Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.requestly.com/llms.txt

Use this file to discover all available pages before exploring further.

You can store response data from one API call and use it in the request body of another. This is done using $sharedState, allowing seamless data sharing between Modify Response and Modify Request rules
$sharedState is only available in extension versions > v24.8.13 and desktop app versions > v1.7.1.

​
Aggregate Data from API Response

1

Create a Modify Response Rule

Open Requestly Interceptor and create a new Modify Response rule.
2

Select Dynamic Modification (JavaScript)

Choose Dynamic JavaScript Modification in the rule options
3

Store Response Data in $sharedState

Use the following code to store response values like products and currency:
function modifyResponse(args) {
  const { method, url, response, responseType, requestHeaders, requestData, responseJSON } = args;

  // Extract data from response
  const productList = responseJSON.products;
  const currency = responseJSON.currency;

  // Store in shared state
  $sharedState.productList = productList;
  $sharedState.currency = currency;

  return response;
}

​
Use Aggregated Data in Request Body

1

Create a Modify Request Body Rule

Create a new Modify Request Body rule in Requestly Interceptor.
2

Select Dynamic Modification (JavaScript)

Select the Dynamic Modification option.
3

Use Data from $sharedState in the Request

Inject the stored products and currency into your outgoing request
Here’s the code to include the previously saved data:
function modifyRequestBody(args) {
  const { method, url, body, bodyAsJson } = args;

  // Retrieve shared state values
  const products = $sharedState.productList;
  const currency = $sharedState.currency;

  // Inject into request body
  return {
    ...bodyAsJson,
    products,
    currency
  };
}