Twilio Accounts May Not Be Able to Add a Participant to a Conference Using the Create Participant API, or Modify the State of a Conference Participant (Hold, Unhold, Mute, Unmute) via the Participants API

What to do

• Check whether you use Twilio Conference US1, Conference AU1, Conference IE1, Flex Programmable Voice. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 2h 13m it lasted.

  Anything that failed between 2026-05-27 21:22 UTC and 2026-05-27 23:35 UTC may need a replay.

• Subscribe to Twilio's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=twilio works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Twilio 3

1. investigatingMay 27, 2026, 9:22 PM UTC

   We are investigating an issue with Twilio Accounts that may not be able to add a participant to a Conference using the Create Participant API, or modify the state of a Conference Participant (Hold, Unhold, Mute, Unmute) via the Participants API. We will provide another update in 1 hour or as soon as more information becomes available.

   provider

2. monitoringMay 27, 2026, 10:06 PM UTC

   We also determined that this issue is also impacting Flex. Our engineers have implemented a fix and are monitoring system performance. We will provide another update in 2 hours or as soon as more information becomes available.

   provider

3. resolvedMay 27, 2026, 11:35 PM UTC

   Our engineers have monitored the fix and confirmed the issue with Flex and Twilio Conferences has been resolved. All services are now operating normally at this time.

   provider

Corrections

None so far.

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