80403: Interaction Sid Invalid

This warning appears when you send a Proxy request with an invalid Interaction SID. In Proxy, Interactions are read-only communication logs within a Session, and each Interaction SID must be a Twilio-generated value that matches the KI SID pattern.

• The Sid value in your request is not a valid Interaction SID format. Proxy Interaction SIDs must match the KI pattern and be 34 characters long.
• You used a different Proxy SID type in place of an Interaction SID, such as a Service SID with the KS prefix, a Session SID with the KC prefix, or a Participant SID with the KP prefix.
• The Interaction SID was copied incorrectly, truncated, or includes extra characters, which makes it fail Proxy SID validation.
• You are trying to fetch or delete an Interaction without using the correct Proxy resource path for ServiceSid, SessionSid, and Sid.

• Use the Interaction sid returned by Proxy instead of constructing the value yourself. Twilio creates the unique SID for each Interaction resource.
• Validate that the Interaction SID starts with KI and matches the expected 34-character format before sending the request.
• For fetch or delete requests, send the Interaction SID in the /Services/{ServiceSid}/Sessions/{SessionSid}/Interactions/{Sid} path and confirm that the parent ServiceSid and SessionSid are valid Proxy SIDs for the same resource hierarchy.
• If you are not sure which Interaction SID to use, list the Session's Interactions first and then retry the request with the returned sid value.

• Interaction resource
• The Proxy API Overview
• Proxy Quickstart