Sending POST API Request [C#/.NET Code]

C#/.NET code for Sample API POST Request Example

What is API?

API (Application Programming Interface) is a program mediator that allows two applications to exchange data and complies with HTTP and REST standards. API refers to standards and documentation that describe how to create or use such a connection or interface. The primary purpose of APIs is to hide the internal details of how the system works and show only those parts that are visible and accessible to external systems, keeping them consistent even if the internal implementation change later.

What is POST request?

The HTTP POST request method sends data to the server. For CRUD operations, the HTTP POST method is used to create or update a resource on the server. The POST is one of the most widely used methods of the HTTP protocol. The HTTP POST method is used to submit web forms, upload files and images to the server.

How to make a POST request to an API?

The following is an example of sending a POST API request to ReqBin echo URL:

POST /sample/post/json HTTP/1.1
Host: reqbin.com
Content-Type: application/json
Content-Length: 17
      
{
  "Id": 78912
}

Server response to our Sample API POST Request:

HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: 19
Connection: keep-alive

{"success":"true"}

See also

• REST API Example
• How to test API Endpoint?
• How do I post JSON to the JSON API endpoint?
• How do I get JSON from a REST API endpoint?