# Twilio Voice Insights Call Summary drops attributes.conference_participant on 2026-08-01

- **Provider:** Twilio
- **Endpoint:** `GET /v1/Voice/{CallSid}/Summary`
- **Effective:** 2026-08-01
- **Severity:** medium
- **Change:** field-rename
- **Status:** verified

## What changed

On August 1, 2026 Twilio removed the conference_participant attribute from the Voice Insights Call Summary (GET /v1/Voice/{CallSid}/Summary on insights.twilio.com) and the matching Event Streams event; attributes now returns null for every call. Code that reads attributes.conference_participant gets nothing, and code that dereferences attributes can throw.

## What to do

Stop reading attributes.conference_participant and treat attributes as nullable. Get conference data from the Conference Insights API or Conference Insights Event Streams instead.

## Sources

- Provider notice (2026-07-01): https://www.twilio.com/en-us/changelog/voice-insights-removal-conference-participant-field
- https://www.twilio.com/docs/voice/voice-insights/api/call/details-call-summary
- https://www.twilio.com/docs/voice/voice-insights/api/call/call-summary-resource

## Machine-readable

- Advisory: https://github.com/SriVarshini09/shapi-advisories/blob/main/advisories/twilio-voice-insights-conference-participant-removed.json
- OSV: https://shapi.dev/osv/twilio-voice-insights-conference-participant-removed.json