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README
Free Index Search channel (Stage 4e) — keyless OpenAlex / Crossref / Semantic Scholar
A zero-key discovery channel: it runs the Stage-0 query list against the free, keyless keyword-search endpoints of OpenAlex, Crossref, and Semantic Scholar and normalizes the real records into the pipeline schema. Together with the agent web-search channel (Stage 4d) it is the "only Claude Code" search fallback — no search account or API key required.
Unlike web search, this is a plain subprocess (it calls keyless HTTP APIs), so it runs the same way in any context.
When to use
This is the opening of the README. Read the full README on GitHub.