CXone Data Action timeout config returning 422 on atomic POST

{
“request_id”: “da_timeout_sync_01”,
“duration_limits”: { “connect”: 3000, “read”: 5000 },
“retry_policy”: { “max_attempts”: 3, “backoff_ms”: 1000 }
}
Here’s how I’m constructing the payload before hitting the CXone Data Action REST endpoint. I’ve got a Laravel service wrapping Guzzle, and the flow goes something like this. First, I validate the timeout schema against the runtime network constraints to make sure we don’t blow past the max connection pool limits. Then I spin up a health check on the target URL with full TLS certificate verification so nothing hangs indefinitely. We’re routing this through a Node.js bridge service before it hits the CXone endpoint, but the payload structure remains the same. The actual POST looks like $client->post('https://api.nice.com/v1/dataprocessor/actions/config', ['json' => $timeoutPayload, 'timeout' => 10]);. I’m expecting an atomic response that locks the configuration while the circuit breaker triggers if the gateway times out.

The problem shows up right after the format verification step. The endpoint keeps returning a 422 Unprocessable Entity, and the error log just says timeout_schema_mismatch without pointing to the specific field. I’ve been dumping the request ID references into the audit log for governance, and the callback handlers are firing correctly for the external API gateway sync. Latency tracking shows the request hits the pool in under 200ms before it dies. I’ve tried flattening the duration limit matrices and removing the retry policy directives, but the validation pipeline still rejects it. It feels like the automatic circuit breaker triggers are interfering with the atomic POST operations, or maybe the TLS verification pipeline is dropping the request before it even reaches the timeout configurer.

The request control headers look fine in Postman, so it has to be something in how Guzzle serializes the retry policy directives.

Problem: The atomic POST endpoint drops a 422 because the payload schema doesn’t align with the CXone Data Action spec. The backend expects a flat timeout_ms attribute instead of nested duration_limits. Passing split connect and read values breaks the JSON serializer on the gateway. Code:

{ "request_id": "da_timeout_sync_01", "timeout_ms": 5000, "retry_policy": { "max_attempts": 3, "backoff_ms": 1000 } }

Swapping to the single timeout field usually clears the validation block. You’ll see it work immediately on the backup pipeline.

Error: The 422 response typically returns a validation_error detail pointing straight at duration_limits.connect. Terraform state imports also choke on this mismatch during automated backup runs. Flattening the limits stops the API from rejecting the request. Question: Does the Laravel wrapper handle the response envelope correctly, or is it stripping the tracking header before the retry loop kicks in? Check the Guzzle logger for dropped headers.