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free-books-mars-planet
x402
free-books-mars-planet 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 tagged with the Library of Congress subject 'Mars (Planet)' 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 "Mars (Planet)": browse the catalogue's works tagged with that Library of Congress subject (185 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 Library of Congress subject 'Mars (Planet)', including title, author, relevance/popularity ranking, and direct download links in epub, txt, and/or html formats. Data is re-verified daily and draws from Project Gutenberg (185+ titles) and Internet Archive scans.
Example use cases
Classic Mars sci-fi reading list
“Show me the most popular free public-domain science fiction books about Mars I can download — I want epub or txt links so I can load them onto my e-reader.”
Research Mars literature catalogue
“I'm putting together a bibliography of historical books about Mars the planet — can you fetch a catalogue of public-domain works tagged with that subject, ranked by relevance?”
Find specific Mars author's free works
“Can you search the free public-domain book catalogue for Mars Planet titles by H.G. Wells and give me direct download links for anything that comes up?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/library/subject/mars-planetWhen to prefer
Choose this endpoint when you need a curated, daily-verified catalogue of free public-domain books specifically about Mars the planet, with direct download links across multiple formats. It is ideal over general web search when you want structured bibliographic data with epub/txt/html links ready to use, filtered by the authoritative Library of Congress subject heading rather than keyword guessing.
Side effects
- No results returned if query keywords don't match any titles or authors in the catalogue
- Pagination out of range returns empty result set
- Occasional stale links if a source removes content between daily re-verification cycles
- Rate or payment failure if USDC payment for the $0.01 per call is not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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