美辰云盘

Free allowance: Anonymous guest read of 11 root entries; no account and no payment
Verdict: fails: egressdata cannot be read back out at a usable rate or price
Cost: free tier
Identity: anonymousno card, no phone
Binding limit: write-gatedwrite accepted but the read-back is signed
Evidence: measured4 sources; a live request was made and its output kept
Freshness: stale on 2026-11-13checked 2026-10-22 (live); stale on 2026-11-13

Free tier	anonymous guest read of 11 root entries; no account and no payment unit unlimited; metered on none
Price	none stated
Limits	write-gated (binding) write accepted but the read-back is signed
Identity	anonymous not published
Egress	served through nginx; the reader pays nothing
Interface	rest, webdav rest
Composes with	a fetch substrate: point a cache and two mirrors at it, never a write tier
Reliability	The read-gated write. PUT returns code 200 with message success, and GET /p/ then returns 51 bytes of code 401 expire missing: the instance signs its raw path and a guest cannot mint the signature. Provider 139Yun. The bytes went in and cannot come out.
Parsed numbers	has-free-tier 1

Evidence 4

date	source	what it proved
2026-10-22	probe: `https://pan.ios98.com/api/public/settings`	HTTP 200, JSON carrying a code field, site_title '美辰云盘'
2026-10-22	probe: `https://pan.ios98.com/api/fs/list`	anonymous POST /api/fs/list on / returned code 200 with 11 root entries; write:true, write_content_bypass:None, provider:139Yun
2026-10-22	probe: `https://pan.ios98.com/api/fs/put`	the zero-byte oracle returned code 403 with message 'file exists', so the write permission passed and nothing was written
2026-10-22	probe: `https://pan.ios98.com/p/`	GET /p/<the written path> returned HTTP 200 with 51 bytes of code 401 'expire missing' instead of the 32 bytes written

More fields 12