{"dataset":{"id":"9726a93b-37b8-4408-b83a-b3ec9b5d988b","slug":"http-field-names","name":"HTTP field names (IANA registry)","description":"Registered HTTP field (header and trailer) names from the IANA Hypertext Transfer Protocol (HTTP) Field Name Registry, one document per name with its status, structured type, and defining reference.","visibility":"public","version":260,"documentCount":259,"createdAt":"2026-10-04T00:50:21.000Z","updatedAt":"2026-10-04T01:19:08.000Z","publisher":"Koskamo","license":"IANA HTTP Field Name Registry (iana.org/assignments/http-fields); registry data reproduced verbatim with references","reviewedAt":"2026-10-04T01:19:25.000Z"},"total":259,"documents":[{"id":"dc689557-4bd6-4c86-8590-d53c194e7892","title":"A-IM","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:50:28.000Z","updatedAt":"2026-10-04T00:50:28.000Z","text":"A-IM is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 3229: Delta encoding in HTTP"},{"id":"05ceda65-ef7c-4802-83cd-685aea9b3c0c","title":"Accept","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:50:35.000Z","updatedAt":"2026-10-04T00:50:35.000Z","text":"Accept is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 12.5.1: HTTP Semantics"},{"id":"908c55e0-c307-42f8-9d75-57e13c92dbb3","title":"Accept-Additions","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:50:41.000Z","updatedAt":"2026-10-04T00:50:41.000Z","text":"Accept-Additions is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 2324: Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0)"},{"id":"01512a8f-c351-4936-9a54-aef1816e45bd","title":"Accept-CH","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:50:48.000Z","updatedAt":"2026-10-04T00:50:48.000Z","text":"Accept-CH is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: List\n- Defined in: RFC 8942, Section 3.1: HTTP Client Hints"},{"id":"5d77ac0b-4c02-4867-86e1-d56c775efcf9","title":"Accept-Charset","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:50:55.000Z","updatedAt":"2026-10-04T00:50:55.000Z","text":"Accept-Charset is a deprecated HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: deprecated\n- Defined in: RFC 9110, Section 12.5.2: HTTP Semantics"},{"id":"73052e21-b9b8-4518-bc36-668d6352668f","title":"Accept-Datetime","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:01.000Z","updatedAt":"2026-10-04T00:51:01.000Z","text":"Accept-Datetime is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 7089: HTTP Framework for Time-Based Access to Resource States -- Memento"},{"id":"593df1f5-f3ab-4521-bcfb-4e44db91d6e2","title":"Accept-Encoding","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:08.000Z","updatedAt":"2026-10-04T00:51:08.000Z","text":"Accept-Encoding is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 12.5.3: HTTP Semantics"},{"id":"85719737-7523-47ba-ae21-e7ec1f282b44","title":"Accept-Features","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:15.000Z","updatedAt":"2026-10-04T00:51:15.000Z","text":"Accept-Features is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 2295: Transparent Content Negotiation in HTTP"},{"id":"734f0e57-c6e4-4dfb-91af-d94e41000a19","title":"Accept-Language","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:21.000Z","updatedAt":"2026-10-04T00:51:21.000Z","text":"Accept-Language is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 12.5.4: HTTP Semantics"},{"id":"b519cc76-a4f1-4e04-9422-d93f5445d1fd","title":"Accept-Patch","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:28.000Z","updatedAt":"2026-10-04T00:51:28.000Z","text":"Accept-Patch is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 5789: PATCH Method for HTTP"},{"id":"5eb1f791-3728-42e2-a7f8-0f8a0a18583d","title":"Accept-Post","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:35.000Z","updatedAt":"2026-10-04T00:51:35.000Z","text":"Accept-Post is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Linked Data Platform 1.0"},{"id":"791e9cb7-8b7b-442a-8a75-a13ccd77661e","title":"Accept-Query","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:41.000Z","updatedAt":"2026-10-04T00:51:41.000Z","text":"Accept-Query is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: List\n- Defined in: RFC 10008, Section 3: The HTTP QUERY Method"},{"id":"5797f5a6-791a-4fe3-a4bc-05a63125145f","title":"Accept-Ranges","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:48.000Z","updatedAt":"2026-10-04T00:51:48.000Z","text":"Accept-Ranges is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 14.3: HTTP Semantics"},{"id":"8644ef12-140a-4fe4-a56e-87121302ee2a","title":"Accept-Signature","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:51:54.000Z","updatedAt":"2026-10-04T00:51:54.000Z","text":"Accept-Signature is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9421, Section 5.1: HTTP Message Signatures"},{"id":"fdcb9ba8-c89b-455c-8e44-de300ba2d2c3","title":"Access-Control","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:01.000Z","updatedAt":"2026-10-04T00:52:01.000Z","text":"Access-Control is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: obsoleted\n- Defined in: Access Control for Cross-site Requests"},{"id":"d7a37dd7-ccbd-47c7-9a6a-d3642d5969cf","title":"Access-Control-Allow-Credentials","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:08.000Z","updatedAt":"2026-10-04T00:52:08.000Z","text":"Access-Control-Allow-Credentials