Hey folks,
I’m building a custom web interface for a client who absolutely hates the default Messenger widget. They want a totally bespoke chat UI embedded in their e-commerce site. So, I’ve been trying to use the Genesys Cloud Guest API directly to handle the session lifecycle and message passing without the JS SDK.
I can get the session started fine. The POST /api/v2/conversations/messaging call returns a 201 and gives me the conversationId and participantId. But when I try to send the first message using POST /api/v2/conversations/messaging/conv/{conversationId}/messages, the server immediately hits back with a 400 Bad Request.
Here’s the JSON payload I’m sending:
{
"to": [
{
"id": "98765432-1234-5678-9012-123456789012",
"type": "user"
}
],
"from": {
"id": "12345678-1234-5678-9012-123456789012",
"type": "user"
},
"text": "Hey there, need help with order #555"
}
The to ID is the queue user ID I grabbed from the session object. The from ID is the participant ID from the initial POST. I’ve double-checked the OAuth token has the messaging:conversation scope.
The error response is pretty vague:
{
"errors": [
{
"code": "invalid_request",
"message": "The request was invalid."
}
]
}
Is there a specific header I’m missing? Or maybe the from ID needs to be formatted differently when bypassing the widget? I’ve been staring at the docs for an hour and it just says “send a message to the conversation” without much detail on the guest flow specifics.