{"json_modified": "2016-10-20T02:46:43.304442", "uuid": "7920c698-359b-41dc-bcca-0c1023d9334a", "title": "Access-Control-Allow-Headers", "url": "/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Headers", "tags": ["Reference", "header", "CORS", "HTTP"], "translations": [], "modified": "2016-10-20T02:46:43", "label": "Access-Control-Allow-Headers", "localization_tags": [], "locale": "en-US", "id": 196409, "last_edit": "2016-10-20T02:46:36", "summary": "The <strong><code>Access-Control-Allow-Headers</code></strong> response header is used in response to a <a class=\"glossaryLink\" href=\"/en-US/docs/Glossary/preflight_request\" title=\"preflight request: A CORS preflight request is a CORS request that checks to see if the CORS protocol is understood.\">preflight request</a> to indicate which HTTP\u00a0headers will be available via <a href=\"/en-US/docs/Web/HTTP/Headers/Access-Control-Expose-Headers\" title=\"The Access-Control-Expose-Headers response header indicates which headers can be exposed as part of the response by listing their names.\"><code>Access-Control-Expose-Headers</code></a> when making the actual request.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Directives", "title": "Directives"}, {"id": "Examples", "title": "Examples"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "Compatibility_notes", "title": "Compatibility notes"}, {"id": "See_also", "title": "See also"}], "slug": "Web/HTTP/Headers/Access-Control-Allow-Headers", "review_tags": []}