If the API you’re mocking already exists you can speed up the process of stubbing responses using WireMock Cloud’s record feature. This essentially involves telling WireMock Cloud to act as a proxy to the target API then directing some HTTP requests to WireMock Cloud representing the resources you’d like to stub.

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A simple recording example

Once you have logged into WireMock Cloud and created a mock API, navigate to the Stubs page.

Then hit the Record button, enter http://ip-api.com as the target URL and hit Start.

Now make a request to your mock API (substituting my-mock-api for your own sub domain name):

$ curl -v http://my-mock-api.wiremockapi.cloud/json

This request will be proxied through WireMock Cloud, so that a GET request will be made to http://ip-api.com/json and the result captured.

Now hit Stop, and you should see that an extra stub has been added to the list.

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Request matching rules when recording

When a request with no body is received during recording, the recorder will create a stub matched on HTTP method and URL only.

When a request with a body is received a body pattern is also included. If the request body is a valid JSON document, then the equalToJson operator will be used. If XML, the equalToXml operator will be used. Otherwise the operator will be equalTo i.e. simple string equality.

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Recording from Private Endpoints

For obvious reasons, WireMock Cloud cannot record by proxying to an endpoint that is not accessible via the internet. Nor can it record from an endpoint that requires authentication via mutual TLS. However, this can be achieved using the WireMock CLI. See Recording using the WireMock CLI.