RingCentral C# Client
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RingCentral Developers is a cloud communications platform which can be accessed via more than 70 APIs. The platform's main capabilities include technologies that enable: Voice, SMS/MMS, Fax, Glip Team Messaging, Data and Configurations.

API Reference and APIs Explorer.

RingCentral C# client.

Notice: any issues or questions, please do let me know by creating an issue.

Feel free to ⭐️ and 🍴 this repository.


Install-Package RingCentral.Client

API Reference

RingCentral API Reference is where you can find all the endpoints, requests, parameters and all kinds of necessary details.

Please note: as a guest reader, you can only read the basic version of API Reference. Please do login if you want to get information about Advanced API endpoints.


using RingCentral;

rc = new RestClient("clientId", "clientSecret");

By default the clients talk to sandbox server. If you want production server:

rc = new RestClient("clientId", "clientSecret", true);

Or you can specify the server url explicitly:

rc = new RestClient("clientId", "clientSecret", "https://platform.devtest.ringcentral.com");


await rc.Authorize("username", "extension", "password");

If you use direct number as username, leave extension empty.

Auto refresh

By default, there is a background timer calling rc.Refresh() periodically, so the authorization never expires.

But if you would like to call Refresh manually:

rc.AutoRefreshToken = false;

Token Revoke

When you no longer need a token, don't forget to revoke it: rc.Revoke().

Map URI to code

This client library is built around URIs. Please read this part carefully and make sure you get it before continuing.

Let's go to the RingCentral API Reference to find an example.

We can see that the URI pattern is:


An real example of the URI could be:


Let's map the URI above to code:


It's just a one-to-one mapping:


Default ID

The default ID for Restapi is v1.0, the default ID for Account and Extension is ~.

We can omit arguments to use default value:


You can also break it into multiple lines if you don't like long-chained method calls:

var account = rc.Restapi().Account();
var extension = account.Extension("130829004");
var callLog = extension.CallLog("ASsQ3xLOZfrLBwM");

Anonymous types vs Pre-defined types

For example, the following line is for sending fax:

var response = await extension.Fax().Post(requestBody, attachments);

To create the requestBody object, you can define it as following:

var requestBody = new FaxPath.PostParameters
    to = new CallerInfo[] { new CallerInfo { phoneNumber = "123456789" } }

Or, you can define it using anonymous types:

var requestBody = new
    to = new object[] { new { phoneNumber = "123456789" } }

Both are OK. The anonymous types approach is shorter while you can take advantages of IDE intellisense with pre-defined types approach. You can choose based on your preferences.

Talk to API Server

var extension = rc.Restapi().Account().Extension();


List all of the inbound call Logs
var callLogs = await extension.CallLog().List(new { direction = "Inbound" });

Or if you prefer the query parameters as a typed model:

var callLogs = await extension.CallLog().List(new CallLog.ListParameters { direction = "Inbound" });

All the HTTP calls are by default async, so you should use the await keyword of C#.

Get a call log by ID
var callLog = await extension.CallLog("ASsQ3xLOZfrLBwM").Get();

You can inspect the attributes of the returned callLog object because it is a model instead of a string:



Send an SMS
var requestBody = new {
    text = "hello world",
    from = new { phoneNumber = phoneNumber },
    to = new object[] { new { phoneNumber = phoneNumber } }
var response = await extension.Sms().Post(requestBody);


Update message status
var requestBody = new { readStatus = "Read" };
var response = await extension.MessageStore(messageId).Put(requestBody);


Delete message by ID
var response = await extension.MessageStore(messageId).Delete();

What if I want plain HTTP without those fancy models?

var endpoint = rc.Restapi().Dictionary().Timezone("6").Endpoint(); // "/restapi/v1.0/dictionary/timezone/6"
var response = await rc.Get(endpoint); // make http request
var statusCode = response.StatusCode; // check status code
var str = await response.Content.ReadAsStringAsync(); // get response string


Sample code

The subscription will renew itself automatically before it expires. In rare cases you might need to renew it manually:

await subscription.Renew();

Send Fax

Sample code

Send MMS

MMS and SMS share the same API endpoint. You can deem MMS as SMS with attachments

Sample code

Binary data

Create/Update profile image

Get message content

Download call recording

Sample code

Exception handling

    await ...
catch (FlurlHttpException fhe)
    string errorMessage = fhe.GetResponseString();
    if (fhe.Call.Response.StatusCode == System.Net.HttpStatusCode.NotFound)
        Console.WriteLine("The resource doesn't exist");


  • RestClient class has EventHandler TokenRefreshed, so that every time token refreshed you can get a notification
  • RestClient class has EventHandler AfterHttpCall, so that after every HTTP call you can a notification

Sample code

The unit test project contains lots of useful code snippets. Such as this test class.



Common issues

You must add a reference to assembly netstandard

Ref: https://github.com/dotnet/standard/issues/542