Discord cloud uploads (direct-to-GCS, 500 MiB reservation)

Free allowance: Reserve an upload slot with POST /channels/{id}/attachments and PUT the body straight into Discord's Google Cloud Storage bucket — the reservation path accepts up to 500 MiB per file, independent of the 20 MiB message-time limit.
Verdict: caveatusable, with a named limit or an unprobed read path
Cost: free tier
Identity: email?placeholder, not evidence; card unknown, phone unknown
Binding limit: per-object-cap500 MiB per file
Evidence: reported2 sources; a third party said so
Freshness: stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05

Free tier	Reserve an upload slot with `POST /channels/{id}/attachments` and PUT the body straight into Discord's Google Cloud Storage bucket — the reservation path accepts up to 500 MiB per file, independent of the 20 MiB message-time limit. Note the file still hits the per-message limit when you actually send it, so 500 MiB only helps if the channel/boost tier allows it. unit mixed; metered on stored-bytes
Price	none stated
Limits	per-object-cap (binding) 500 MiB per file source 1-10 files per reservation call; `is_clip` flag grants a 100 MiB default; requires same permissions as normal attach; `DELETE /attachments/{upload_filename}` to clean up unused reservations.
Identity	email (placeholder) not published
Egress	Free, unmetered, served from cdn.discordapp.com.
Per-object cap	500 MiB per file (524288000 bytes)
Retention	not stated
Interface	rest rest
Tooling	Documented unofficial-API reference (docs.discord.food, formerly 'userdoccers'); Python pseudocode in the page; used in production by large bots. No dedicated library needed — two HTTP calls.
Composes with	Upload slots are per-channel, so the 500 MiB ceiling multiplies by channel count (500/server) rather than by account.
Reliability	Endpoints are undocumented-but-stable and have moved URL shape before; a reservation you do not consume needs explicit deletion or it lingers.
Parsed numbers	has-free-tier 1 per-object-cap 500 MiB

Evidence 2

date	source	what it proved
2026-10-21	docs.discord.food/topics/cloud-uploads	'This allows you to upload up a file up to 500 MiB directly to Google Cloud. Note that file size limits will still apply when sending the attachment in a message.'
2026-10-21	docs.discord.food/topics/cloud-uploads	'When uploading a clip, an increased default file size limit of 100 MiB applies.'

More fields 1

unit note	free_tier.unit is 'mixed' because the headline is denominated in MiB or KiB, which the schema enum does not carry; the verbatim free_tier.stated keeps the true unit.

Unknown values 3