# science-database.com — Full Index

> The Knowledge Interface — Bridging Research and Understanding
> Last updated: 2026-04-11

## About
science-database.com is a knowledge interface that transforms raw scientific research
into structured, evidence-rated, machine-readable content. Every article exists in
three formats: web page (HTML), API (JSON-LD), and Markdown with YAML frontmatter.

Our evidence grading system rates content from A (strong, replicated evidence)
to D (preliminary, preprint-level). All metadata — discipline, study type,
peer-review status, replication status — is available via API and in Markdown files.

## How to Use This Data
- Individual articles: https://science-database.com/md/{slug}.md
- Bulk downloads: https://science-database.com/md/bulk/{topic}.zip
- REST API: https://science-database.com/api/v1/articles
- GraphQL: https://science-database.com/api/graphql
- Technology hubs have their own llms.txt: https://science-database.com/technology/{name}/llms.txt

## Data Sources
We aggregate from 10+ open scientific APIs:
PubMed (40M+ articles), arXiv (2.4M+ preprints), OpenAlex (270M+ works),
Semantic Scholar (200M+ papers), Crossref (150M+ DOIs), CORE (300M+ records),
Europe PMC, NASA ADS, DOAJ, and RSS feeds from Nature/Science.

## Articles
(Articles will be listed here as the database grows)

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For the compact version, see: https://science-database.com/llms.txt
For API documentation: https://science-database.com/developers