SMS Message API for Android Self-Hosted Gateway
FlixySMS guide
SMS Message API for Android Self-Hosted Gateway: direct answer
An SMS message API for an Android gateway is an endpoint that receives application requests and sends texts through a connected phone.
Key facts
- The send endpoint accepts recipient number, message text, optional device_id, and optional media_url for WhatsApp devices.
- The bulk endpoint returns message IDs and summary stats such as total, valid, invalid, and queued.
- Status checks identify whether a specific message has been delivered or failed.
- Using a phone-based gateway keeps sender identity close to the business number customers already know.
- This guide was published on May 21, 2026 and has an estimated 2-minute reading time.
Process
- 1Connect the Android gateway and verify device readiness.
- 2Send a POST request to the message endpoint with the recipient and text.
- 3Capture the response IDs for logging.
- 4Call the status endpoint during support reviews or automated reconciliation.
FlixySMS turns an Android phone into an SMS message API endpoint. Send bulk messages, run auto-responders, and integrate with Shopify or WooCommerce while paying only your regular carrier rate.
TL;DR
FlixySMS runs an SMS message API on your own Android device. Install the app, call the REST endpoint from any script or integration, and send at your existing carrier rate instead of paying per-message fees to Twilio-style providers. Multi-device setups scale throughput, two-way replies trigger auto-responses, and common store platforms connect directly.
FlixySMS converts any Android handset into a working SMS message API endpoint that businesses can call from their own code or connected apps. You install the app once, point your scripts at the local REST endpoint, and start issuing sends without signing up for a carrier-side provider.
Getting started with the Android gateway
Install FlixySMS from the Play Store on a dedicated device that stays powered on and connected to Wi-Fi. The app registers with your existing SIM and begins accepting commands over the local network or through the cloud relay we run for remote access. A single phone processes 30 to 100 messages per minute depending on carrier throttling, which covers most small-to-medium campaigns without extra hardware.
Sending your first request
The REST API accepts standard JSON payloads over HTTPS. Here is a minimal example that queues a single message:
POST https://api.flixysms.com/v1/send
{
"to": "+15551234567",
"body": "Order 48291 has shipped. Track at example.com/48291",
"from": "+15559876543"
}
The response returns a message ID and initial status. Multi-segment messages longer than 160 characters are split automatically with proper concatenation headers so the recipient sees one continuous text.
Integrations that trigger sends
Connect your store so order events fire SMS automatically. Shopify order confirmations and abandoned-cart reminders are configured in two clicks inside the dashboard. WooCommerce users map the same events through a plugin that posts to the same REST endpoint. Google Sheets bulk imports let you load a list of numbers and schedule delivery for a chosen time window. Custom webhooks work for any platform that can POST a JSON payload.
Common webhook fields
- Order ID as a reference
- Customer phone number in E.164 format
- Message template with merge tags
- Optional scheduled timestamp
Two-way conversations and auto-responders
Inbound replies land in the same dashboard and can trigger configured replies. A STOP keyword immediately suppresses future sends for that number. HELP returns your support contact. You can also build simple chatbot flows that ask a question and branch on the reply text.
Delivery tracking and quotas
Every send records carrier status codes and timestamps. Failed messages retry once automatically unless you disable the setting. Check current plan limits on the pricing page; each tier includes a monthly SMS quota that resets on the billing date.
Scaling beyond one device
Add more phones to the same account. The system distributes load across devices so a campaign of several thousand contacts finishes faster. Each additional handset adds its own 30-100 messages per minute capacity without changing your carrier plan.
For full endpoint reference and authentication details visit the API documentation. If you need help choosing a plan or setting up a specific integration, reach us on the contact page.
Learn the step-by-step device setup on the how it works guide. Frequent questions are answered on the FAQ.
Start sending in minutes by signing up at the dashboard.
Frequently Asked Questions
How many SMS per minute can one Android phone send?+
A typical handset handles 30 to 100 messages per minute. Actual speed varies with carrier network conditions and whether concatenation is required for longer texts.
Does FlixySMS charge per message like Twilio?+
No. You use your existing mobile plan. The platform subscription is flat monthly; per-message cost equals your carrier rate spread across the quota.
Can I connect Shopify or WooCommerce?+
Yes. Both platforms support webhooks or native apps that post order events to the FlixySMS REST endpoint for confirmations and abandoned-cart reminders.
How are messages longer than 160 characters handled?+
The API splits them into segments automatically and adds concatenation headers so the recipient phone reassembles the full text.
What happens when a recipient replies STOP?+
The system records the keyword and blocks future sends to that number. You can also configure custom auto-replies for HELP or other terms.
