1NIP-982======34HTTP Auth5---------67`draft` `optional`89This NIP defines an ephemeral event used to authorize requests to HTTP servers using nostr events.1011This is useful for HTTP services which are built for Nostr and deal with Nostr user accounts.1213## Nostr event1415A `kind 27235` (In reference to [RFC 7235](https://www.rfc-editor.org/rfc/rfc7235)) event is used.1617The `content` SHOULD be empty.1819The following tags MUST be included.2021* `u` - absolute URL22* `method` - HTTP Request Method2324Example event:25```json26{27 "id": "fe964e758903360f28d8424d092da8494ed207cba823110be3a57dfe4b578734",28 "pubkey": "63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed",29 "content": "",30 "kind": 27235,31 "created_at": 1682327852,32 "tags": [33 ["u", "https://api.snort.social/api/v1/n5sp/list"],34 ["method", "GET"]35 ],36 "sig": "5ed9d8ec958bc854f997bdc24ac337d005af372324747efe4a00e24f4c30437ff4dd8308684bed467d9d6be3e5a517bb43b1732cc7d33949a3aaf86705c22184"37}38```3940Servers MUST perform the following checks in order to validate the event:411. The `kind` MUST be `27235`.422. The `created_at` timestamp MUST be within a reasonable time window (suggestion 60 seconds).433. The `u` tag MUST be exactly the same as the absolute request URL (including query parameters).444. The `method` tag MUST be the same HTTP method used for the requested resource.4546When the request contains a body (as in POST/PUT/PATCH methods) clients SHOULD include a SHA256 hash of the request body in a `payload` tag as hex (`["payload", "<sha256-hex>"]`), servers MAY check this to validate that the requested payload is authorized.4748If one of the checks was to fail the server SHOULD respond with a 401 Unauthorized response code.4950Servers MAY perform additional implementation-specific validation checks.5152## Request Flow5354Using the `Authorization` HTTP header, the `kind 27235` event MUST be `base64` encoded and use the Authorization scheme `Nostr`5556Example HTTP Authorization header:57```58Authorization: Nostr 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```6162## Reference Implementations63- C# ASP.NET `AuthenticationHandler` [NostrAuth.cs](https://gist.github.com/v0l/74346ae530896115bfe2504c8cd018d3)