{"uid":"cap_nDBJIFJpfjgpPtfN61u1j","slug":"free-books-mars-planet-74313e5a","name":"free-books-mars-planet","description":"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. $0.01 per page of 20.","url":"https://intel.rallylive.ca/library/subject/mars-planet","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ik2VsXWm7eCdYW623ol8X","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Can you pull up a list of free public-domain books about Mars the planet — I want to browse what's available with download links, maybe filtered to Edgar Rice Burroughs if possible?","exampleUseCases":[{"title":"Classic Mars sci-fi reading list","prompt":"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."},{"title":"Research Mars literature catalogue","prompt":"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?"},{"title":"Find specific Mars author's free works","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:55.317Z","isFirstParty":false}