The sms-api-server is a web server that connects to an SMSC via SMPP v3.4. It provides HTTP and WebSocket APIs for sending short messages and querying their status (when supported by the SMSC). It supports sending delivery receipts via WebSockets or Server-Sent Events.

Developers can build the source code and run. For everyone else, the easiest way to run is via Docker:

docker run --rm -i -t fiorix/sms-api-server [--help]

See this link on the Docker hub for details.

With the server running, send a message:

curl localhost:8080/v1/send -X POST -F src=bart -F dst=lisa -F text=hi

In case of success, the server returns a JSON document containing a message ID that can be used for querying its delivery status later. This functionality is not always available on some SMSCs.

Example:

curl "localhost:8080/v1/query?src=bart&message_id=1234"

To watch for incoming SMS, or delivery receipts:

curl localhost:8080/v1/sse

This is the Server-Sent Events (SSE) endpoint that deliver messages as events, as they arrive on the server.

The /v1/send endpoint supports the following parameters:

• src: number of sender (optional)
• dst: number of recipient
• text: text message, encoded as UTF-8
• enc: text encoding for short message: latin1 or ucs2 (optional)
• register: register for delivery: final or failure (optional)

If an encoding is not provided, data is sent as a binary blob and may not display correctly on some devices.

For special characters, try:

curl localhost:8080/v1/send -X POST -F dst=foobar -F enc=ucs2 -F text="é nóis"

This server provides two websocket APIs:

• One for sending messages and querying for message status
• One for sending delivery receipts

See index.html for details.

Have fun!