> For a complete page index, fetch https://docs.synthflow.ai/llms.txt. For full documentation content, fetch https://docs.synthflow.ai/llms-full.txt.

# Attach phone numbers to an outbound agent

PUT https://api.synthflow.ai/v2/assistants/{model_id}/phone_numbers
Content-Type: application/json

Attach multiple outbound phone numbers to an agent by phone numbers or by slugs.

Reference: https://docs.synthflow.ai/api-reference/platform-api/agents/attach-phone-numbers-to-assistant

## Authentication

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

## Servers

- `https://api.synthflow.ai/v2` (Global, default)
- `https://api.us.synthflow.ai/v2` (United States)
- `https://api.eu.synthflow.ai/v2` (European Union)

## Request

### Path parameters

- `model_id` (string, required) — Agent ID. You can find it on the agent’s page in your dashboard.

### Body (application/json)

This endpoint expects an attach-phone-numbers-to-assistant_Request.

- `attach-phone-numbers-to-assistant_Request`

## Response

### 200

200

- `status` (string, optional)

## Errors

### 404 Not Found Error

404

- `detail` (AssistantsModelIdPhoneNumbersPutResponsesContentApplicationJsonSchemaDetail, optional)

## Types

### AttachPhoneNumbersToAssistantRequest0

- `phone_numbers` (list of string, required) — Phone numbers array.

### AttachPhoneNumbersToAssistantRequest1

- `phone_number_slugs` (list of string, required) — Phone number slugs.

### AssistantsModelIdPhoneNumbersPutResponsesContentApplicationJsonSchemaDetail

- `status` (string, required)
- `description` (string, required)
- `request_id` (string, required)
- `category` (string, required)

## Examples

### attach-phone-numbers-to-assistant_example

**Response**

```json
{
  "status": "ok"
}
```

**SDK Code**

```python attach-phone-numbers-to-assistant_example
import requests

url = "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

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

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

print(response.json())
```

```go attach-phone-numbers-to-assistant_example
package main

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

func main() {

	url := "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

	req, _ := http.NewRequest("PUT", 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 attach-phone-numbers-to-assistant_example
require 'uri'
require 'net/http'

url = URI("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")

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

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

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

```java attach-phone-numbers-to-assistant_example
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.put("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```csharp attach-phone-numbers-to-assistant_example
using RestSharp;

var client = new RestClient("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers");
var request = new RestRequest(Method.PUT);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift attach-phone-numbers-to-assistant_example
import Foundation

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
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()
```

### Attach by phone numbers

**Request**

```json
{
  "phone_numbers": [
    "+16286666348",
    "+12131231214"
  ]
}
```

**Response**

```json
{
  "status": "ok"
}
```

**SDK Code**

```python Attach by phone numbers
import requests

url = "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

payload = { "phone_numbers": ["+16286666348", "+12131231214"] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```go Attach by phone numbers
package main

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

func main() {

	url := "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

	payload := strings.NewReader("{\n  \"phone_numbers\": [\n    \"+16286666348\",\n    \"+12131231214\"\n  ]\n}")

	req, _ := http.NewRequest("PUT", 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 Attach by phone numbers
require 'uri'
require 'net/http'

url = URI("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone_numbers\": [\n    \"+16286666348\",\n    \"+12131231214\"\n  ]\n}"

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

```java Attach by phone numbers
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.put("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone_numbers\": [\n    \"+16286666348\",\n    \"+12131231214\"\n  ]\n}")
  .asString();
```

```csharp Attach by phone numbers
using RestSharp;

var client = new RestClient("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers");
var request = new RestRequest(Method.PUT);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"phone_numbers\": [\n    \"+16286666348\",\n    \"+12131231214\"\n  ]\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Attach by phone numbers
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["phone_numbers": ["+16286666348", "+12131231214"]] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
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()
```

### Attach by slugs

**Request**

```json
{
  "phone_number_slugs": [
    "16286666348",
    "1231242151"
  ]
}
```

**Response**

```json
{
  "status": "ok"
}
```

**SDK Code**

```python Attach by slugs
import requests

url = "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

payload = { "phone_number_slugs": ["16286666348", "1231242151"] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```go Attach by slugs
package main

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

func main() {

	url := "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers"

	payload := strings.NewReader("{\n  \"phone_number_slugs\": [\n    \"16286666348\",\n    \"1231242151\"\n  ]\n}")

	req, _ := http.NewRequest("PUT", 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 Attach by slugs
require 'uri'
require 'net/http'

url = URI("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone_number_slugs\": [\n    \"16286666348\",\n    \"1231242151\"\n  ]\n}"

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

```java Attach by slugs
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.put("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone_number_slugs\": [\n    \"16286666348\",\n    \"1231242151\"\n  ]\n}")
  .asString();
```

```csharp Attach by slugs
using RestSharp;

var client = new RestClient("https://api.synthflow.ai/v2/assistants/model_id/phone_numbers");
var request = new RestRequest(Method.PUT);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"phone_number_slugs\": [\n    \"16286666348\",\n    \"1231242151\"\n  ]\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Attach by slugs
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["phone_number_slugs": ["16286666348", "1231242151"]] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.synthflow.ai/v2/assistants/model_id/phone_numbers")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
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()
```