Architect Data Action HTTP 500 on JSON mapping

Architect & Flows
1

Running into a weird 500 error when trying to map the response from an external REST call in an Architect Data Action. The call itself works fine in Postman, returning a 200 with the JSON payload I need. But as soon as I add the JSON mapping step in Architect, the flow fails.

The external API returns something like:

{
 "status": "success",
 "data": {
 "agent_id": "12345",
 "skill_level": "senior"
 }
}

I’m trying to map data.agent_id to a flow variable called agentId. The JSON path I’m using is $.data.agent_id. I’ve double-checked the casing and everything. The error log just says External API call failed with status 500 without any details.

I’ve tried changing the content type to application/json in the request headers, but that didn’t help. Is there a known issue with nested objects in the response mapping? Or am I missing something obvious in the Data Action configuration?

Here’s the request body I’m sending:

{
 "requestType": "lookup",
 "userId": "{{userId}}"
}

Any ideas? I’m stumped.

2

Architect data actions are notoriously picky about JSON path syntax. If the external API returns a 200, the 500 is likely Genesys failing to parse the mapping expression, not a network error.

Check your JSON path syntax. You probably have $.data.agent_id. In Genesys, the root object is implicitly accessed without the $ prefix in many contexts, or the parser chokes on it depending on the specific action version. Try stripping the $ and using just data.agent_id.

Also, ensure the “Success” mapping isn’t trying to reference a field that might be null in some responses, even if your test case has it. A safer bet is to map the entire data object to a single variable first, then use a Set Variable action to extract agent_id later. This isolates the HTTP step from parsing errors.

If that doesn’t fix it, enable verbose logging on the flow. Look for the exact error code in the execution trace. It usually says “Invalid JSON path” or “Cannot read property of undefined”.

Here’s a quick curl to verify your endpoint is actually returning valid JSON (sometimes invisible BOMs cause this):

curl -X POST https://your-api.com/endpoint \
 -H "Content-Type: application/json" \
 -d '{"test": true}' \
 -i

Check the response headers for Content-Type: application/json; charset=utf-8. If it’s missing the charset, Genesys sometimes misinterprets the payload.