is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"7974ab25-8e9e-4963-bd14-a0831071b715","title":"Access-Control-Allow-Headers","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:14.000Z","updatedAt":"2026-10-04T00:52:14.000Z","text":"Access-Control-Allow-Headers is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"646ac5e8-8db8-43c2-a69e-768f5b1312a8","title":"Access-Control-Allow-Methods","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:21.000Z","updatedAt":"2026-10-04T00:52:21.000Z","text":"Access-Control-Allow-Methods is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"c5cc5af8-d434-4899-8e34-2a54d3b2c93a","title":"Access-Control-Allow-Origin","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:28.000Z","updatedAt":"2026-10-04T00:52:28.000Z","text":"Access-Control-Allow-Origin is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"11223686-df27-47f1-a013-41c8d4441628","title":"Access-Control-Expose-Headers","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:34.000Z","updatedAt":"2026-10-04T00:52:34.000Z","text":"Access-Control-Expose-Headers is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"8f1f8fae-dcd8-4ac5-afc8-769455ad45b2","title":"Access-Control-Max-Age","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:41.000Z","updatedAt":"2026-10-04T00:52:41.000Z","text":"Access-Control-Max-Age is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"c769ef58-5775-4726-86b0-b14f520a49eb","title":"Access-Control-Request-Headers","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:48.000Z","updatedAt":"2026-10-04T00:52:48.000Z","text":"Access-Control-Request-Headers is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"8dc550e6-8fc8-4843-9195-f5898fcd57a0","title":"Access-Control-Request-Method","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:52:54.000Z","updatedAt":"2026-10-04T00:52:54.000Z","text":"Access-Control-Request-Method is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: Fetch"},{"id":"f7b026db-2e5f-444d-ab8c-929881e805dd","title":"Activate-Storage-Access","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:01.000Z","updatedAt":"2026-10-04T00:53:01.000Z","text":"Activate-Storage-Access is a provisional HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: provisional\n- Structured type: Item\n- Defined in: https://privacycg.github.io/storage-access-headers"},{"id":"745f142f-617a-40a2-85bb-86f4e46298e1","title":"Age","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:08.000Z","updatedAt":"2026-10-04T00:53:08.000Z","text":"Age is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9111, Section 5.1: HTTP Caching"},{"id":"50109eda-0c4e-4615-b45e-29114772ab26","title":"Allow","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:14.000Z","updatedAt":"2026-10-04T00:53:15.000Z","text":"Allow is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 10.2.1: HTTP Semantics"},{"id":"dd2f6a4a-1f98-4ee6-9061-5ec06b812ff1","title":"ALPN","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:21.000Z","updatedAt":"2026-10-04T00:53:21.000Z","text":"ALPN is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 7639, Section 2: The ALPN HTTP Header Field"},{"id":"f5508001-e73a-4a20-8f56-5db24947ae85","title":"Alt-Svc","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:28.000Z","updatedAt":"2026-10-04T00:53:28.000Z","text":"Alt-Svc is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 7838: HTTP Alternative Services"},{"id":"7b059837-8752-42c2-9008-da2961184447","title":"Alt-Used","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:35.000Z","updatedAt":"2026-10-04T00:53:35.000Z","text":"Alt-Used is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 7838: HTTP Alternative Services"},{"id":"55e9ccd4-14ef-43e8-b90a-cfdd62082cbd","title":"Alternates","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:41.000Z","updatedAt":"2026-10-04T00:53:41.000Z","text":"Alternates is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 2295: Transparent Content Negotiation in HTTP"},{"id":"e1a958f1-ac92-490f-b13b-36d0f0b5ed98","title":"AMP-Cache-Transform","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:48.000Z","updatedAt":"2026-10-04T00:53:48.000Z","text":"AMP-Cache-Transform is a provisional HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: provisional\n- Defined in: AMP-Cache-Transform HTTP request header"},{"id":"0d9c834b-3f24-413c-ab18-6312a2c3e44d","title":"Apply-To-Redirect-Ref","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:53:54.000Z","updatedAt":"2026-10-04T00:53:55.000Z","text":"Apply-To-Redirect-Ref is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 4437: Web Distributed Authoring and Versioning (WebDAV) Redirect Reference Resources"},{"id":"51717839-9f5e-40a4-a85b-ac8fef95eafe","title":"Authentication-Control","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:01.000Z","updatedAt":"2026-10-04T00:54:01.000Z","text":"Authentication-Control is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 8053, Section 4: HTTP Authentication Extensions for Interactive Clients"},{"id":"fff72a1f-3e52-4309-b227-5cba8c21addc","title":"Authentication-Info","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:08.000Z","updatedAt":"2026-10-04T00:54:08.000Z","text":"Authentication-Info is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 11.6.3: HTTP Semantics"},{"id":"f70e62b1-e8de-467e-8048-24e2fc6b6ae0","title":"Authorization","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:14.000Z","updatedAt":"2026-10-04T00:54:14.000Z","text":"Authorization