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You can accomplish this with the JSON List Processor. The following workflow demonstrates how:

1. Create a new .pva and add a JSON Responder to the suite.

2. In the JSON Responder, go to Options > Request Template and add the sample request payload above.
   
3. In the Response tab, add the following literal payload:
   

   Code Block
   {     "response" : {         "itemResponses" : [             ${Outgoing List}         ]     } }

   Note: The ${Outgoing List} variable will be resolved at runtime with the aggregated responses for each item processed by the JSON List Processor.
   
4. Save your changes.
5. Chain a JSON List Processor to the Incoming Request output of the responder (right-click > Add Output > Payload > JSON List Processor).
   
   
6. Configure the JSON List Processor to extract the “item” object node. The generated XPath will automatically select all items under the “items” array.
   
   
7. Save your changes.
8. (Optional) For runtime visibility, you can use an Extension Tool to print each processed item to the console:
   1. Chain an Extension Tool to the JSON List Processor (right-click > Add Output… > Incoming Item > Extension Tool).
   2. Add the following Groovy script in the Extension Tool.
      

      Code Block
      language groovy
      import com.parasoft.api.Application def showMessage(input, context) {     Application.showMessage("Extension Tool Output - Incoming Item:\n" + input + "\n")

   3. Save your changes.
9. Add a Table data source to the suite to perform data source correlation (right-click > Add New > Data Source > Table).
10. Enable First row specifies column names.
11. Add the following data:
    

    id	name	balance
    1	William	72500.13
    2	Beverly	33000.99
    3	Richard	42010.75

    
12. Save your changes.
13. Chain a JSON Message Responder to the JSON List Processor (right-click >Add Responder > JSON Message Responder). Name the responder “Success Responder”.
14. Go to Options > Request Template and add the following payload:
    

    Code Block
    {    "id": 1,    "name": "William" }

    
15. Go to Data Source Correlation > Request Body and configure correlation for the id field and use the data source column “id”.
    
16. Click the Response tab and add the following literal payload:
    

    Code Block
    {     "id" : ${id},     "name" : "${name}",     "balance" : ${balance} }

    
17. Save your changes.
18. Send a POST request to the Virtual Asset using a .tst or .pvn file and confirm the expected response.

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1. Chain a JSON Message Responder to the JSON List Processor (right-click > Add Responder… > JSON Message Responder).
2. Name the responder “Error Responder – Return error for invalid id”.
3. Click the Response tab and add the following literal payload:
   

   Code Block
   {     "id" : “${{=/root/id/text()}}”,     "error" : {         "code" : "NOT_FOUND",         "message" : "No active account found for id '${{=/root/id/text()}}'."       } }

   This payload uses inline expressions to extract values from the incoming JSON directly. Alternatively, you could use a JSON Data Bank to extract values.

4. Send a POST request to the Virtual Asset with the following payload and confirm the error message is included in the response.
   

   Code Block
   {     "request": {         "items": [             { "id": 1, "name": "William" },             { "id": 13, "name": "George" },             { "id": 2, "name": "Beverly" },             { "id": 3, "name": "Richard" }         ] }

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