool.

Ready to send your first SMS?

Create an account, download the app, scan a QR code. Five minutes flat.

Create Account → Read the Docs