POST /api/v2/conversations/calls 400 Bad Request: Malformed participant address

{
 "error_code": "bad_request",
 "message": "The request body was malformed or the address is invalid."
}

Hit a wall trying to programmatically initiate outbound calls via the Node.js SDK. The docs say the to address in the participants array should just be a string, but I keep getting a 400. We’re using genesys-cloud-node-sdk@2.28.0 and running this inside an AWS Lambda (Node 18).

Here’s the payload I’m sending to POST /api/v2/conversations/calls:

const createCallRequest = {
 from: {
 phoneNumber: "+1234567890",
 name: "Test Bot"
 },
 to: {
 phoneNumber: "+0987654321",
 name: "Customer"
 },
 participants: [
 {
 fromAddress: "+1234567890",
 toAddress: "+0987654321"
 }
 ]
};

I’ve tried swapping toAddress for just a raw string "+0987654321" in the participants array, but the SDK’s type definitions are strict and it blows up at compile time if I don’t pass an object. The from and to top-level fields seem fine since they match the example in the Swagger UI.

Is the participants array even required for a simple outbound call? The API spec lists it as optional, but when I omit it entirely, I get a different 400 error saying participants cannot be empty.

Also, noticed that the from object needs a name field in some versions of the API. Is that causing the parser to choke on the address format? The phone numbers are definitely E.164 compliant. I’ve validated them with a regex before sending.

Feels like there’s a mismatch between the SDK’s generated types and what the actual REST endpoint expects for the participants schema. Anyone else hit this when using the JS SDK for call creation?