54454: Sync: Invalid 'PageSize' query parameter

This error occurs when the PageSize query parameter in a Sync list request is invalid. PageSize must be an integer from 1 to 1000.

• The request sends a PageSize value smaller than 1
• The request sends a PageSize value larger than 1000
• The request sends a non-numeric PageSize value
• The request sends PageSize in an invalid format, such as a decimal or empty value

• Update your request so PageSize is an integer between 1 and 1000
• Check the code that builds your query string and confirm it passes PageSize as a valid numeric value
• Validate user input before sending the request to prevent out-of-range or malformed values
• If you do not need a custom page size, remove the PageSize parameter and use the default pagination behavior

• Twilio Sync documentation
• Sync API reference