Get Started Fast

Send your first free SMS in under 5 minutes

🚀
100% free to start. Install the Android app, register a device with your own SIM card and send SMS through your own mobile network — no cost, no credit card. Or buy credits to send via cloud providers.

1. Create a free account

Sign up to RCSZilla and access the web panel.

  1. Go to app.rcszilla.com/register and create an account.
  2. Verify your email and log in.
  3. You will be taken to the dashboard.
Screenshot: registration page — fill in the account creation form

2. Install the Android app and register a device (free)

This is the fastest way to send SMS for free — use your own Android phone and SIM card.

📱
The Android app turns your phone into an SMS gateway. Messages are sent through your mobile network — no extra cost beyond your plan.
  1. In the panel, go to Devices > Add Device.
  2. Download the RCSZilla app from Google Play or from the Devices page.
  3. Open the app and scan the QR code shown in the panel.
  4. The device appears as Online within seconds.
Screenshot: Devices page — "Add Device" button highlighted Screenshot: QR code modal shown after clicking "Add Device"
📷 Screenshot: Android app scanning the QR code
Screenshot: device listed as "Online" in the Devices page

3. Send your first SMS

Now that your device is online, send a test message from the panel.

  1. Go to Messages > Send Message.
  2. Enter a phone number and the message text.
  3. Click Send — the message will be dispatched through your Android device.
Send new message — step 1: select recipients Send new message — step 2: write message Send new message — step 3: confirm and send 2-way WhatsApp conversation

4. Buy credits (optional — for cloud sending)

If you do not have an Android device or want to send through cloud providers (Twilio, Vonage, etc.), buy credits.

💡
Credits are optional. Sending through your Android device is always free — credits are only needed for routing through cloud SMS providers.
  1. Go to Billing > Buy Credits.
  2. Choose a package and complete payment.
  3. Credits are applied to your account immediately.

5. Get your API key

Use the API to integrate RCSZilla into your website, CRM, or automation workflows.

  1. Go to Settings > API Key.
  2. Click Generate Key.
  3. Copy the key and use it in the Authorization: Bearer header.
cURLSend your first SMS via API
curl -X POST "https://api.rcszilla.com/?endpoint=queue_sms" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR-API-KEY" \
  -d '{"to":"+40700000000","message":"Hello from RCSZilla","channel":"sms"}'

What's Next