There are several solutions depending on what you need... If you want to add a custom header (or set of headers) to an individual request then just add the headers property: // Request with custom header $.ajax({ url: 'foo/bar', headers: { 'x-my-custom-header': 'some value' } }); If you want to add a default header (or set of headers) to every request then use $.ajaxSetup(): $.ajaxSetup({ headers:

