SMS API for Android phones

An SMS API on an Android phone works by turning the device into the core gateway that handles all outbound and inbound messages through your existing mobile plan. FlixySMS installs on the handset and exposes endpoints so external systems can trigger sends without carrier-based pricing layers.

Getting started with the Android SMS gateway

Install the app from the official site and connect it to your Google account for initial setup. The phone then registers with the platform and begins accepting API calls over a secure tunnel.

After the first sync, test a single message to confirm delivery. Typical Android handsets handle 30 to 100 SMS per minute depending on carrier throttling, which gives a concrete baseline before scaling to multiple devices.

How it Works explains the full device registration flow and the steps to add a second handset for parallel sending.

API documentation and first request

The API Documentation lists every endpoint with request examples. A basic send call looks like this:

POST /v1/sms/send
Content-Type: application/json
{
  "to": "+15551234567",
  "message": "Order #48291 shipped from warehouse 3",
  "from": "+15559876543"
}

Response includes a message ID and delivery status code. Multi-segment messages over 160 characters receive automatic concatenation headers so the recipient sees one continuous text.

Integrations with common platforms

Connect FlixySMS to Shopify for order confirmations and abandoned-cart reminders. The same setup works with WooCommerce when an order event fires. Google Sheets serves as a simple source for bulk import lists that the platform can pull on schedule.

Custom webhooks let any internal tool post a payload that triggers an immediate SMS. These four named integrations cover most e-commerce and operations needs without extra middleware.

Two-way conversations and auto-responders

Inbound messages arrive in the dashboard and can fire a configured reply. Common patterns include STOP or HELP keyword handling for compliance and instant opt-in confirmations. The feature also supports simple chatbot flows that keep the conversation on the same thread.

FAQ covers the exact keyword list and how to edit response templates without touching code.

Pricing and cost comparison

Traditional carriers bill $0.0075 to $0.05 per message. FlixySMS routes everything over your current phone plan, so the marginal cost equals the subscription divided by total messages sent.

Check current quotas on the Pricing page. Plans scale from Free through Enterprise with monthly SMS allowances that reset on the billing date.

| Plan | Monthly SMS Quota | Devices Allowed |\ API Rate Limit |\ |------------|-------------------|-----------------|----------------| | Free | 500 | 1 | 10/min | | Pro | 5000 | 2 | 60/min | | Business | 25000 | 5 | 100/min |

Scaling beyond one device

Add more phones to increase throughput. Each additional handset runs its own connection and the system load-balances automatically. A three-phone cluster routinely reaches 200-300 SMS per minute while still using the same flat subscription.

Dashboard shows real-time throughput per device and alerts when any handset hits carrier limits.

Delivery tracking and reporting

Every message carries a unique ID that the platform polls for final status. Failed sends receive retry logic up to three attempts before logging as undelivered. Reports export in CSV format with timestamps, carrier codes, and segment counts.

Limitations to consider

The Android phone must stay powered on and connected to the internet. Carrier throttling still applies, and some networks block high-volume patterns during peak hours. FlixySMS does not provide its own phone numbers; you continue using the SIM already in the device.

Next steps

Sign up at the Dashboard to create your first project and generate an API key. Review the full setup guide on How it Works before moving to production traffic.