> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.awork.com/apiv1/client-applications/post-client-applications-register/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.awork.com/_mcp/server.

# Dynamically registers a new OAuth 2.0 client according to RFC 7591.

POST https://api.awork.com/api/v1/clientapplications/register
Content-Type: application/json

Allows unauthenticated access.

Reference: https://developers.awork.com/apiv1/client-applications/post-client-applications-register

## 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 a DynamicClientRegistrationEndpointRequest.

- `redirect_uris` (list of string, optional, nullable)
- `client_name` (string, optional, nullable)
- `token_endpoint_auth_method` (string, optional, nullable)
- `grant_types` (list of string, optional, nullable)
- `response_types` (list of string, optional, nullable)
- `scope` (string, optional, nullable)
- `application_type` (string, optional, nullable)
- `contacts` (list of string, optional, nullable)
- `logo_uri` (string, optional, nullable)
- `client_uri` (string, optional, nullable)
- `policy_uri` (string, optional, nullable)
- `tos_uri` (string, optional, nullable)
- `software_id` (string, optional, nullable)
- `software_version` (string, optional, nullable)

## Response

### 201

Created

- `redirect_uris` (list of string, optional, nullable) — Array of redirection URI strings for use in redirect-based flows.
- `client_name` (string, optional, nullable) — Human-readable name of the client to be presented to the end-user.
- `token_endpoint_auth_method` (string, optional, nullable) — Requested authentication method for the token endpoint.
- `grant_types` (list of string, optional, nullable) — Array of OAuth 2.0 grant types that the client will use.
- `response_types` (list of string, optional, nullable) — Array of OAuth 2.0 response types that the client will use.
- `scope` (string, optional, nullable) — Space-delimited list of OAuth 2.0 scope values.
- `application_type` (string, optional, nullable) — Kind of the application.
- `contacts` (list of string, optional, nullable) — Array of e-mail addresses of people responsible for this client.
- `logo_uri` (string, optional, nullable) — URL that references a logo for the client application.
- `client_uri` (string, optional, nullable) — URL of the home page of the client application.
- `policy_uri` (string, optional, nullable) — URL that the client provides to the end-user with information about how the client uses their data.
- `tos_uri` (string, optional, nullable) — URL that the client provides to the end-user to read about the client's terms of service.
- `software_id` (string, optional, nullable) — A unique identifier string (e.g., a Universally Unique Identifier (UUID)) assigned by the client developer.
- `software_version` (string, optional, nullable) — A version identifier string for the client software identified by software_id.
- `client_id` (string, optional, nullable) — OAuth 2.0 client identifier string.
- `client_secret` (string, optional, nullable) — OAuth 2.0 client secret string. Only provided for confidential clients.
- `client_secret_expires_at` (long, optional) — Time at which the client secret will expire (0 if it doesn't expire).
- `client_id_issued_at` (long, optional) — Time at which the client identifier was issued as seconds since Unix epoch.

## Errors

### 400 Bad Request Error

Bad Request

- `code` (string, required) — The error code.
- `description` (string, required) — The description of the error.
- `link` (string, required) — The link to the API documentation page.
- `details` (list of string, optional, nullable) — A list of details describing the error.
- `validationErrors` (list of ValidationErrorResponse, optional, nullable) — If a validation error occurred, this contains the validation errors for each property.
- `traceId` (string, optional, nullable) — The request trace id for tracking the request.

## Types

### ValidationErrorResponse

The validation error response.

- `property` (string, optional, nullable) — The name of the property that failed validation.
- `message` (string, optional, nullable) — The reason why this property failed validation.

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "redirect_uris": [
    "https://app.ncnstn.com/oauth/callback",
    "https://app.ncnstn.com/oauth/callback-2"
  ],
  "client_name": "NCNSTN Integration",
  "token_endpoint_auth_method": "client_secret_basic",
  "grant_types": [
    "authorization_code",
    "refresh_token"
  ],
  "response_types": [
    "code"
  ],
  "scope": "openid profile email offline_access",
  "application_type": "web",
  "contacts": [
    "carla@ncnstn.com",
    "dev@ncnstn.com"
  ],
  "logo_uri": "https://app.ncnstn.com/logo.png",
  "client_uri": "https://app.ncnstn.com",
  "policy_uri": "https://app.ncnstn.com/privacy",
  "tos_uri": "https://app.ncnstn.com/terms",
  "software_id": "a3f8c3a1-6f1b-4ac7-8cb3-9d4c2b2b8f9f",
  "software_version": "1.0.0",
  "client_id": "dcr_ncnstn_integration_123456",
  "client_secret": "G7g9jK8mP2nR4sT6vY8xZ0wQ",
  "client_secret_expires_at": 0,
  "client_id_issued_at": 1617187200
}
```

**SDK Code**

```python
import requests

url = "https://api.awork.com/api/v1/clientapplications/register"

payload = {}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.awork.com/api/v1/clientapplications/register';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{}'
};

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

```go
package main

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

func main() {

	url := "https://api.awork.com/api/v1/clientapplications/register"

	payload := strings.NewReader("{}")

	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
require 'uri'
require 'net/http'

url = URI("https://api.awork.com/api/v1/clientapplications/register")

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 = "{}"

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

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.awork.com/api/v1/clientapplications/register")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.awork.com/api/v1/clientapplications/register', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.awork.com/api/v1/clientapplications/register");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

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

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.awork.com/api/v1/clientapplications/register")! 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()
```