WireMock

What is it you need to do?

You can match on the `Content-Type` header &amp; the body:
```stubFor(
  get(urlEqualTo("/some/thing"))
    .withHeader("Content-Type", equalTo("application/x-www-form-urlencoded"))
    .withRequestBody(containing("foo=bar"))
    .willReturn(aResponse())
);```
If you need to use the values in the response have a look at "Form helper" under <https://wiremock.org/docs/response-templating/> .

There aren't any form specific matchers but it might be nice to add them - something like:
```.withRequestBody(
  matchingFormKey("foo", equalTo("bar))
)```
You could have a look at `MatchesJsonPathPattern` as an example of how to do it.