Academic papers
How much scholarly metadata each source can return — arXiv, PubMed and Crossref.
Coverage
How many records the source can return in a single request (record_count).
1
PubMed
5,681,793 - 2 Crossref507,885
- 3 arXiv194,584
Freshness
Days since the latest record in the dataset — lower means more recent.
1
PubMed
0 days - 2 Crossref0 days
- 3 arXiv2057 days
Free & open
Static annotation — these are public, free data sources. No key needed.
1
arXiv
Free - 2 CrossrefFree
- 3 PubMedFree
- 4 Semantic ScholarFree
Overall
Weighted score out of 100 — coverage 60%, freshness 40% (missing dims skipped).
1
PubMed
100/100 - 2 Crossref coverage 28 · freshness 10057/100
- 3 arXiv coverage 0 · freshness 00/100
Platform details
per source| provider | Records | Freshness | Access | Data time |
|---|---|---|---|---|
| arXiv | 194,584 | 2057 days | Free | 2026-08-16 11:25:13 |
| Crossref | 507,885 | 0 days | Free | 2026-08-16 11:26:15 |
| PubMed | 5,681,793 | 0 days | Free | 2026-08-16 11:25:14 |
| Semantic Scholar | — | — | Free | 2026-08-16 11:26:22 |
4 rows · snapshot 2026-08-16 11:26:22 · from data/public/open_data.json
How to read this page
All rankings are computed from public daily snapshots — verify any result against the source feed below.
- Overall score weights: coverage 60% · freshness 40%. Missing dims are skipped and renormalized; fewer than two dims means no overall score.
Feeds: prices.json · measurements.json · open_data.json · snapshot Aug 16, 2026, 01:47 PM