SMS API Documentation: Send, Receive & Manage SMS

Hier beginnen

Your first request in four steps

Create an account and copy the API key from the dashboard.

Install the mobile app and confirm that the device is online.

Send one test SMS with the /sendsms/ endpoint.

Store the returned message ID to correlate logs and delivery status.

The secure SMSMobileAPI mobile app connecting a phone to the web dashboard and REST API for SMS and call operations — Encrypted mobile-to-platform connection

Official mobile application

The secure bridge between your phone, dashboard and API.

SMS and call operations pass through the official SMSMobileAPI app installed on your connected phone. The app securely pairs the device with your account, synchronizes authorized events and links the mobile network to the dashboard and REST API.

1Mobile appPairs the phone and its SIM 2Encrypted linkAuthenticates and protects data in transit 3Dashboard & APIControls workflows and activity

Signed releases distributed through the official Google Play and Apple App Store listings
Google and Apple platform review, signing and distribution controls
Secure device pairing, HTTPS transport and authenticated API access
Only the permissions required for the mobile features you enable

Get the official SMSMobileAPI app on Google Play

Download the official SMSMobileAPI app on the Apple App Store

Capabilities depend on the permissions and background access allowed by Android or iOS.

Authentifizierung

Keep credentials on your server

Every request accepts an API key through the apikey parameter. OAuth2 client credentials are also available for server-to-server integrations. Never expose a production key in browser code, public repositories or support messages.

POST · GET

Send an SMS

ENDPOINThttps://api.smsmobileapi.com/sendsms/

Queues a message on a connected phone. POST is recommended when the message is long or contains special characters.

When to use it

Use this for transactional messages, reminders, alerts and application-generated SMS.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`recipients`	phone	Erforderlich	Destination number in international format.
`message`	Zeichenkette	Erforderlich	Message body. URL-encode it when using GET.
`port`	1 \| 2	Optional	SIM port on compatible Android devices; leave empty for automatic selection.
`sIdentifiant`	Zeichenkette	Optional	Specific connected phone SID; leave empty for the first available device.
`shorturl`	0 \| 1	Optional	Set to 1 to shorten URLs found in the message.
`sendsms`	0 \| 1	Optional	SMS channel flag. Defaults to 1 when omitted.
`sendwa`	0 \| 1	Optional	Also request WhatsApp delivery when the account supports it.
`encrypt_message`	Ja	Optional	Encrypt the message for recipient-side protected reading.
`schedule_timestamp`	Unix seconds	Optional	UTC time from which the message may be sent.

Request example

cURL

curl -X POST "https://api.smsmobileapi.com/sendsms/" \
  -d "apikey=YOUR_API_KEY" \
  -d "recipients=+1234567890" \
  --data-urlencode "message=Your appointment is confirmed for tomorrow."

Beispielantwort

JSON

{
  "result": {
    "error": 0,
    "sent": "1",
    "id": "c319d3b35e8f8712cde20dae39ac3c19f86eda25",
    "note": "sent by mobile",
    "datetime": "2026-03-20T21:07:44Z",
    "port": null,
    "send_with_whatsapp": "0"
  }
}

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Good to know

A successful API response means the message was accepted by the platform; keep the returned id for later tracking.
Carrier delivery and mobile processing can happen after the HTTP response.

POST · GET

Eine nicht gesendete SMS erneut senden

ENDPOINThttps://api.smsmobileapi.com/resend/

Retries a message that is currently in an error state.

When to use it

Use this after checking the sent log and confirming that a failed message is eligible for another attempt.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`guid`	Zeichenkette	Erforderlich	The message GUID returned by the send or log endpoint.

Request example

cURL

curl "https://api.smsmobileapi.com/resend/?apikey=YOUR_API_KEY&guid=GUID_OF_THE_MESSAGE"

Beispielantwort

JSON

{
  "result": {
    "error": "0",
    "sms": "resent with successfully",
    "attempt": 1
  }
}

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Good to know

Only messages with an error status can be resent.

