Outage in Sinch
Conversation & REST APIs - Delivery Receipt Issue
Resolved MinorIncident Report
Summary AI Generated
Sinch experienced an issue with their Conversation and REST APIs where a subset of delivery receipts for concatenated SMS messages were returning an unknown state instead of proper delivery status. The incident affected SMS and REST API services across multiple regions (US, EU, AU, CA, BR) for approximately 33 hours from May 5th at 07:00 UTC to May 6th at 16:16 UTC. A fix was implemented and monitored before the incident was fully resolved.
We are currently experiencing an issue with our Conversation and REST APIs.
Incident Start Time: 2026-05-05 07:00 UTC
Impact: A subset of Delivery Receipts for concatenated messages will receive an unknown state if submitted via the Conversation or REST APIs.
We will provide ongoing updates on this page. For any inquiries, please contact us at support@sinch.com.
Components affected
Sinch SMS Sinch REST - US Sinch REST - EU Sinch REST - AU Sinch REST - CA Sinch REST - BRTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
2 days ago - at 05/06/2026 05:17PM
This incident has been resolved.
Incident Start Time: 2026-05-05 07:00 UTC
Incident End Time: 2026-05-06 16:16 UTC
MONITORING
2 days ago - at 05/06/2026 04:22PM
A fix has been implemented and we are monitoring the results.
INVESTIGATING
2 days ago - at 05/06/2026 02:33PM
We are currently experiencing an issue with our Conversation and REST APIs.
Incident Start Time: 2026-05-05 07:00 UTC
Impact: A subset of Delivery Receipts for concatenated messages will receive an unknown state if submitted via the Conversation or REST APIs.
We will provide ongoing updates on this page. For any inquiries, please contact us at support@sinch.com.
Latest Sinch outages
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Delivery Issue Guatemala - Tigo - 2 days ago
DI SMS 365 (iSMS) | Operator Services | Potential delay in delivery of MO, MT and DR | TT#MNOC-64082 - 2 days ago
Delivery Issue Guatemala - Tigo - 3 days ago
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