{"rid":"storage/materials-cloud-archive","card":{"rid":"storage/materials-cloud-archive","eid":"materialscloud","topic":"storage","slug":"materials-cloud-archive","provider":"Materials Cloud Archive (EPFL / NCCR MARVEL)","url":"https://archive.materialscloud.org","domain":"materialscloud.org","category":"academic","tier":null,"verdict":"qualifies-with-caveat","vorder":1,"grp":"usable","confidence":"reported","binding":"per-object-cap","identity_kind":"anonymous","identity_basis":"stated","needs_card":0,"needs_phone":0,"needs_id":0,"needs_institution":0,"country":null,"crypto":null,"interfaces":"rest","egress_metered":0,"per_object_bytes":5000000000,"retention_days":null,"verified_at":"2026-10-21T00:00:00.000Z","verified_basis":"inherited","checked_on":"2026-10-21","stale_on":"2026-11-04","n_evidence":3,"usd_month":null,"usd_per_tb_month":null,"summary":"Per-record, not per-account: '5 GB for general materials science research data, 50 GB for AiiDA databases. For larger datasets please contact us.' Records ar...","duplicate_of":null,"n_unknown":5},"record":{"topic":"storage","slug":"materials-cloud-archive","provider":"Materials Cloud Archive (EPFL / NCCR MARVEL)","url":"https://archive.materialscloud.org","category":"academic","free_tier":{"stated":"Per-record, not per-account: '5 GB for general materials science research data, 50 GB for AiiDA databases. For larger datasets please contact us.' Records are unlimited and each gets a DOI, so this is a per-record-unlimited pattern rather than a 500 GB single-shot store.","unit":"GB","metered_on":"stored-bytes","source_url":"https://archive.materialscloud.org/information","read_on":"2026-10-21","notes":null},"per_object_cap":{"stated":"Per-object-cap 5 GB","bytes":5000000000,"source_url":"https://archive.materialscloud.org/information","notes":"not stated"},"retention":{"stated":"not stated","source_url":"https://archive.materialscloud.org/information","notes":"not stated"},"egress":{"terms":"Free, and unusually well-instrumented: 'Access to metadata and data files is provided over standard protocols such as HTTP and OAI-PMH.' No metering. Probe: GET /record/2026.196 -> 200, 90,945 bytes of record page.","metered":false},"interface":["rest"],"interface_detail":"rest","tooling":"Email self-registration with a personal work area; HTTP + OAI-PMH read; DOI minting per record; versioning of published records. AiiDA provenance integration is the native client for the 50 GB tier.","chaining":"Unlimited records x 5 GB (or 50 GB for AiiDA databases). 100 records at 5 GB = 500 GB; the 50 GB AiiDA tier halves that to 10 records.","limits":[{"kind":"write-gated","value":"reviewed by the Materials Cloud moderators'), scope-gated to computational materials sci","source":"https://archive.materialscloud.org/information"},{"kind":"per-object-cap","value":"Per-object-cap 5 GB","source":"https://archive.materialscloud.org/information"}],"limits_note":"Per-object-cap 5 GB / 50 GB per record; moderation gate ('Once you submit your record for publication it will be reviewed by the Materials Cloud moderators'), scope-gated to computational materials science, and moderators explicitly police 'excessive submission rate'.","identity_cost":{"kind":"anonymous","detail":"derived from the record's prose, not from an identity field, and no signup was executed: -quality requirement) and rate-policed — the opposite of an anonymous dump. Data survives; throughput is editorially throttled. Unlimited records x 5 GB (or 50 GB for AiiDA databases). 100","country":null},"reliability_note":"EPFL-hosted and stable, but moderation is substantive (refereeable-quality requirement) and rate-policed — the opposite of an anonymous dump. Data survives; throughput is editorially throttled.","confidence":"reported","confidence_note":"One page read moves it to documented.","evidence":[{"url":"https://archive.materialscloud.org/information","date":"2026-10-21","proved":"'Volume and size limitations: 5 GB for general materials science research data, 50 GB for AiiDA databases. For larger datasets please contact us'"},{"url":"https://archive.materialscloud.org/help","date":"2026-10-21","proved":"'By registering with your email to the Materials Cloud Archive...' (open self-registration), moderated before publication"},{"url":null,"date":"2026-10-21","proved":"probe: GET /record/2026.196 -> 200 (90,945 bytes); 1,551 published records live"}],"verdict":"qualifies-with-caveat","verified_at":"2026-10-21T00:00:00.000Z","notes":"Per-record, not per-account: '5 GB for general materials science research data, 50 GB for AiiDA databases. For larger datasets please contact us.' Records are unlimited and each gets a DOI, so this is a per-record-unlimited pattern rather than a 500 GB single-shot store.","extras":{},"binding":"per-object-cap","binding_note":"the per-object cap sets the shard size and therefore the object count; it bounds the total more tightly than any headline quota"},"claims":[{"path":"$.free_tier.stated","kind":"free-quota","num":5,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.limits[0].value","kind":"limit:write-gated","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[1].value","kind":"limit:per-object-cap","num":5,"unit":"GB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"}],"unknown":[["$.evidence[2].url","private-url"],["$.free_tier.notes","process"],["$.per_object_cap.notes","not-extracted"],["$.retention.notes","not-extracted"],["$.retention.stated","not-extracted"]],"history":[],"drift":[{"kind":"duplicate-disagrees","subject":"storage/materials-cloud-archive","other":"storage/materials-cloud-archive-2","field":"verdict","a":"qualifies-with-caveat","b":"fails-quota","detail":null},{"kind":"duplicate-disagrees","subject":"storage/materials-cloud-archive","other":"storage/materials-cloud-archive-2","field":"identity_kind","a":"anonymous","b":"email","detail":null}]}