ERHALTEN

List SMS sent from the API

ENDPOINThttps://api.smsmobileapi.com/log/sent/sms/

Returns messages submitted through the SMS API with queue, mobile and error information.

When to use it

Use it for delivery monitoring, support diagnostics and reconciliation.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`guid_message`	Zeichenkette	Optional	Return one message by its unique GUID.
`before`	timestamp or reference	Optional	Return messages before the supplied cursor or timestamp.
`error_api`	0 \| 1	Optional	Set to 1 to return API processing errors only.
`error_mobile`	0 \| 1	Optional	Set to 1 to return mobile sending errors only.
`keyword`	Zeichenkette	Optional	Search the recipient number or message text.

Request example

cURL

curl "https://api.smsmobileapi.com/log/sent/sms/?apikey=YOUR_API_KEY&guid_message=MESSAGE_GUID"

Beispielantwort

JSON

{
  "result": {
    "error": "0",
    "sms": [{
      "sIdentifiantPhone": "508b004b4aadacc4",
      "recipients": "+1234567890",
      "sms": "Test message",
      "guid_message": "MESSAGE_GUID",
      "send_from_mobile": 1,
      "error_api": "",
      "send_from_mobile_erreur": ""
    }]
  }
}

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ERHALTEN

List SMS synchronized from a phone

ENDPOINThttps://api.smsmobileapi.com/log/sent/frommobile/

Lists SMS physically sent by a mobile and synchronized with the platform.

When to use it

Use it when messages may originate on the phone as well as through the API.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`date`	JJJJ-MM-TT	Optional	Filter one exact date.
`date_from`	JJJJ-MM-TT	Optional	Start of a date range.
`date_to`	JJJJ-MM-TT	Optional	End of a date range.
`period`	enum	Optional	today, yesterday, last_24h, last_3days or last_7days.
`number`	phone	Optional	Filter by recipient.
`sIdentifiant`	Zeichenkette	Optional	Filter by connected mobile SID.
`message`	Zeichenkette	Optional	Filter by message content.
`search`	Zeichenkette	Optional	Global search across mobile, number, message and timestamps.
`sort_by`	enum	Optional	sIdentifiant, number, message, mobile_date_ms, mobile_date_formatted or synchro_time.
`sort_order`	ASC \| DESC	Optional	Sort direction.
`limit`	integer	Optional	Maximum 200 records.

Request example

cURL

curl "https://api.smsmobileapi.com/log/sent/frommobile/?apikey=YOUR_API_KEY&period=last_7days&limit=200"

Beispielantwort

JSON

{
  "result": {
    "error": "0",
    "count": 1,
    "history_limit_days": 7,
    "sms": [{
      "sIdentifiant": "508b004b4aadacc4",
      "number": "+15551234567",
      "message": "Appointment confirmed.",
      "mobile_date_ms": 1774041004692,
      "synchro_time": "2026-03-20 21:10:05"
    }]
  }
}

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Good to know

Requires Android app 4.1.20 or newer and must be enabled in the app.
This endpoint returns a maximum of seven days of synchronized history.

ERHALTEN

List received SMS

ENDPOINThttps://api.smsmobileapi.com/getsms/

Returns incoming SMS synchronized from connected phones.

When to use it

Use it to build an inbox, poll for replies or recover messages after a webhook interruption.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`sIdentifiantPhone`	Zeichenkette	Optional	Filter by the phone that received the SMS.
`after_timestamp_unix`	Unix seconds	Optional	Return messages received after this timestamp.
`onlyunread`	Ja	Optional	Return only messages not marked as read in API state.

