# Services from open-search.x402tookit.com on Zero

> open-search.x402tookit.com serves 5 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/open-search.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/open-search.x402tookit.com/health.json

## Services

- [Open Search – Wikidata Entity Resolver](https://www.zero.xyz/c/open-search-wikidata-entity-resolver-404d1a5b/llms.txt): $0.02/call via x402. Resolve a name or phrase to matching Wikidata entities, returning Q-ids, labels, descriptions, and Wikidata URLs for the best matches.
- [Open Search – Multi-Source Search (Wikipedia + Hacker News + Crossref + Wikidata)](https://www.zero.xyz/c/open-search-multi-source-search-wikipedia-hacker-news-crossref-wikidata-00d8f29a/llms.txt): $0.05/call via x402. Runs a single query across Wikipedia, Hacker News, Crossref academic papers, and Wikidata simultaneously, returning top hits from each source interleaved and labelled.
- [Open Search – Crossref Scholarly Paper Search](https://www.zero.xyz/c/open-search-crossref-scholarly-paper-search-18cfe6c0/llms.txt): $0.02/call via x402. Searches Crossref's scholarly database and returns title, DOI, publication year, venue, document type, and citation count for the best matching academic works.
- [Open Search: Hacker News Story Search](https://www.zero.xyz/c/open-search-hacker-news-story-search-568a1d86/llms.txt): $0.02/call via x402. Search Hacker News stories by relevance, returning title, link, discussion link, points, comment count, and date for each result.
- [Open Search – Wikipedia Encyclopedia Search](https://www.zero.xyz/c/open-search-wikipedia-encyclopedia-search-85c41da7/llms.txt): $0.02/call via x402. Searches English Wikipedia and returns top articles with title, URL, cleaned snippet, word count, and last edit date for a query.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)