{"service":"grd","version":"2.1","endpoints":{"reader":"GET /r?url={url}&format=md|json","files":"GET /f?key={path}&sig={sig}&exp={exp}","presign":"GET /presign?key={path}&expires={seconds}","upload":"POST /upload","upload_page":"GET /upload-page?token={jwt}&lang={zh|en}","upload_from_url":"POST /upload-from-url","platforms":"GET /platforms","health":"GET /health","debug_match":"GET /debug/match?url={url}"}}