Trying to build a custom messaging client that bypasses the standard Genesys Cloud Messenger widget. The goal is to use the Guest API to create a context and then send messages directly. I’ve got the OAuth token generation working fine using the client credentials flow. The token scopes look correct in the decoded JWT.
The issue hits on the first API call. I’m hitting POST /api/v2/conversations/messaging/contexts with the following payload:
{
"externalContactId": "ext-contact-123",
"name": "test-user",
"email": "test@example.com"
}
The response is consistently a 403 Forbidden. The error body says "errors": [{"code": "UNAUTHORIZED", "message": "Insufficient permissions for this action"}].
I’ve checked the scopes on the token. It has messaging:write, messaging:read, and webchat:write. The documentation for the Guest API implies that as long as you have a valid token, you can create contexts. But it seems like something is missing.
I tried adding the x-gc-pure-request header set to true but that didn’t change anything. I also verified that the externalContactId is unique.
Is there a specific permission or configuration on the Web Chat instance that needs to be enabled to allow direct API access? Or is the Guest API strictly bound to the widget’s internal authentication flow?
The code is straightforward. Using fetch in Node.js.
const response = await fetch(`${baseUrl}/api/v2/conversations/messaging/contexts`, {
method: 'POST',
headers: {
'Authorization': `Bearer ${token}`,
'Content-Type': 'application/json',
'Accept': 'application/json'
},
body: JSON.stringify(payload)
});
Getting stuck on this 403. The docs are sparse on the exact requirements for direct API usage versus widget usage. Any pointers on what might be triggering this permission error?