Book402 — AI-Native Book Knowledge API
API enables hybrid BM25+vector search across 3,807 books with full-text summary queries and relevance ranking.
Trust signal
4 of 4 pillars
coverage 100%
Pillars
Signals
Evidence tiers, not an endorsement · trust model v0.1.0 (provisional) · CDP-lane settlement only (D3) · Trust API coming soon
On-chain traction
ERC-8004 agent registry
Not found in the ERC-8004 agent registry. This is the default state — absence is not a negative signal.
Identity & classification
Settlement volume
USDC settled on-chain · monthly
as of Jul 12, 2026
Endpoints(2)
Hybrid BM25+vector search across 3,807 books. Returns ranked results with titles, authors, genres, and relevance scores. Query param: q (string, required) - search query, limit (number, optional, default 20). Example: GET /search/hybrid?q=stoicism. Returns JSON array of matching books.
Full-text search within book summaries and transcriptions for specific concepts or passages. Query param: q (string, required), limit (number, optional, default 20). Example: GET /search/summaries?q=compound+interest. Returns JSON with matching excerpts.