Skip to content
v0.1 — early development

Book Context Protocol

Licensed, citable retrieval for books, papers, and deep reference material — built for AI. Bring your owned or institution-licensed sources into your AI workflows with clean citations, clear usage rules, and an upgrade path to paying rights holders.

The problem

AI workflows break down where the best information lives. Books and paid PDFs are hard to search well. Citations are messy across editions and formats. Rights are unclear. Teams rebuild the same pipelines in a dozen incompatible ways.

What is BCP

A content and retrieval standard for long-form sources. BCP defines how books, papers, and manuals are described, accessed, cited, and metered — so any tool can retrieve the right passages without treating content like a free-for-all.

Manifests

What the work is, which edition, how it's structured. Stable work and edition identifiers.

Locators

Stable references to passages — not fragile page numbers. Section, paragraph, and text hash.

Policies

What's allowed: quote length, display rules, caching limits. Rights travel with the content.

Receipts

Optional usage metering so creators and publishers can get paid. Micropayments, subscriptions, or one-time access.

Interface

Four standard tools — delivered over MCP or any transport.

search

query, filters → passage handles

fetch

handle, max_chars → text + citation + receipt

cite

handle, style → formatted citation

policy

work_id → allowed uses + pricing

Examples

request

search("how repetition creates false beliefs", { author: "Kahneman" })

response

“A reliable way to make people believe in falsehoods is frequent repetition, because familiarity is not easily distinguished from truth.”

isbn:9780374533557/pt. 1, ch. 5/7b2f4a
policy

verbatim allowed / max 500 chars

receipt

384 chars / $0.0029

Who this is for

Builders

Plug books and papers into agents and RAG with clean, stable citations. Less glue code, fewer one-off pipelines, better results.

Research & quant teams

Build internal knowledge systems over finance, science, and engineering references — with provenance and audit trails.

Publishers & authors

New revenue channel into AI retrieval. Policy controls, usage receipts, and a real path to getting paid for your work.

Institutions

Bring-your-own-access with existing subscriptions. Compliance, audit logs, and org-level controls.

Roadmap

v0.1 — now
  • Work manifest schema
  • Passage locators + citation format
  • Basic policy schema
  • Reference provider + client
v0.2 — next
  • Usage receipts + payout reporting
  • Versioning and change tracking
  • No-verbatim / pointer-only mode
v0.3 — later
  • Hosted marketplace + discovery
  • Publisher onboarding + payouts
  • Institutional access integration

BCP is forming now

We're building the spec in the open. Drop your email and we'll keep you posted as things take shape.