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free-books-indexes
x402
free-books-indexes is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Browse and download free public-domain books on the subject of 'Indexes' from Project Gutenberg and Internet Archive, ranked by relevance and popularity
Price / call$0.01
Success—
StatusUnknown
How this service works
Free public-domain books on "Indexes": browse the catalogue's works tagged with that Library of Congress subject (230 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.
Output
A paginated list (20 items per page) of public-domain books tagged with the 'Indexes' Library of Congress subject, sourced from Project Gutenberg and Internet Archive, including book titles, author names, relevance and popularity rankings, and direct download links in epub, txt, and html formats. Results are re-verified daily.
Example use cases
Researcher finding indexing technique books
“I'm researching historical indexing methods — can you pull up a page of free public-domain books on the subject of indexes and show me the most popular ones with download links?”
Librarian browsing subject catalogue
“I want to browse free classic books tagged with the Library of Congress 'Indexes' subject — show me the first page of results ranked by relevance with epub and txt links.”
Author searching by specific indexer
“Can you search the free public-domain books on indexes and filter by the author Hans Wellisch? I want to see what's available to download for free.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/library/subject/indexesWhen to prefer
Choose this endpoint when you need a curated, daily-verified, paginated catalogue of free public-domain books specifically on the 'Indexes' Library of Congress subject, with ready-to-use download links across multiple formats. Prefer this over general web search when you need structured bibliographic results with direct epub/txt/html links rather than raw search results.
Side effects
- No results returned if keyword filters are too narrow or misspelled
- Payment failure if USDC micropayment is not authorized (x402 protocol)
- Stale or broken download links if a source removes a title between daily re-verification cycles
- Empty page if requested page number exceeds total available results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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