These variables are defined under the parameters object in the OpenAPI definition. The client could describe the page number (offset) and the amount of information on the page (limit), for example: GET In our example, it would make sense to let the client limit the information required instead of returning the entire list of artists from the database, which would lead to unnecessary load on the server. It is a non-hierarchical component of the URL. Query parameters are optional and non unique, so they can be specified multiple times in the URL. They appear at the end of a URL following a question mark. Query parameters are the most common type of parameters. See Describing Responses for more information on responses.

# - Added lines -ĭescription: Successfully returned a list of artists An unsuccessful request is described under the 400 HTTP code, with a corresponding error message detailing why the response is invalid. A successful response will return the artist name, genre, username and albums recorded. You can find more information about HTTP status codes here. In our sample code, we have specified 200, which is a successful client request, while 400 is an unsuccessful request. The description gives details on what the responses of the API would be. The GET method, under the artists endpoint, lets the consumer of the API obtain the details of a list of artists from the database.Įvery response would need at least one HTTP status code to describe the kind of responses a consumer is likely to expect. For more advanced security, see Authentication. We also secure the API using Basic authentication, so that only authorized users can consume the API. Some APIs have a single server, others may have multiple servers, such as production and sandbox. The API endpoint paths are appended to the server URL.

The servers array specifies one or more server URLs for API calls. The info object contains the API title and version, which are required, and an optional description. openapi: 3.0.0ĭescription: A simple API to illustrate OpenAPI conceptsĮach API definition starts with the version of the OpenAPI Specification that this definition uses.

Let’s start with a simple API definition that contains just meta information, such as the API title, version, server URL and other descriptive information.

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