Conceptio: open-access search for papers, standards and case law
Conceptio is an open-access document retrieval layer for AI agents and researchers: books, papers, standards and case law, every source open access or public domain, with license, provenance and citation metadata on every hit.
Live index: 1,334,297 documents, 118,809 model cards, last synced 2026-10-19 (/api/health).
The interactive app needs JavaScript; these surfaces do not:
- Docs and docs.md: the full documentation, docs.md as raw markdown for agents
- llms.txt: the agent entry point for this site
- OpenAPI and MCP manifest: the machine contract
- /api/health: document and model counts, last sync
- Sources and Models: what the index holds
- Pricing: Free EUR 0, Pro EUR 9.99/month, Dev EUR 19.99/month (Dev is the plan whose key opens the REST API, MCP and CLI)
- CLI:
pip install conceptio-search, then conceptio auth (source)