80408: Service Sid Invalid

This warning appears when a Proxy request includes a ServiceSid value that Twilio cannot validate as a Proxy Service identifier. Proxy Service resources use SIDs with the KS prefix, and Proxy endpoints use that value as the parent Service identifier.

• The request did not include the required ServiceSid value for a Proxy endpoint that expects a parent Service resource.
• The ServiceSid value does not match the Proxy Service SID format. Proxy Service SIDs use the KS prefix and are 34 characters long.
• You may have used a different resource SID, such as a PN phone number SID, instead of a Proxy Service SID.

• Copy the Service SID from your Proxy Service resource and confirm that it starts with KS and matches the documented SID format before you send the request.
• Pass that value in the required ServiceSid path parameter for the Proxy resource you are calling, such as /Services/{ServiceSid}/PhoneNumbers.
• If you need to confirm the value, fetch the Service directly with GET /v1/Services/{Sid} or list your Services and use the returned Service SID in the next request.

• Proxy API Overview
• Proxy Service resource
• What is a String Identifier (SID)?