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Helix (Imperial College London, launched 2025-26)
helix.imperial.ac.ukNewly launched institutional repository (InvenioRDM, replaced Spiral's data function)storage/helixJSONcomparereport an errorprovider JSON
- Free allowance
- No published per-record or per-user quota; the live API already serves a 13.58 GB single object and four objects over 6 GB, so per-object caps are at least ~14 GB.
- Verdict
- fails: identitythe identity required is not reachable without it
- Cost
- free tier
- Identity
- institutionno 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 published per-record or per-user quota; the live API already serves a 13.58 GB single object and four objects over 6 GB, so per-object caps are at least ~14 GB. 40 records total — a very new instance. unit objects; metered on unstated |
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| Price | none stated |
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| Limits | - retention-clamped Retention minimum 10 years source
- per-object-cap single object and four objects over 6 GB source
No published byte cap. Retention minimum 10 years. Personal/sensitive data refused outright. |
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| Identity | institution institution |
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| Egress | Free, anonymous. |
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| Per-object cap | single object and four objects over 6 GB (6000000000 bytes) |
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| Retention | Retention minimum 10 years (3650 days) |
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| Interface | rest InvenioRDM REST, DOI minting, embargoes, restricted records. |
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| Tooling | curl. |
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| Composes with | InvenioRDM shim. |
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| Reliability | Deposit is for 'research staff and students affiliated with' Imperial. Login page offers only email — the SSO is behind it. |
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| Parsed numbers | - has-free-tier 1
- per-object-cap 6 GB
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Evidence 4
More fields 1
| dead end | {"failure_class": "quota","why": "No published per-record or per-user quota; the live API already serves a 13.58 GB single object and four objects over 6 GB, so per-object caps are at least ~14 GB. 40 records total — a very new instance.","retry_when": null,"first_recorded": "2026-10-21"} |
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Unknown values 2
- per object cap notes: 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