Source Condition : If the request url matches this source condition, then only the rule is applied. You can use URL, Host or Path with Regex, Contains, Wildcard or Equals to match the source request. Learn more about source conditions here.
Status Code : Update the Response status code. (2XX, 3XX, 4XX, 5XX ...). If left empty, original status code is returned.
Static Response Body : Define the updated response body which needs to be returned.
Source Filters : This helps you define better targeting conditions and restrict rules to be applied on specific webpages (or domains), request types, request methods, or request payload. Learn more about source filters here.

Programmatic Modification Script (JS) : Write a JavaScript script which can modify the existing response programmatically.

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method (string)- The HTTP method of the request. GET | POST | PUT | DELETE etc.
url (string) - The request URL.
response (string)- The original response object represented as string. Eg:

'{"id":1,"app":"requestly","feature":"modify-request"}'

responseType (string)- The content-type of the HTTP response.
requestHeaders (Object<string, string>)- The request headers sent to the server.
requestData (string)- The HTTP request payload in case of POST | PUT | PATCH requests.
responseJSON (JSON object)- The original response represented as JSON Object:

{
  "id":1,
  "app":"requestly",
  "feature":"modify-request"
}

You can modify both response or responseJSON and return any of them. Response Rule will automatically handle the response returned for the request.

Targeting GraphQL requests

You can target GraphQL requests using the operation name in request body. To do so add:

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To learn more about this checkout GraphQL Support.

Guides

Modifying Response asynchronously: Async modifications lets you perform some long running tasks before returning the response
Modifying Non Existent Domain: Helpful for frontend developers when the backend isn't ready yet.