is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9110, Section 11.6.2: HTTP Semantics"},{"id":"2cd385b1-7433-4839-ad4a-758ad3d1eca4","title":"Available-Dictionary","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:21.000Z","updatedAt":"2026-10-04T00:54:21.000Z","text":"Available-Dictionary is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: Item\n- Defined in: RFC 9842, Section 2.2: Compression Dictionary Transport"},{"id":"50efba77-ab19-4c96-b643-e66d89d50e18","title":"C-Ext","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:28.000Z","updatedAt":"2026-10-04T00:54:28.000Z","text":"C-Ext is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: obsoleted\n- Defined in: RFC 2774: An HTTP Extension Framework\n- Comments: [Status change of HTTP experiments to Historic]"},{"id":"d56216e5-ca7f-495f-946c-45862fd64b94","title":"C-Man","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:35.000Z","updatedAt":"2026-10-04T00:54:35.000Z","text":"C-Man is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: obsoleted\n- Defined in: RFC 2774: An HTTP Extension Framework\n- Comments: [Status change of HTTP experiments to Historic]"},{"id":"c8881291-8517-4e5a-a18c-723e942236b7","title":"C-Opt","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:41.000Z","updatedAt":"2026-10-04T00:54:41.000Z","text":"C-Opt is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: obsoleted\n- Defined in: RFC 2774: An HTTP Extension Framework\n- Comments: [Status change of HTTP experiments to Historic]"},{"id":"1fccc198-7262-4f17-a062-9bc5ce46d20c","title":"C-PEP","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:48.000Z","updatedAt":"2026-10-04T00:54:48.000Z","text":"C-PEP is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: obsoleted\n- Defined in: PEP - an Extension Mechanism for HTTP\n- Comments: [Status change of HTTP experiments to Historic]"},{"id":"62a37320-2831-43e2-9906-d1a965c6a940","title":"C-PEP-Info","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:54:55.000Z","updatedAt":"2026-10-04T00:54:55.000Z","text":"C-PEP-Info is a deprecated HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: deprecated\n- Defined in: PEP - an Extension Mechanism for HTTP\n- Comments: [Status change of HTTP experiments to Historic]"},{"id":"fbbf9b0d-746e-4c05-923b-136b95745896","title":"Cache-Control","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:01.000Z","updatedAt":"2026-10-04T00:55:01.000Z","text":"Cache-Control is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 9111, Section 5.2: HTTP Caching"},{"id":"9b480149-0ed4-4b81-add2-d759bd9bd672","title":"Cache-Group-Invalidation","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:08.000Z","updatedAt":"2026-10-04T00:55:08.000Z","text":"Cache-Group-Invalidation is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: List\n- Defined in: RFC9875: HTTP Cache Groups"},{"id":"b8541ce7-758e-4132-8b5a-0f0eefb325a2","title":"Cache-Groups","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:15.000Z","updatedAt":"2026-10-04T00:55:15.000Z","text":"Cache-Groups is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: List\n- Defined in: RFC9875: HTTP Cache Groups"},{"id":"9c56621f-d443-4f0e-9aea-2b173bffb2c3","title":"Cache-Status","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:21.000Z","updatedAt":"2026-10-04T00:55:21.000Z","text":"Cache-Status is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: List\n- Defined in: RFC 9211: The Cache-Status HTTP Response Header Field"},{"id":"9fda8982-692e-49ca-99e9-cb36239fdc4b","title":"Cal-Managed-ID","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:28.000Z","updatedAt":"2026-10-04T00:55:28.000Z","text":"Cal-Managed-ID is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 8607, Section 5.1: Calendaring Extensions to WebDAV (CalDAV): Managed Attachments"},{"id":"5da54962-1335-439a-8a95-a14de2f4accd","title":"CalDAV-Timezones","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:35.000Z","updatedAt":"2026-10-04T00:55:35.000Z","text":"CalDAV-Timezones is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 7809, Section 7.1: Calendaring Extensions to WebDAV (CalDAV): Time Zones by Reference"},{"id":"f387b1c5-2be1-4f8f-b84e-bb899c2606d9","title":"Capsule-Protocol","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:41.000Z","updatedAt":"2026-10-04T00:55:41.000Z","text":"Capsule-Protocol is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: Item\n- Defined in: RFC 9297: HTTP Datagrams and the Capsule Protocol"},{"id":"7d64e1c0-c0dc-4e50-88f3-05df1625b90a","title":"CDN-Cache-Control","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:48.000Z","updatedAt":"2026-10-04T00:55:48.000Z","text":"CDN-Cache-Control is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Structured type: Dictionary\n- Defined in: RFC 9213: Targeted HTTP Cache Control\n- Comments: Cache directives targeted at content delivery networks"},{"id":"6ddd31f4-86d9-4c11-8771-a77c6da79f98","title":"CDN-Loop","sourceUrl":"https://www.iana.org/assignments/http-fields/http-fields.xhtml","version":1,"createdAt":"2026-10-04T00:55:55.000Z","updatedAt":"2026-10-04T00:55:55.000Z","text":"CDN-Loop is a permanent HTTP field name in the IANA HTTP Field Name Registry.\n\n- Status: permanent\n- Defined in: RFC 8586: Loop Detection in Content Delivery Networks (CDNs)"}]}