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Panoramax federation — 25 instances with per-instance `registration_is_open` (ulm / osm-es / seespider / panoramax-ar / osm-hr / osm-be)

api.panoramax.xyz/api/instancesFederated instance poolstorage/panoramax-federation-25-instances-with-per-instance-regiJSON compare report an error provider JSON

Free allowance: No quota on any instance (same codebase, same absence of a quota mechanism).
Verdict: ★ qualifiesusable as stated; the read path was probed
Cost: free tier
Identity: emailno card, no phone
Binding limit: noneno named constraint binds
Evidence: reported4 sources; a third party said so
Freshness: stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05

Free tier	No quota on any instance (same codebase, same absence of a quota mechanism). The federation catalog itself is the useful artifact: `GET /api/instances` returns all 25 instances WITH each one's live configuration, including `registration_is_open`. unit unlimited; metered on unstated
Price	none stated
Identity	email email (OSM OAuth for most; Keycloak self-registration for seespider at auth.pycnogon.xyz; osm-es declares `user_profile.url = null`, i.e. its own local accounts)
Egress	each instance serves its own originals, unmetered, no auth
Per-object cap	not stated
Retention	not stated
Interface	cli one shared STAC/OGC API shape across every instance — the same client works against all of them
Tooling	panoramax_cli --api-url <instance>; `panoramax_cli transfer` moves a sequence between instances without re-uploading from disk
Composes with	Round-robin writes across the open instances; the federated meta-catalog at api.panoramax.xyz indexes all of them, so one search call sees every copy. Multiply capacity by instance count.
Reliability	open=False on 11 of 25 instances (multimodall, bikespace, nl-test, osm-fulda, vee, multimob, serenedeluge, burakonder, mapcomplete, osm-tw). Two instances (mahdi, kasik-gis) have auth disabled entirely — anonymous read, no upload path.
Parsed numbers	has-free-tier 1

Evidence 4

date	source	what it proved
2026-10-21	api.panoramax.xyz/api/instances	25 instances enumerated, each with configuration.auth.registration_is_open
2026-10-21	panoramax-ulm.jjbaur.de/api/configuration	registration_is_open: true, geo_coverage 'Worldwide\nThe picture can be sent from anywhere in the world.'
2026-10-21	panoramax.ign.fr/api/configuration	registration_is_open true, own Keycloak realm, 'Photos must be located in France'
2026-10-21	panoramax.openstreetmap.es/api/configuration	registration_is_open true, user_profile.url = null (instance-local accounts)

Unknown values 4

per object cap notes: the field may be stated in a source that was not read
per object cap stated: the field may be stated in a source that was not read
retention notes: the field may be stated in a source that was not read
retention stated: the field may be stated in a source that was not read