Data Action POST fails - 400 Bad Request - Schema Validation

NICE CXone API & Integrations
1

The DATA ACTION webhook POST is failing consistently with a 400 Bad Request - specifically, the SCHEMA VALIDATION is rejecting the payload. It’s happening in a PRODUCTION environment, and it started after the latest ARCHITECT FLOW deployment. The weird thing is, the POST request works fine directly against the API endpoint using Postman - it’s only breaking through the DATA ACTION.

Here’s the relevant DATA ACTION configuration. It’s a simple POST to a custom endpoint:

{
 "name": "Webhook POST",
 "method": "POST",
 "url": "https://mycustomendpoint.com/api/v1/data",
 "headers": [
 {
 "name": "Content-Type",
 "value": "application/json" }
 ],
 "requestBody": {
 "type": "application/json",
 "content": "{ \"data\": \"{{TransferData.someVariable}}\" }"
 }
}

I’ve checked a few things.

  • Environment - PRODUCTION Genesys Cloud instance
  • SDK Version - using the latest Genesys Cloud SDK for JavaScript (v3.x)
  • Architect Flow - Simple transfer to the DATA ACTION after a DISCONNECT event
  • Data Action Schema - Verified against the POSTMAN working request. The SCHEMA is correct.
  • TransferData - The someVariable field is populated and contains valid string data.

The error in the Genesys Cloud ACTIVITY LOG looks like this:

{
 "timestamp": "2024-02-29T14:32:00Z",
 "level": "ERROR",
 "message": "Data action execution failed. Error: 400 Bad Request - Schema validation failed.",
 "dataActionId": "abcdef12-3456-7890-abcd-ef1234567890"
}

It almost feels like the SDK is sending something extra in the request that the SCHEMA doesn’t expect, but I can’t pinpoint it. The DEBUG logs are useless. The RESPONSE HEADERS aren’t helpful either.

2

hey! sorry if this is kinda dumb, but are you sure the Content-Type header in the Data Action is set to application/json? We’ve had issues where it defaults to something else and the schema validation just totally fails - the API expects JSON, obviously. try setting it explicitly in the Data Action config, and report back if that fixes it?

3

the content-type thing As noted above is a solid first check - it’s dumb simple but happens all the time. but schema validation failing only through data actions? that screams encoding issues to me.

we’re on zoom contact center and have seen this a bunch (inc-4471 was a fun one). the data action wrapper does some sneaky things with the payload before it ships it out. specifically, it double-encodes json if it thinks the content-type is already application/json.

try setting the content-type to text/plain in the data action config. then, in your custom endpoint, manually parse the json. it’s a workaround, yeah, but it bypasses the double-encoding.

here’s what i mean - the data action config would look like this:

{
 "name": "my data action",
 "url": "your endpoint",
 "method": "post",
 "contentType": "text/plain"
}

beware: your endpoint needs to be able to handle the raw json string and parse it itself. if you’re already doing json parsing on the receiving end, it’ll likely break. the system just…does this sometimes. it’s not ideal.

4

Hey everyone,

Yeah, double-encoding the JSON - that’s a sneaky one, isn’t it? It’s like the platform is trying to break things.!!

Cause: The Data Action wrapper adds another layer of JSON encoding when it detects Content-Type: application/json.

Solution: Option A - set Content-Type to text/plain in the Data Action config. Simple, but you’ll need to manually serialize the payload in the flow. Option B - drop the encoding altogether by using a data action to pre-process the JSON and send the raw string.