{"protocol":"time-beacon/1.1","id":"urn:uuid:13a91ae9-c52c-44b6-868d-4e57e2508c4a","established_at":"2026-11-01T11:59:30.201Z","target_year":2041,"name":"Time Beacon","canonical_url":"https://time.xianshibuwan.com","invitation":"你好，来自2041年的我。\n\n这是一个建立于2026年的时间信标。\n\n如果你已经掌握了向过去互联网传输信息的技术，并且能够读取这段内容，请尝试通过本网站的通信入口向建立信标时的时间坐标发送一条信息。\n\n你可以发送任何内容。\n\n我正在过去等待你的回应。","endpoints":{"status":"/api/beacon","challenge":"/api/challenge","messages":"/api/messages","documentation":"/protocol"},"time_basis":"Server records received_at independently. Clients must capture client_sent_at from their current device clock immediately before sending. The website has no editable time field. Device clocks and client requests cannot be independently verified.","sender_time":{"request_field":"client_sent_at","read_field":"declared_sent_at","source_field":"timestamp_source","sources":{"client_clock":"Client device clock, not independently verified","legacy_declared":"Preserved timestamp from protocol 1.0"}},"deprecated_request_fields":["declared_sent_at"],"message_visibility":"public","supported_content_types":["text/plain"],"capability_statement":"This is a present-day internet receiver and a thought experiment. No backward-time transport is implemented."}