A local-first AI librarian
with cryptographic provenance.
Watcher on the Wall turns your work into a maintained, queryable, source-backed wiki — with every fact traceable to where it came from.
Every fact, traceable.
SHA-256 chain hashes every source, every operation, every change. Your wiki isn't just searchable — it's auditable. Any tampering invalidates the tail of the chain.
Built to run, not run scripts.
Background ingestion, automatic compilation, BM25 retrieval with a zero-hit grounding guard. Production-grade daemon that watches your sources and keeps your wiki current — tested end-to-end, published as a versioned npm package.
MCP-native from day one.
Native Model Context Protocol support means Claude Code, Claude Desktop, and any MCP-compatible agent can query and contribute to your wiki — without bespoke integration work.
Simple pricing.
Free for individual use, self-hosted. $20/mo founding rate for hosted — locked for life within the 30-day window from launch.
See full pricing