Tobias Zimmergren • 12/26/2012

Fixing: The HTTP header ACCEPT is missing or its value is invalid - SharePoint 2013

This article provides a quick troubleshooting tip for developers encountering the 'HTTP header ACCEPT is missing or its value is invalid' error in SharePoint 2013. It explains that moving from Beta to RTM changed how REST calls work in the client object model. The fix involves updating the 'accept' header in AJAX requests from 'application/json' to 'application/json;odata=verbose'. This helps developers using older example code or migrating projects avoid debugging time.

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#rest api #http headers #ajax