Source settings

Configure scholarly sources

Use environment variables to enable sources, set API keys, or override base URLs without exposing secrets in the browser.

How to edit sources

# .env.local
SEMANTIC_SCHOLAR_API_KEY=your_key
CORE_API_KEY=your_key
UNPAYWALL_EMAIL=you@example.com

# Optional source switches
CORE_ENABLED=true
SEMANTIC_SCHOLAR_ENABLED=true

# Optional base URL overrides
OPENALEX_BASE_URL=https://api.openalex.org

OpenAlex

Enabled

Source ID: openalex
Base URL: https://api.openalex.org
Base URL env: OPENALEX_BASE_URL
Enabled env: OPENALEX_ENABLED
API key: Not required

Crossref

Enabled

Source ID: crossref
Base URL: https://api.crossref.org
Base URL env: CROSSREF_BASE_URL
Enabled env: CROSSREF_ENABLED
API key: Not required

Semantic Scholar

Enabled

Source ID: semantic-scholar
Base URL: https://api.semanticscholar.org
Base URL env: SEMANTIC_SCHOLAR_BASE_URL
Enabled env: SEMANTIC_SCHOLAR_ENABLED
API key: SEMANTIC_SCHOLAR_API_KEY · not set

arXiv

Enabled

Source ID: arxiv
Base URL: https://export.arxiv.org/api
Base URL env: ARXIV_BASE_URL
Enabled env: ARXIV_ENABLED
API key: Not required

PubMed

Enabled

Source ID: pubmed
Base URL: https://eutils.ncbi.nlm.nih.gov/entrez/eutils
Base URL env: PUBMED_BASE_URL
Enabled env: PUBMED_ENABLED
API key: PUBMED_API_KEY · not set

DOAJ

Enabled

Source ID: doaj
Base URL: https://doaj.org/api
Base URL env: DOAJ_BASE_URL
Enabled env: DOAJ_ENABLED
API key: Not required

Europe PMC

Enabled

Source ID: europepmc
Base URL: https://www.ebi.ac.uk/europepmc/webservices/rest
Base URL env: EUROPEPMC_BASE_URL
Enabled env: EUROPEPMC_ENABLED
API key: Not required

CORE

Disabled

Source ID: core
Base URL: https://api.core.ac.uk/v3/search/works
Base URL env: CORE_BASE_URL
Enabled env: CORE_ENABLED
API key: CORE_API_KEY · not set