Error - was not found on this server.

You’re getting 404 – Not Found because the YouTube Analytics API endpoint is incorrect and incomplete in your request. The HTML you pasted is actually Google’s default 404 error page, not something caused by your C# code syntax.

Let’s break it down clearly.

The main issues in your code are:

1. Wrong base URL + resource combination

2. Missing required query parameters

3. YouTube Analytics API does NOT work with API key alone

1. Incorrect URL construction

You are doing this:

var client = new RestClient("youtubeanalytics.googleapis.com/v2/reports");
var request = new RestRequest("reports", Method.GET);

This results in:

/v2/reports/reports?key=ApiKey

That URL does not exist, which is why Google returns 404.

2. Correct base URL

The correct base URL should include https and should not duplicate reports.

Correct base URL:

https://youtubeanalytics.googleapis.com/v2/

3. YouTube Analytics API requires OAuth 2.0

? Important
You cannot access YouTube Analytics reports using just an API key.

The API requires:

• OAuth 2.0 authentication

• An access token

• A valid authorized YouTube channel

So this will always fail:

request.AddParameter("key", "ApiKey");

4. Required parameters for /reports

The /reports endpoint requires mandatory parameters such as:

• ids

• startDate

• endDate

• metrics

Without these, the request is invalid even if authentication works.

5. Correct example (URL format)

A valid request looks like this:

GET https://youtubeanalytics.googleapis.com/v2/reports
?ids=channel==MINE
&startDate=2024-01-01
&endDate=2024-01-31
&metrics=views

And it must include an OAuth Bearer token.

6. Correct RestSharp example (simplified)

var client = new RestClient("https://youtubeanalytics.googleapis.com/v2/");
var request = new RestRequest("reports", Method.GET);

request.AddHeader("Authorization", "Bearer YOUR_ACCESS_TOKEN");

request.AddParameter("ids", "channel==MINE");
request.AddParameter("startDate", "2024-01-01");
request.AddParameter("endDate", "2024-01-31");
request.AddParameter("metrics", "views");

var response = client.Execute(request);

7. Why LAN or browser tests may confuse you

• Opening the URL directly in a browser ? returns 404

• Using API key ? unauthorized for Analytics API

• Missing OAuth token ? request rejected

This behavior is expected.

summary

• /v2/reports/reports is invalid
• API key alone will not work
• Required parameters are missing
• Use correct base URL
• Authenticate using OAuth 2.0
• Pass required query parameters

Hi Ramco, check your API Key whether it is correct and try.

public void VideoContentDetails()
{
    Int32 Count = 1;
    StringBuilder htmlTable = new StringBuilder();

    List listVideo = new List();

    var client = new RestClient("youtubeanalytics.googleapis.com/v2/reports");

    var request = new RestRequest("reports", Method.GET);
    request.AddParameter("key", "ApiKey");//replace ApiKey with actual key

    var response = client.Execute(request);
}

Replace with correct ApiKey.

Hi,

I think your API key is incorrect or missing scope.

Hello Ramco,

Try below code.

string accessToken = "YOUR_ACCESS_TOKEN";
var client = new RestClient("https://youtubeanalytics.googleapis.com/v2/reports");
var request = new RestRequest("", Method.Get);
request.AddQueryParameter("ids", "channel==your_channel_id");
request.AddQueryParameter("start-date", "your_start_date");
request.AddQueryParameter("end-date", "your_end_date");
request.AddQueryParameter("metrics", "views");
request.AddQueryParameter("dimensions", "day");
request.AddHeader("Authorization", $"Bearer {accessToken}");

var response = client.Execute(request);

Thanks

Naimish Makwana

Try this

var client = new RestClient("https://youtubeanalytics.googleapis.com/v2/");
var request = new RestRequest("reports", Method.GET);
request.AddParameter("key", "YOUR_API_KEY");
var response = client.Execute(request);