How to traverse object with dynamic keys in Paw?

Let's say we have the following JSON response:

{
  "abcd1234": {
   "foo": "bar"
 }
}

How would "bar" be accessed in a response parsed body value? In the response, "abcd1234" could be anything. But we want the first key in the object (in JavaScript this would be Object.keys(res)[0]).

Paw makes it easy to parse JSON (and XML) responses and access subfields via their key-path.

This documentation article may help: https://paw.cloud/docs/advanced/reuse-values-from-previous-responses

Insert the Response Parsed Body dynamic value

Set the input request and extract the needed value

In your example, the key path will be:

abcd1234.foo

Though, it seems like you need to access the path without knowing the key before hand. If so, one way would be to use a JavaScript snippet to be able to achieve the behavior you want.

On any field, you may right-click and pick Extensions > JS Script.

Here's a snippet that may fit your needs:

function evaluate(context){
    var request = context.getCurrentRequest();
    var exchange = request.getLastExchange();
    var body = JSON.parse(exchange.responseBody);
    var key = Object.keys(body)[0];
    var value = body[key].foo;
    return value;
};