Request example

cURL

curl "https://api.smsmobileapi.com/getsms/?apikey=YOUR_API_KEY&onlyunread=yes"

Beispielantwort

JSON

{
  "result": {
    "error": "",
    "sms": [{
      "id": 466340,
      "sIdentifiantPhone": "508b004b4aadacc4",
      "timestamp_unix": 1774041814,
      "message": "Please call us back.",
      "number": "+15551234567",
      "guid": "6BFD7DC7-3492-422D-8D02-4AF4E614F122",
      "alias": null
    }]
  }
}

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POST · GET

Mark a received SMS as read

ENDPOINThttps://api.smsmobileapi.com/getsms/set-read/

Marks one received message as read in SMSMobileAPI API state.

When to use it

Use this after your application has processed an incoming message.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`guid_message`	Zeichenkette	Erforderlich	GUID of the received SMS.

Request example

cURL

curl "https://api.smsmobileapi.com/getsms/set-read/?apikey=YOUR_API_KEY&guid_message=MESSAGE_GUID"

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Good to know

This does not change the read state inside the phone messaging application.

POST · GET

Update a received SMS alias

ENDPOINThttps://api.smsmobileapi.com/getsms/update/

Adds, changes or clears the alias associated with a received SMS.

When to use it

Use aliases to attach a contact name or application label to a message.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`guid`	Zeichenkette	Erforderlich	GUID of the received SMS.
`alias`	Zeichenkette	Erforderlich	New alias. Send an empty value to clear it.

Request example

cURL

curl "https://api.smsmobileapi.com/getsms/update/?apikey=YOUR_API_KEY&guid=MESSAGE_GUID&alias=John%20Doe"

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POST · GET

Delete SMS server logs

ENDPOINThttps://api.smsmobileapi.com/deletesms/

Deletes SMS records from the SMSMobileAPI server log.

When to use it

Use it for retention workflows or removal of a specific logged message.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`guid_message`	Zeichenkette	Optional	Delete one message by GUID.
`date_start`	JJJJ-MM-TT	Optional	Delete records from this date.
`date_end`	JJJJ-MM-TT	Optional	With date_start, limits the deletion range.

Request example

cURL

curl "https://api.smsmobileapi.com/deletesms/?apikey=YOUR_API_KEY&guid_message=MESSAGE_GUID"

Beispielantwort

JSON

{
  "result": {
    "error": null,
    "count_delete": 1
  }
}

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Good to know

This deletes server log entries only. It does not delete messages stored on the mobile device.
Treat this operation as destructive and verify filters before calling it.

ERHALTEN

SMS-Konversationen auflisten

ENDPOINThttps://api.smsmobileapi.com/conversation/sms/list/

Groups incoming and outgoing messages into conversations by phone number.

When to use it

Use it for chat views, recent conversation widgets and support timelines.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`origineConversation`	received \| sent	Erforderlich	Dataset used to identify the starting conversations.
`numero`	phone	Optional	Return one phone-number conversation.
`date_from`	date or datetime	Optional	Start of the message range.
`date_to`	date or datetime	Optional	End of the message range.
`sort`	ASC \| DESC	Optional	Conversation order; default DESC.
`limit`	integer	Optional	Conversation limit when numero is omitted; default 20.
`resume`	0 \| 1	Optional	Set to 1 to return only the latest messages per conversation.
`resume_line_how`	integer	Optional	Number of messages per conversation when resume=1.

Request example

cURL

curl "https://api.smsmobileapi.com/conversation/sms/list/?apikey=YOUR_API_KEY&origineConversation=received&resume=1&resume_line_how=3"

Beispielantwort

JSON

{
  "success": true,
  "origineConversation": "received",
  "conversations": [{
    "phone_number": "+15551234567",
    "contact_alias": "John Doe",
    "messages": [{
      "direction": "incoming",
      "message_id": "msg_1001",
      "timestamp_utc": "2026-03-13T08:45:12Z",
      "message": "I need more information.",
      "status": "received",
      "mobile_sid": "device_sid_1"
    }]
  }]
}

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ERHALTEN

Liste der verbundenen Mobilgeräte

ENDPOINThttps://api.smsmobileapi.com/gateway/mobile/list/

Lists phones connected to the SMS gateway account.

