Search. Classify. Map the Evidence.

Search PubMed, Crossref & Europe PMC in one place. Auto-classify studies by evidence level, find Open Access PDFs, measure evidence maturity, and plan your systematic review.

Start Searching — Free
No account required. 3 databases. Real metrics. Auditable.
Everything a researcher needs
From search to systematic review — one platform.
🔍

Multi-Database Search

Search PubMed, Crossref, and Europe PMC simultaneously. Results are deduplicated and unified in one list.

FREE
📊

Study Classification (A-E)

Every article is automatically classified by study design: Meta-Analysis, RCT, Cohort, Case Report, etc. Based on the EBM evidence pyramid.

FREE
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Open Access PDF Detection

8 sources checked per article: PMC, Unpaywall, Europe PMC, publishers, Semantic Scholar, CORE, CrossRef, backend resolver. If a free legal PDF exists, EvidenX finds it.

UNIQUE
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Evidence Maturity Metrics

EMI (maturity), RSC (saturation), PRF (pyramid robustness) — structural descriptors with documented formulas. Component breakdown visible. Fully auditable.

FREE
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Method Engine

7-step wizard to plan systematic reviews: PICO parsing, review type recommendation, framework loading (PRISMA, ROB2, AGREE II, COSMIN), eligibility, extraction schema, synthesis plan.

NEW
🛰️

Watchtower Monitoring

Daily automated PubMed scans across 12 topics. Detects emerging terms, new articles, and trends. Feeds the Lexicon with discovered terminology.

UNIQUE
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Lexicon Intelligence

Self-learning vocabulary that grows with every search. Discovers terms MeSH hasn't indexed yet. Auto-validates via NLM and PubMed. Available as API.

API
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PICO Builder

Structure your research question with Population, Intervention, Comparison, Outcome. Generates optimized search queries automatically.

FREE
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PDF Report Export

Branded PDF with metrics summary, evidence pyramid, article table, DOI links, and methodology reference. Professional, auditable, ready to share.

PAID
How it works
From question to evidence map in seconds.
1

Enter your question

Type freely or build a PICO. Choose Precise, Balanced, or Broad mode.

2

Get classified results

Articles from 3 databases, deduplicated, classified A-E by study design.

3

See the evidence structure

Metrics (EMI, RSC, PRF), evidence pyramid, clusters, gaps identified.

4

Download or plan review

Export PDF/CSV, download OA papers, or launch Method Engine for full review planning.

EvidenX vs. alternatives
FeaturePubMedSemantic ScholarCovidenceEvidenX
Multi-database searchPubMed onlyOwn indexManual import3 databases
Study type classificationNoNoManualAutomatic (A-E)
OA PDF resolutionLink to journalSomeNo8 sources per article
Evidence metricsNoCitation countNoEMI / RSC / PRF
Review planningNoNoScreeningMethod Engine (7 steps)
Literature monitoringEmail alertsFeedNoWatchtower (daily)
Terminology APINoNoNoLexicon API
Free tierYesYesPaid onlyYes
Frequently Asked Questions
What databases does EvidenX search?
EvidenX searches PubMed, Crossref, and Europe PMC simultaneously. Results are automatically deduplicated — if the same article appears in multiple databases, you see it once with the best available metadata.
How does EvidenX find Open Access PDFs?
For each article, EvidenX checks 8 sources: PubMed Central (PMID-to-PMCID conversion), Unpaywall API, Europe PMC full-text URLs, publisher-specific patterns (20+ publishers mapped), Semantic Scholar, CORE repositories, CrossRef license data, and a backend resolver that scrapes landing pages for PDF meta tags. If a free legal version exists anywhere on the internet, EvidenX finds it and gives you a direct download link.
What are EMI, RSC, and PRF?
EMI (Evidence Maturity Index, 0-100) measures how established the evidence base is — based on synthesis presence, design quality, volume, and temporal breadth. RSC (Research Saturation Coefficient, 0-1.0) measures research coverage completeness. PRF (Pyramid Robustness Factor, 0-1.0) measures evidence pyramid structure. All formulas are documented with rationale on the Methodology page.
What is the Method Engine?
A 7-step wizard that helps plan systematic reviews, meta-analyses, and scoping reviews. It parses your research question, recommends a review type, loads the correct frameworks (PRISMA, ROB2, AGREE II, COSMIN, QUADAS-2), generates eligibility criteria, builds an extraction schema, and plans the synthesis approach.
Does EvidenX use AI?
EvidenX uses rule-based classification and keyword matching — not generative AI. All metrics are deterministic, reproducible, and auditable. The system never generates text, never hallucinates data, and never makes clinical recommendations. You can inspect every score's component breakdown and verify the methodology.
Is EvidenX free?
Yes. Search, study classification, evidence metrics, PICO builder, Method Engine, and Watchtower are all free. Paid plans ($10-$159) unlock export (CSV/PDF), batch PDF downloads, AI-assisted analysis, and protocol export. Start searching now.
What is the Lexicon API?
A Clinical Research Intelligence API that provides term expansion, trend detection, gap analysis, and emerging terminology discovery. It identifies scientific terms that MeSH hasn't indexed yet using Watchtower daily monitoring. Available for developers and enterprises. Learn more.

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EvidenX © 2026. All scores are structural descriptors, not clinical recommendations.