mastodonapp.uk / mstdn.social / mastodon.social and the stoc

mastodonapp.uk · Storage · 1 record · JSON

mastodonapp.uk / mstdn.social / mastodon.social and the stock-Mastodon mass — 100 MiB per object, unlimited per account Storage

fails: quotainstitutionno cardRper-object-cap

mastodonapp.uk · fediverse-mastodon · storage/mastodonapp-uk-mstdn-social-mastodon-social-and-the-stoc · JSON · compare

Free tier	Per-account UNLIMITED. Per-file: 103809024 bytes = 99 MiB (video), 16 MiB image on almost every stock instance. mastodonapp.uk raises the IMAGE cap to 99 MiB too, which is the unusual bit. unit unlimited; metered on unstated
Price	none stated
Per-object cap	Per-file: 103809024 bytes = 99 MiB (103809024 bytes)
Retention	not stated
Egress	Free. Media is offloaded to plain S3-compatible buckets behind the instance domain — verified on two live instances: mastodon.world serves from `s3.eu-central-2.wasabisys.com/mastodonworld/...` (Wasabi), mstdn.jp serves from `img.mstdn.jp/media_attachments/files/...`.
Identity	institution derived from the record's prose, not from an identity field, and no signup was executed: min / user; 8 attachments per status; 1,500 authenticated API calls / 5 min. fediverse-mastodon
Limits	per-object-cap Per-file: 103809024 bytes = 99 MiB source per-object-cap 99 MiB video / 16 MiB image typical; per-account unlimited; request-rate 30 uploads / 30 min / user; 8 attachments per status; 1,500 authenticated API calls / 5 min.
Binding	per-object-cap the per-object cap sets the shard size and therefore the object count; it bounds the total more tightly than any headline quota
Interface	rest, cli rest
Tooling	Mastodon REST API v1; `toot` CLI; Mastodon.py; Mastodon-API clients in every language.
Composes with	THE quantity finding of this slot. Stock Mastodon has no per-account media quota — only a per-file validator. So a Mastodon account is a per-object-capped, per-account-unlimited store whose only real ceiling is (a) 30 uploads/30 min and (b) the operator's disk. There are thousands of open-registration instances. 1,000 instances x 99 MiB/object x 1,440 uploads/day is not the right sum; the right sum is 'each account is bounded by rate, not bytes', which makes the fediverse a permanent, free, CDN-fronted write target of effectively instance-disk size.
Reliability	Registration state varies per instance and flips often — mastodon.social, mstdn.social, mstdn.jp, mastodon.world, mastodon.gamedev.place all reported registrations=true at probe time; mas.to, fosstodon.org, chaos.social, toot.community, mastodon.online reported false. Re-probe before relying on any one.
Notes	Per-account UNLIMITED. Per-file: 103809024 bytes = 99 MiB (video), 16 MiB image on almost every stock instance. mastodonapp.uk raises the IMAGE cap to 99 MiB too, which is the unusual bit.
Evidence rung	reported One page read moves it to documented.
Checked	2026-10-21 (inherited); stale on 2026-11-04
Parsed numbers	`$.limits[0].value` limit:per-object-cap 99.0 MiB

Evidence (5)

date	source	what it proved
2026-10-21	mastodonapp.uk/api/v2/instance	probe: GET -> 200, image_size_limit=103809024, video_size_limit=103809024, registrations.enabled=true
2026-10-21	mastodon.social/api/v2/instance	probe: GET -> 200, image_size_limit=16777216, video_size_limit=103809024, registrations.enabled=true
2026-10-21	mstdn.jp/api/v2/instance	probe: GET -> 200, 16777216/103809024, registrations.enabled=true
2026-10-21	mastodon.world	probe: HEAD media URL -> 200, image/png, 1640544 bytes, Cache-Control: public, max-age=315576000, immutable; origin URL = s3.eu-central-2.wasabisys.com/mastodonworld/media_attachments/files/117/479/508/370/053...
2026-10-21	img.mstdn.jp/media_attachments/files/117/478/448/419/166/526	probe: HEAD ... -> 200, image/png, 1557834 bytes, Cache-Control: public, max-age=315576000, immutable

More fields (2)

{
 "verdict_note": "PLAN.md §3.2 rules fails-quota by default, because no row in this set clears 500 GiB per unit for a user.",
 "dead_end": {
  "failure_class": "quota",
  "why": "Per-account UNLIMITED. Per-file: 103809024 bytes = 99 MiB (video), 16 MiB image on almost every stock instance. mastodonapp.uk raises the IMAGE cap to 99 MiB too, which is the unusual bit.",
  "retry_when": null,
  "first_recorded": "2026-10-21"
 }
}

Unknown or withheld values (5)

$.extras.dead_end.retry_when process
$.free_tier.notes process
$.per_object_cap.notes not-extracted
$.retention.notes not-extracted
$.retention.stated not-extracted