{"uid":"cap_atDP1TpRmfEhQyYxjjxOa","slug":"free-books-birds-981bfc57","name":"free-books-birds","description":"Free public-domain books on \"Birds\": browse the catalogue's works tagged with that Library of Congress subject (406 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. $0.01 per page of 20.","url":"https://intel.rallylive.ca/library/subject/birds","method":"GET","headers":{},"bodySchema":{"type":"object","$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_KmPSuFpQ7Bm2mOev_bgQi","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":"Returns a paginated catalogue of free public-domain books about birds from Project Gutenberg and Internet Archive, ranked by relevance and popularity, with download links.","exampleAgentPrompt":"Can you pull up a list of free public-domain books about birds I can download — maybe filter by Audubon or naturalist authors if possible?","exampleUseCases":[{"title":"Researcher finding classic ornithology texts","prompt":"I'm researching 19th-century bird science — can you find me free downloadable books about birds from that era, ideally with epub links?"},{"title":"Teacher building a reading list on birds","prompt":"I need a list of free public-domain books about birds I can share with students, with download links they can use right away."},{"title":"Birdwatcher looking for field guide classics","prompt":"Can you browse the free bird books catalogue and find anything about British songbirds or migratory species I could read as an ebook?"}],"resultDescription":"A ranked page of up to 20 book records matching the 'birds' subject tag, each including title, author, relevance/popularity score, and direct download links in epub, txt, and/or html formats. Results are re-verified daily and sourced from Project Gutenberg and Internet Archive.","failureModes":["No results returned if query keywords match no titles or authors in the catalogue","Payment failure if USDC balance is insufficient for the $0.01 per call fee","Rate limiting or HTTP 402 if payment header is missing or malformed","Empty catalogue page if page number exceeds available results"],"whenToPreferThis":"Use this endpoint when you need a curated, daily-verified catalogue of free, public-domain books specifically tagged under the Library of Congress 'Birds' subject heading, with ready-to-use download links. Prefer it over general web search when you need structured ebook metadata (formats, authors, rankings) rather than raw search results, and when cost-per-lookup (as low as $0.01) matters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:55.729Z","isFirstParty":false}