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> For a complete documentation index, see https://docs.send-2.com/send-2-sms-api/send-sms/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.send-2.com/_mcp/server.

# Send SMS

POST https://sms.send-2.com/v1/message
Content-Type: application/json

Reference: https://docs.send-2.com/send-2-sms-api/send-sms

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Body (application/json)

This endpoint expects an object.

- `phone` (string, required) — MPESA hashed phone (e.g. 8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d) or standard international format (e.g. +254722000000)
- `text` (string, required) — The SMS message content
- `sender` (integer, required) — The numeric sender ID assigned to your account

## Response

### 200

OK

- `success` (boolean, required)
- `message` (string, required)
- `data` (V1MessagePostResponsesContentApplicationJsonSchemaData, required)

## Errors

### 406 Not Acceptable Error

Not Acceptable

- `success` (boolean, required)
- `message` (string, required)

## Types

### V1MessagePostResponsesContentApplicationJsonSchemaData

- `id` (string, required)
- `status` (string, required)
- `units` (integer, required)

## Examples

### Success: using MPESA hashed phone

**Response**

```json
{
  "success": true,
  "message": "Processed",
  "data": {
    "id": "01ksm2b4y5ttaca57a66f5aw81",
    "status": "Sent",
    "units": 1
  }
}
```

**SDK Code**

```python Success: using MPESA hashed phone
import requests

url = "https://sms.send-2.com/v1/message"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.json())
```

```javascript Success: using MPESA hashed phone
const url = 'https://sms.send-2.com/v1/message';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Success: using MPESA hashed phone
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://sms.send-2.com/v1/message"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Success: using MPESA hashed phone
require 'uri'
require 'net/http'

url = URI("https://sms.send-2.com/v1/message")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java Success: using MPESA hashed phone
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://sms.send-2.com/v1/message")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php Success: using MPESA hashed phone
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://sms.send-2.com/v1/message', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp Success: using MPESA hashed phone
using RestSharp;

var client = new RestClient("https://sms.send-2.com/v1/message");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift Success: using MPESA hashed phone
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://sms.send-2.com/v1/message")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### Success: using numeric phone number

**Response**

```json
{
  "success": true,
  "message": "Processed",
  "data": {
    "id": "01ksm2b4y5ttaca57a66f5aw81",
    "status": "Sent",
    "units": 1
  }
}
```

**SDK Code**

```python Success: using numeric phone number
import requests

url = "https://sms.send-2.com/v1/message"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.json())
```

```javascript Success: using numeric phone number
const url = 'https://sms.send-2.com/v1/message';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Success: using numeric phone number
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://sms.send-2.com/v1/message"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Success: using numeric phone number
require 'uri'
require 'net/http'

url = URI("https://sms.send-2.com/v1/message")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java Success: using numeric phone number
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://sms.send-2.com/v1/message")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php Success: using numeric phone number
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://sms.send-2.com/v1/message', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp Success: using numeric phone number
using RestSharp;

var client = new RestClient("https://sms.send-2.com/v1/message");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift Success: using numeric phone number
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://sms.send-2.com/v1/message")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### Using MPESA hashed phone

**Request**

```json
{
  "phone": "8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
}
```

**Response**

```json
{
  "success": true,
  "message": "Processed",
  "data": {
    "id": "01ksm2b4y5ttaca57a66f5aw81",
    "status": "Sent",
    "units": 1
  }
}
```

**SDK Code**

```python Using MPESA hashed phone
import requests

url = "https://sms.send-2.com/v1/message"

payload = {
    "phone": "8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d",
    "text": "Hello, your OTP is 123456",
    "sender": 12345
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Using MPESA hashed phone
const url = 'https://sms.send-2.com/v1/message';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"phone":"8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d","text":"Hello, your OTP is 123456","sender":12345}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Using MPESA hashed phone
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://sms.send-2.com/v1/message"

	payload := strings.NewReader("{\n  \"phone\": \"8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Using MPESA hashed phone
require 'uri'
require 'net/http'

url = URI("https://sms.send-2.com/v1/message")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone\": \"8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}"

response = http.request(request)
puts response.read_body
```

```java Using MPESA hashed phone
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://sms.send-2.com/v1/message")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone\": \"8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}")
  .asString();
```

```php Using MPESA hashed phone
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://sms.send-2.com/v1/message', [
  'body' => '{
  "phone": "8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp Using MPESA hashed phone
using RestSharp;

var client = new RestClient("https://sms.send-2.com/v1/message");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"phone\": \"8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Using MPESA hashed phone
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "phone": "8556a495c390f3ba95d2bdf6d06436f2fd09f516531f0a7cd9591c60812fa46d",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://sms.send-2.com/v1/message")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### Using numeric phone number

**Request**

```json
{
  "phone": "+254722000000",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
}
```

**Response**

```json
{
  "success": true,
  "message": "Processed",
  "data": {
    "id": "01ksm2b4y5ttaca57a66f5aw81",
    "status": "Sent",
    "units": 1
  }
}
```

**SDK Code**

```python Using numeric phone number
import requests

url = "https://sms.send-2.com/v1/message"

payload = {
    "phone": "+254722000000",
    "text": "Hello, your OTP is 123456",
    "sender": 12345
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Using numeric phone number
const url = 'https://sms.send-2.com/v1/message';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"phone":"+254722000000","text":"Hello, your OTP is 123456","sender":12345}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Using numeric phone number
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://sms.send-2.com/v1/message"

	payload := strings.NewReader("{\n  \"phone\": \"+254722000000\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Using numeric phone number
require 'uri'
require 'net/http'

url = URI("https://sms.send-2.com/v1/message")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone\": \"+254722000000\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}"

response = http.request(request)
puts response.read_body
```

```java Using numeric phone number
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://sms.send-2.com/v1/message")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone\": \"+254722000000\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}")
  .asString();
```

```php Using numeric phone number
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://sms.send-2.com/v1/message', [
  'body' => '{
  "phone": "+254722000000",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp Using numeric phone number
using RestSharp;

var client = new RestClient("https://sms.send-2.com/v1/message");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"phone\": \"+254722000000\",\n  \"text\": \"Hello, your OTP is 123456\",\n  \"sender\": 12345\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Using numeric phone number
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "phone": "+254722000000",
  "text": "Hello, your OTP is 123456",
  "sender": 12345
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://sms.send-2.com/v1/message")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```