When to use it

Use it to select a sender, display device status or audit a gateway fleet.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`sid`	Zeichenkette	Optional	Return one exact mobile SID.
`search`	Zeichenkette	Optional	Search SID, date, battery, version, label and related fields.

Request example

cURL

curl "https://api.smsmobileapi.com/gateway/mobile/list/?apikey=YOUR_API_KEY"

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POST · GET

Update a connected mobile

ENDPOINThttps://api.smsmobileapi.com/gateway/mobile/update/

Updates the human-readable label or phone number of a connected device.

When to use it

Use it to keep device labels meaningful in multi-phone installations.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`sid`	Zeichenkette	Erforderlich	The device SID.
`label`	Zeichenkette	Erforderlich	New label; it may be intentionally empty.
`phone_number`	phone	Optional	New phone-number metadata.

Request example

cURL

curl "https://api.smsmobileapi.com/gateway/mobile/update/?apikey=YOUR_API_KEY&sid=DEVICE_SID&label=OfficePhone"

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POST · GET

Ein verbundenes Mobilgerät löschen

ENDPOINThttps://api.smsmobileapi.com/gateway/mobile/delete/

Removes a connected mobile and its gateway history rows.

When to use it

Use only when a phone must be permanently removed from the account.

Parameter

Name	Typ	Requirement	Beschreibung
`apikey`	Zeichenkette	Erforderlich	Your account API key.
`sid`	Zeichenkette	Erforderlich	SID of the device to remove.

Request example

cURL

curl "https://api.smsmobileapi.com/gateway/mobile/delete/?apikey=YOUR_API_KEY&sid=DEVICE_SID"

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Good to know

This operation removes device history associated with the SID. Confirm the device before calling it.

INBOUND POST

Receive SMS by webhook

DESTINATIONYour HTTPS endpoint

SMSMobileAPI sends a JSON request to your configured URL whenever an SMS is received.

When to use it

Use webhooks for real-time processing instead of frequent polling.

Receiver example

PHP 8

<?php
$payload = json_decode(file_get_contents('php://input'), true);
if (!is_array($payload) || empty($payload['guid'])) {
    http_response_code(400);
    exit('Invalid payload');
}
// Queue the event, then acknowledge quickly.
http_response_code(200);
echo 'OK';

Beispielantwort

JSON

{
  "date": "2026-03-20",
  "hour": "10:15:00",
  "time_received": "2026-03-20 10:14:50",
  "message": "Hello, this is a test.",
  "number": "+123456789",
  "guid": "abcde12345"
}

Inbound endpoint

This endpoint receives events at your own HTTPS URL. Use the receiver example above, then send an SMS to your connected phone to test it.

Good to know

Configure the public HTTPS URL in Dashboard → Webhook Settings.
Return HTTP 200 quickly and process the event asynchronously.
Deduplicate retries using guid.

Fehlerbehebung

Errors and safe retries

Read the HTTP status and the JSON error field before retrying. Do not retry validation or authentication failures without correcting the request first.

HTTP	Code	What to do
400	`missing_parameter`	A required parameter is empty or absent. Check the parameter table for the endpoint.
403	`invalid_apikey`	The API key is unknown, expired or not authorized for the requested feature.
429	`too_many_requests`	Requests are arriving too quickly. Wait, then retry with exponential backoff.
500	`server_error`	The service could not complete the request. Keep the response and contact support if it persists.

Retry ruleRetry only transient 429 and 5xx responses. Start after 1 second, then back off to 2, 4 and 8 seconds.

Brauchen Sie Hilfe?

Bring the request context—not your secrets.

Share the endpoint, timestamp, HTTP status and sanitized response. Never include API keys, tokens or private message content.

Contact API support →

SMS API documentation

Your first request in four steps

The secure bridge between your phone, dashboard and API.

Keep credentials on your server

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Errors and safe retries

Bring the request context—not your secrets.