freesearch-searchlisted

# 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 - The user has no `SEARCHAPI_API_KEY` / `GEMINI_API_KEY` / Undermind login — this is the keyless search backbone, OR - You want extra grounded, clean-metadata coverage from the scholarly indexes alongside the other channels. Run it in parallel with whatever else is available; its output merges at dedup. ## Recipe Use the same Stage-0 query list Google Scholar uses: ```bash python freesearch-search/scripts/freesearch_search.py \ --queries-file OUT/scholar_queries.json -o OUT/stage4e_freesearch.json ``` Or a single query with `--query "..."`. Options: `--per-query N` (default 20) and `--sources openalex,crossref,semanticscholar` (any subset). It writes `stage4e_freesearch.json` (+ `.ris`) with `source` set per index, deduped across indexes by DOI then title. The `stage[0-9]*.json` dedup glob picks it up automatically. ## Keys None required. OpenAlex and Crossref use the polite pool via a mailto