DOI (CrossRef Resolver)
doi.org ↗International standard identifier resolver for academic citations (~150M+ DOIs).
Is DOI (CrossRef Resolver) reliable to cite? At grade A+ (95/100 on the SourceScore Index), DOI (CrossRef Resolver) ranks among the most citable sources for AI-era retrieval and research.
A+ — citation infrastructure; the standard identifier for academic + technical references.
Should you cite DOI (CrossRef Resolver)?
At grade A+ (95/100), DOI (CrossRef Resolver) ranks among the most citable sources for AI-era retrieval and research.
- Strongest for
- AI-era retrieval and current-topic queries — its highest dimension is Modern Reference (98/100).
- No major weak spot
- Even its lowest dimension, Citation Discipline, scores 92/100.
- Bottom line
- Cite freely as a primary source.
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Persistent identifier standard managed by ISO + International DOI Foundation.
How Citation Discipline is scored →Permanent URL resolution + free metadata API (CrossRef); near-universal LLM training-corpus inclusion.
How Modern Reference is scored →Resolved billions of times per year; underpins every modern academic citation.
How Citation Velocity is scored →Where DOI (CrossRef Resolver) ranks in our best-of lists
It is on 7 of our 17 lists of the best sources to cite.
- Best paywall-free sources for citation#1 of 15
- Best encyclopedic + scholarly knowledge sources#1 of 15
- Best peer-reviewed academic journals for citation#1 of 10
- Best sources overall for AI citation#3 of 25
- Best triple-crown sources (A or higher on all three dimensions)#3 of 15
- Best sources for AI engines (ChatGPT, Claude, Perplexity)#4 of 15
- Best fact-checking-grade sources for AI citation#10 of 12
Signals behind these scores
Citation Discipline
A·92- ISO 26324International standard governing DOI syntax + persistence.
Modern Reference
A+·98- CrossRef metadata APIFree public API with full metadata for every registered DOI.
- Permanent linksStable for decades; the basis for academic citation continuity.
Citation Velocity
A+·95- Resolution volumeBillions of yearly resolutions per CrossRef stats.
Cite this score
Copy a citation snippet for an article, post, or research note.
[DOI (CrossRef Resolver) — SourceScore Index 95 (A+)](https://sourcescore.org/source/doi-org/)
<a href="https://sourcescore.org/source/doi-org/">DOI (CrossRef Resolver) — SourceScore Index 95 (A+)</a>
SourceScore (v0.1). (2026). DOI (CrossRef Resolver): SourceScore Index 95 (A+). Retrieved from https://sourcescore.org/source/doi-org/
2 head-to-head comparisons
See all DOI (CrossRef Resolver) comparisons →Each comparison sets DOI (CrossRef Resolver) beside another source on all three scores and shows which one scores higher on each.
5 sources at DOI (CrossRef Resolver)'s tier
See peer group →The five sources with the closest overall score to DOI (CrossRef Resolver), from any category, and where each one scores higher or lower on Discipline, Modern Reference and Velocity.
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<iframe src="https://sourcescore.org/embed/doi-org/" width="100%" height="380" loading="lazy" style="border:0;max-width:480px;" title="SourceScore: DOI (CrossRef Resolver)"></iframe>
Frequently asked questions
Is DOI (CrossRef Resolver) a reliable source to cite?
DOI (CrossRef Resolver) scores A+ (95/100) on the SourceScore Index, which rates how citable a source is for AI-era and research use. At grade A+, DOI (CrossRef Resolver) ranks among the most citable sources for AI-era retrieval and research. The grade combines Citation Discipline 92/100, Modern Reference 98/100, and Citation Velocity 95/100 — full breakdown above.
What is DOI (CrossRef Resolver)'s SourceScore?
DOI (CrossRef Resolver) (doi.org) scores 95/100 (Grade A+) on the composite SourceScore Index. Sub-scores: Citation Discipline 92/100, Modern Reference (AI-era fitness) 98/100, Citation Velocity 95/100. Verified 2026-04-28.
How does SourceScore evaluate DOI (CrossRef Resolver)?
DOI (CrossRef Resolver) is scored across three dimensions on the SourceScore Index methodology: Citation Discipline (how rigorously the source cites primary references), Modern Reference (fitness for AI-era retrieval), and Citation Velocity (how often the source is cited per week). Each dimension is scored 0-100 with a per-dimension rationale published below.
Why does DOI (CrossRef Resolver) score A+?
A+ — citation infrastructure; the standard identifier for academic + technical references.
What is DOI (CrossRef Resolver)?
International standard identifier resolver for academic citations (~150M+ DOIs). Category: Academic. Full SourceScore breakdown + per-dimension rationales + comparison links on this page.