> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://api.docs.modulards.com/modular-ds-public-api/clients/client-contact-methods/update-a-client-s-contact-method/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://api.docs.modulards.com/_mcp/server.

# Update a client's contact method

PATCH https://api.modulards.com/api/public/v1/clients/{client_id}/contact-methods/{contact_method_id}
Content-Type: application/json

Changes the value of a client's contact method. Changing the value lifts a permanent bounce block on the method, if it has one; a temporary rate-limit block stays.

**Body**
- `value` (string, required): at most 255 characters, checked against the method's own channel.

**Errors**
- **404**: the method is reached through another client's address, or through a contact id.
- **422**: `channel` is sent: the channel of a method cannot change.

Reference: https://api.docs.modulards.com/modular-ds-public-api/clients/client-contact-methods/update-a-client-s-contact-method

## Authentication

- `Authorization` header (bearer token, required) — Personal access token created in the Modular DS dashboard; read-only tokens can only call GET endpoints.

## Request

### Path parameters

- `client_id` (string, required)
- `contact_method_id` (string, required)

### Body (application/json)

This endpoint expects an object.

- `value` (string, optional)

## Response

### 200

200 - Method updated

- `data` (ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaData, optional)
- `jsonapi` (ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaJsonapi, optional)

## Types

### ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaData

- `attributes` (ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaDataAttributes, optional)
- `id` (string, optional)
- `type` (string, optional)

### ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaJsonapi

- `version` (string, optional)

### ApiPublicV1ClientsClientIdContactMethodsContactMethodIdPatchResponsesContentApplicationJsonSchemaDataAttributes

- `channel` (string, optional)
- `created_at` (string, optional)
- `updated_at` (string, optional)
- `value` (string, optional)

## Examples

### 200 - Method updated

**Response**

```json
{
  "data": {
    "attributes": {
      "channel": "email",
      "created_at": "2026-08-10T09:00:00.000000Z",
      "updated_at": "2026-09-24T09:25:00.000000Z",
      "value": "alice.new@example.com"
    },
    "id": "301",
    "type": "contact-methods"
  },
  "jsonapi": {
    "version": "1.1"
  }
}
```

**SDK Code**

```python 200 - Method updated
import requests

url = "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id"

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

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

print(response.json())
```

```javascript 200 - Method updated
const url = 'https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id';
const options = {method: 'PATCH', 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 200 - Method updated
package main

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

func main() {

	url := "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id"

	req, _ := http.NewRequest("PATCH", 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 200 - Method updated
require 'uri'
require 'net/http'

url = URI("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")

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

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

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

```java 200 - Method updated
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.patch("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php 200 - Method updated
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PATCH', 'https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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

```csharp 200 - Method updated
using RestSharp;

var client = new RestClient("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id");
var request = new RestRequest(Method.PATCH);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift 200 - Method updated
import Foundation

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PATCH"
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()
```

### Update a client's contact method

**Request**

```json
{
  "value": "alice.new@example.com"
}
```

**Response**

```json
{
  "data": {
    "attributes": {
      "channel": "email",
      "created_at": "2026-08-10T09:00:00.000000Z",
      "updated_at": "2026-09-24T09:25:00.000000Z",
      "value": "alice.new@example.com"
    },
    "id": "301",
    "type": "contact-methods"
  },
  "jsonapi": {
    "version": "1.1"
  }
}
```

**SDK Code**

```python Update a client's contact method
import requests

url = "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id"

payload = { "value": "alice.new@example.com" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript Update a client's contact method
const url = 'https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id';
const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"value":"alice.new@example.com"}'
};

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

```go Update a client's contact method
package main

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

func main() {

	url := "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id"

	payload := strings.NewReader("{\n  \"value\": \"alice.new@example.com\"\n}")

	req, _ := http.NewRequest("PATCH", 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 Update a client's contact method
require 'uri'
require 'net/http'

url = URI("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"value\": \"alice.new@example.com\"\n}"

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

```java Update a client's contact method
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.patch("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"value\": \"alice.new@example.com\"\n}")
  .asString();
```

```php Update a client's contact method
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PATCH', 'https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id', [
  'body' => '{
  "value": "alice.new@example.com"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp Update a client's contact method
using RestSharp;

var client = new RestClient("https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id");
var request = new RestRequest(Method.PATCH);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"value\": \"alice.new@example.com\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Update a client's contact method
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["value": "alice.new@example.com"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.modulards.com/api/public/v1/clients/client_id/contact-methods/contact_method_id")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PATCH"
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()
```