HAL Open Archive API

Overview

HAL (Hyper Articles en Ligne) is France's national open archive for scholarly deposits. Managed by CNRS, it hosts 4M+ full-text documents from French research institutions and international collaborators. The API provides Solr-based search with full metadata, PDF links, and OAI-PMH harvesting. Free, no authentication required.

API Endpoints

Search API

# Keyword search
curl "https://api.archives-ouvertes.fr/search/?q=machine+learning&rows=20&wt=json"

# Search specific fields
curl "https://api.archives-ouvertes.fr/search/?q=title_s:\"deep learning\"&wt=json"

# Filter by document type
curl "https://api.archives-ouvertes.fr/search/?q=neural+networks&\