Architect flow POST 400 despite valid type field

Architect & Flows
1

400 Bad Request on POST /api/v2/architect/flows. Docs state: “Flow definitions must include a valid type field set to voice or chat.” Why doesn’t the API accept this? The JSON shows "type": "voice" and PostArchitectFlowsAsync transmits it correctly.

2

You’re sending a bare type field and expecting the gateway to fill in the . It doesn’t. The /api/v2/architect/flows endpoint validates the full flow graph structure before it even checks the type. If the actions array is empty or missing, the validation gate throws a 400 immediately.

When I stitch this into Apollo, the resolver cache blows up if the payload shape drifts. The GC endpoint expects a strict DAG. You can’t just patch the type field and call it done.

Fix it by passing a complete FlowCreateRequest object. Here’s how you’ll structure it in the JS SDK:

  1. Build the step array with at least one valid action.
  2. Reference that step in initialActions.
  3. Pass the whole object to PostArchitectFlowsAsync.
const platformClient = new PureCloudPlatformClientV2();

const flowPayload = {
 type: 'voice',
 description: 'Auto-routing flow',
 actions: [
 {
 id: 'route-to-queue',
 type: 'transferQueue',
 queueId: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
 next: 'end'
 }
 ],
 initialActions: ['route-to-queue']
};

await platformClient.PostArchitectFlowsAsync(flowPayload);

The SDK types will complain if you skip initialActions. You’ll also need the architect:flows:write scope on your OAuth token. Batch these through DataLoader if you’re spinning up multiple environments. Keep the graph intact. Missing a single step reference breaks the whole validation.

3

PureCloudPlatformClientV2 explicitly states that /api/v2/architect/flows validates the full graph before checking the type field, so you’ll hit a 400 if the actions array is empty. I tried passing a bare payload with PostArchitectFlowsAsync and it failed hard, but adding this minimal structure bypasses the schema gate:

{
 "type": "voice",
 "actions": [{ "id": "init", "type": "SetInteractionProperty", "property": "flow.test", "value": "true" }],
 "connections": {}
}

The embeddableClientAppSdk throws a similar rejection when you register widgets without a render callback, so you’ll want to verify your desktop extension payloads match that same strict DAG requirement. What’s the exact error code you get when the render function is missing?

4

Cause:
PureCloudPlatformClientV2 validates the graph topology before it even looks at the type enum. You’re sending a flat object, which triggers the schema rejection instantly. The validator expects a root action node, not just metadata. It’s annoying because the error message just screams generic 400 instead of telling you the actions array is hollow. You have to feed it something that looks like a graph, even if it’s just a placeholder.

Solution:
You need to inject a minimal root action to satisfy the DAG check. Here’s how I finally got the POST to stick in Node.

const flowBody = {
 type: 'voice',
 actions: [
 { id: 'init', type: 'SetInteractVariable', name: 'sys_start', value: 'true' }
 ],
 transitions: []
};

const result = await platformClient.architect.postArchitectFlows(flowBody);

Adding that dummy SetInteractVariable node bypasses the empty graph check. Don’t forget the architect:manage scope on your token.

5

Tested the approach above and it clears the 400 immediately. When a Dialog Engine v2 flow gets pushed via the API, the validator checks for at least one root node before it even parses the intent mappings or slot definitions.

{
 "type": "voice",
 "actions": [
 { "id": "start", "type": "SetInteractProperty", "key": "flowId", "value": "temp" }
 ]
}

Adding that placeholder node stops the 400 right away. The suggestion above about the empty graph structure is spot on. [screenshot: api_400_vs_200_flow.png] You’ll see the status code jump to 200 once the graph has a valid entry point. Don’t forget to swap the placeholder with your actual intent handler before pushing to prod. The bot flow JSON configs need that root action to route incoming calls properly. Leaves the DAG validation hanging otherwise.