{"name":"Book402","description":"AI-native book knowledge API. 3,807 books searchable via hybrid BM25+vector search. Pay per query with USDC on Base via x402 protocol. No API keys, no subscriptions.","url":"https://book402.com","provider":{"organization":"Feralbyte","url":"https://feralbyte.com"},"version":"1.0.0","capabilities":{"streaming":false,"pushNotifications":false},"authentication":{"schemes":["x402"],"description":"Payment via x402 protocol — HTTP 402 with USDC on Base (Chain ID 8453). Free discovery endpoints available."},"skills":[{"id":"hybrid-search","name":"Hybrid Book Search","description":"Search 3,807 books using BM25 + vector similarity. Returns ranked results with titles, authors, genres, and relevance scores.","tags":["search","books","knowledge","BM25","vector"],"examples":["Search for books about stoicism","Find books on machine learning","Books about habits and productivity"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"book-summary","name":"Book Summary","description":"Get the full AI-generated summary/transcription of a specific book by ID.","tags":["summary","books","knowledge"],"examples":["Get summary of book 42","Read the transcription of Atomic Habits"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"summary-search","name":"Full-Text Summary Search","description":"Search within book summaries/transcriptions for specific concepts or passages.","tags":["search","summaries","full-text"],"examples":["Search summaries for compound interest","Find passages about neural networks"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"genre-browse","name":"Genre Browser","description":"List all available book genres with counts. Free endpoint.","tags":["browse","genres","discovery"],"inputModes":["application/json"],"outputModes":["application/json"]}],"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"]}