Updating Participant Attributes via PATCH during Active Voice Interaction

Does anyone know the correct payload structure for updating custom participant attributes on a live voice interaction using the Conversations API?

• I am building a Ruby on Rails middleware service that ingests webhook events from Genesys Cloud.
• When an agent starts a call, I need to push real-time customer data back into the interaction context for downstream routing decisions.
• I am using Faraday to make a PATCH request to /api/v2/interactions/{interactionId}/participants/{participantId}.
• My current code constructs the request body as a JSON object with a attributes key containing the custom data map.
• The request returns a 200 OK status, but the attributes do not appear in subsequent interaction events or the interaction details endpoint.
• I suspect the structure requires a specific type field or a nested data object that I am missing.
• Here is the simplified Ruby snippet I am using to build the payload:
• body = {
• attributes: {
• ‘external_ref_id’ => ‘12345’,
• ‘priority_level’ => ‘high’
• }
• }
• I have verified that the interactionId and participantId are correct by logging them from the incoming webhook event.
• The documentation mentions attributeType but does not clearly show how to merge these into an existing interaction.
• Should I be using the merge strategy in the headers, or is the JSON structure fundamentally incorrect?
• Any working examples of the exact JSON body for this endpoint would be appreciated.

I’d recommend looking at at the Conversations API PATCH /api/v2/conversations/interactions/{interactionId}/participants/{participantId} endpoint instead of the generic interactions path. This is more granular for attribute updates. In my PagerDuty escalation workflows, I use this pattern to ensure real-time context is captured before breach thresholds are hit.

The payload structure requires a specific JSON object. Here is a working example using Faraday in Ruby:

payload = {
 "attributes": {
 "customer_tier": "platinum",
 "priority_score": 95
 }
}

response = Faraday.patch(
 "https://api.mypurecloud.com/api/v2/conversations/interactions/#{interaction_id}/participants/#{participant_id}",
 payload.to_json,
 { "Content-Type" => "application/json" }
)

Be careful with the Content-Type header. If you omit it or set it incorrectly, Genesys Cloud will reject the request with a 400 error. Also, ensure your OAuth token has the conversation:participant:write scope. I have seen many integration failures due to missing scopes during high-volume webhook processing. This approach is more reliable for downstream routing decisions in my experience.

make sure you validate the oauth token expiration before sending that patch. using a static token in a long-running rails process is a guaranteed way to get 401s in production. also, the endpoint suggested above is correct but you need the conversations:interaction:write scope. if you are doing this at scale, beware of the rate limits on participant updates.

here is a safer ruby snippet using the purecloud sdk wrapper to handle auth rotation automatically:

require 'genesyscloud'

config = GenesysCloud::Configuration.new(
 client_id: ENV['GC_CLIENT_ID'],
 client_secret: ENV['GC_CLIENT_SECRET'],
 base_url: 'https://api.mypurecloud.com'
)
client = GenesysCloud::ApiClient.new(config)
api = GenesysCloud::ConversationsApi.new(client)

body = GenesysCloud::ParticipantUpdate.new(
 attributes: { "customer_tier": "gold" }
)

api.update_conversation_interaction_participant(interaction_id, participant_id, body)

do not use raw faraday for this. the sdk handles the jwt refresh for you.

If I remember correctly, error: 409 conflict happens when you attempt to patch a participant that has already terminated. You must validate the participantStatus before issuing the PATCH to /api/v2/conversations/interactions/{interactionId}/participants/{participantId}. Use the conversations:interaction:write scope and ensure the JSON payload strictly contains only the modified attributes to avoid race conditions.

check your payload structure. the suggestion above is correct but you need to ensure the json is strictly minimal. sending the full participant object causes a 409 conflict if the version number mismatches.

here is the python equivalent using PureCloudPlatformClientV2. i run this in a celery worker to handle the webhook ingestion.

from platformclientv2 import ConversationApi, ConversationParticipantPatchRequest

api = ConversationApi()
# assume interaction_id and participant_id are from the webhook payload
patch_req = ConversationParticipantPatchRequest(
 attributes={
 "customer_tier": "platinum",
 "last_purchase_date": "2023-10-27"
 }
)

try:
 result = api.patch_conversations_interaction_participant(
 interaction_id=interaction_id,
 participant_id=participant_id,
 body=patch_req
 )
except Exception as e:
 # handle 409 or 401 here
 print(f"patch failed: {e}")

key points:

1. use ConversationParticipantPatchRequest not a raw dict. the sdk handles the json serialization.
2. only include the attributes you are changing. do not send participantStatus or routingStatus unless you explicitly want to change them.
3. the scope conversations:interaction:write is required. if you get a 401, check your token refresh logic. i use the sdk’s built-in oauth client which handles rotation automatically.

if you are doing this at scale, add a small delay or retry logic. the api can be slow to propagate attribute changes to downstream routing decisions. i have seen cases where the route group evaluates the attributes before the patch is fully committed. adding a 200ms sleep before the next step in my workflow helped.

also, verify the interactionId is valid. sometimes the webhook sends a draft interaction id that does not exist yet in the active conversations list. checking GET /api/v2/conversations/interactions/{id} first can save you from unnecessary errors.