WhatsApp Cloud API: Outbound Message Failed to be Delivered

Update timeline

1. identified Aug 29, 2026, 04:50 AM UTC

   We're aware that users are experiencing errors when sending messages through the WhatsApp Cloud API, as well as when reconnecting a Cloud API channel. Affected messages return a Meta API error (#100). We apologize for the disruption this is causing. Our team is actively...

2. investigating Aug 29, 2026, 09:30 AM UTC

   We’re continuing to investigate intermittent issues affecting WhatsApp Cloud API channels. Error rates have decreased and remain low and scattered, with no further major spikes. However, some users may still encounter Meta API error (#100) when sending messages or reconnecting their...

3. investigating Aug 31, 2026, 08:40 AM UTC

   Following further investigation, we can confirm this is not an intermittent issue. Outbound messages on WhatsApp Cloud API channels are failing consistently rather than occasionally. Channels connected through respond.io's own BSP are not affected. The cause appears to be a loss of phone-...

4. investigating Sep 02, 2026, 07:05 AM UTC

   Update: We have identified an additional impact affecting incoming media attachments on WhatsApp Cloud API channels. Text messages continue to be received, but some incoming attachments, such as images or files, may fail to load in the respond.io Inbox and display the error <...

5. investigating Sep 09, 2026, 07:00 AM UTC

   Investigating Update: We’ve identified additional steps that may help restore affected WhatsApp Cloud API channels. If your channel is affected, please first grant respond.io access to your WhatsApp Business Account in Meta Business Manager...

6. resolved Sep 16, 2026, 07:00 AM UTC

   Incident Summary Beginning 29 August 2026, a number of WhatsApp Cloud API channels were unable to send outbound messages, returning a Meta API error (#100). The same issue also prevented incoming attachments, such as images and files, from loading in the respond.io Inbox,...