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Basics of API

If you are new to API, Lets review the basics terminology used in API .

API stands for Application Programming Interface. APIs act as a software intermediary to enable two software components to communicate with each other.

End point: Address where API is hosted on the Server.

HTTP methods: which are commonly used to communicate with Rest API’s are GET, POST, PUT, and DELETE

GET- The GET method is used to extract information from the given server using a given URI. While using GET request, it should only extract data and should have no other effect on the data. No Payload/Body required,To send input data in GET use Query Parameters

POST- A POST request is used to send data to the server, for example, customer information, file upload, etc. using HTML forms.To send input data in POST use Body Payload

PUT- Replaces all current representations of the target resource with the uploaded content.

DELETE- Removes all current representations of the target resource given by a URI.


Resources represent API/Collection which can be accessed from the Server


Example :BaseURL/api/users

Path Parameters:Path parameters are variable parts of a URL path. They are typically used to point to a specific resource within a collection, such as a user identified by ID


Query Parameters:Query Parameter is used to sort/filter the resources.Query Parameters are identified with "?"


Headers/Cookies:Headers represent the meta-data associated with the API request and response. In general terms, we were sending Additional details to API to process our request.

Example : Authorization details.

By using above information we can construct the End Point Request URL as below

Base URL/resource/(Query/Path)Parameters

Thanks for reading the blog. Hope you got an idea of API terminology.

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