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# Performing requests

This section provides instructions for making requests using request headers, request bodies, and queries.

In this topic:

## Request header

All supported input header fields follow the HTTP/1.1 protocol. Below you can find a list of the supported request header fields.

Header name | Mandatory | Functionality
--- | --- | ---
Accept | No | The media types that the client can accept in the response. An empty value or a missing header means that the client can accept all media types. If the media type cannot be provided by the server, the server should return a 406 (Not Acceptable) HTTP status code. Example: Accept: application/json,text/html, application/ xhtml+xml,application/xml;q=0.9, image/webp*/*;q=0.8
Accept-Encoding | No | Restricts the content coding that the client can accept in the response. An empty value or a missing header means that the client can accept all content coding. If the coding type cannot be provided by the server, the server should return the 406 (Not Acceptable) HTTP status code. Example: Accept: Accept-Encoding: gzip,deflate,sdch
Content-Type | No | Specifies the media type that is being used for the request body. An empty value or an unknown value returns a 415 (Unsupported Media Type) HTTP status code. If the header is missing, the request is parsed with the web server's default setting. Example: Content-Type: application/json
Host | Yes | Represents the authority of the server or gateway from which the resource is requested. An empty value, an unrecognized value, or a missing header must return a 400 (Bad Request) HTTP status code. Example: Host: <server>:<port>

Note:

- When sending data, always send a Content-Type header to specify the type of data being sent from the client to the server.

- Do not send a Content-Type header unless content is sent.

- Always send an Accept header to specify the format of the data to receive from the server.

## Request body

The API supports only application or json representation, both on request and response.

Data is submitted and returned in the JSON format unless otherwise specified in the reference for a resource. This API uses the ECMA 404 Specification.

All supported request methods follow the HTTP/1.1 protocol.

Request | Description
--- | ---
GET | Requests a representation of a resource matching the request URI.
PUT | Requests that the enclosed represented resource will be stored under the matching request URI if the resource already exists.
DELETE | Requests a deletion of the resource found in the matching request URI.
POST | Requests a creation of a new resource under the resource collection matching the request URI.

## See also

- Performing requests

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