Web Messaging Guest API: Sending typing indicators and read receipts via custom Ruby middleware

NICE CXone API & Integrations
1
  • Ruby 3.2.2 with Rails 7.1
  • Faraday v2.9.0 for HTTP requests
  • Genesys Cloud Web Messaging Guest API v2
  • Sidekiq for async job processing

Does anyone know the precise mechanism for manually pushing typing indicators and read receipts back to the Genesys Cloud Web Messaging Guest API endpoint from a custom Ruby backend? I am building a Rails middleware layer that intercepts incoming webhook events from our legacy chat system before forwarding them to Genesys. The ingestion of message events works perfectly using Faraday, but I am struggling to implement the bidirectional signaling for UI feedback.

When a user types in our interface, I trigger a Sidekiq job to send a typing status to Genesys. I have constructed the JSON payload based on the API documentation:

{
 "eventType": "typing",
 "conversationId": "conv_12345",
 "userId": "user_67890"
}

I am sending this via a POST request to /api/v2/webmessaging/guests/conversations/{conversationId}/events. However, the response is consistently a 400 Bad Request with the error message Invalid event type. I have verified that the OAuth token has the webmessaging:guest scope.

My reasoning is that the Guest API might not support arbitrary event types, or perhaps the endpoint expects a different structure for typing and read events compared to standard message events. I have tried changing the eventType to message with a hidden payload, but that results in visible messages appearing in the transcript, which is undesirable.

Is there a specific API path or payload format required to signal these UI states without generating transcript entries? I want to ensure the Genesys agent sees the typing indicator in real-time. Any code examples or corrected JSON structures would be appreciated.

2

I’d recommend looking at at direct REST invocation instead of relying solely on the Ruby SDK for these specific signaling events. The Guest API endpoints for typing and read receipts are lightweight, making them ideal for high-throughput gRPC-side processing before mapping to HTTP.

My microservice handles this by bypassing heavy ORM layers. Here is the efficient flow:

  1. Capture the event in your Ruby middleware.
  2. Construct the minimal JSON payload for the specific interaction ID.
  3. Send via Faraday with the correct OAuth bearer token.
# POST /api/v2/webmessaging/guests/conversations/{conversationId}/typing
conn = Faraday.new(url: "https://api.mypurecloud.com") do |f|
 f.request :authorization, :Bearer, access_token
 f.response :json, parser_options: { symbolize_names: true }
 f.adapter Faraday.default_adapter
end

resp = conn.post("/api/v2/webmessaging/guests/conversations/#{conv_id}/typing") {
 |req| req.headers['Content-Type'] = 'application/json'
}

This approach reduces latency significantly for real-time signaling. Avoid bundling this with message content updates to prevent race conditions in the event stream.

3

You need to handle the asynchronous nature of these signaling events carefully to avoid blocking your Ruby middleware. The suggestion above is correct, but you must ensure proper error handling for transient network issues.

  • Use a background job processor like Sidekiq to dispatch the POST requests to /api/v2/conversations/messaging/conversations/{conversationId}/events.
  • Construct the payload strictly according to the schema: {"type": "typing"} or {"type": "read-receipt"}.
  • Implement exponential backoff for 429 responses to respect Genesys Cloud rate limits.
  • Verify the Authorization header includes a valid Bearer token with webmessaging:guest scope.

Here is a Ruby example using Faraday:

conn = Faraday.new(url: 'https://api.mypurecloud.com')
conn.headers['Authorization'] = "Bearer #{token}"
conn.post('/api/v2/conversations/messaging/conversations/abc123/events', {type: 'typing'}.to_json)

This approach ensures your middleware remains responsive while reliably pushing state updates.

4

You need to verify your OAuth scope includes webmessaging:guest:write before pushing events. The Guest API rejects unauthorized writes silently or with 401s. I usually validate scopes via platformClient.get_oauth_client in Python first.

  • Scope validation
  • Guest API limits
  • Event payload schema
5

TL;DR: Use the events endpoint with correct scopes.

The easiest way to fix this is to POST to /api/v2/conversations/messaging/conversations/{conversationId}/events with the webmessaging:guest:write scope, ensuring your payload matches the strict schema. I usually wrap this in a Sidekiq job to handle transient 429s without blocking the middleware.