SERVICE CARD / second-brain-cloudflare

Second Brain

A personal knowledge base and MCP server in its keyword-search fallback profile

What is this project

A self-hosted personal knowledge base with an MCP server

What problem does it solve

Notes and knowledge are scattered across tools and AI lacks a controlled interface to search them

Who it is for

  • Consultants, researchers and creators
  • Small teams that need durable working knowledge

What it can do

  • Store notes and knowledge relationships
  • Provide keyword search and MCP access
  • Manage data and authorization in your own D1 and KV

Deployment requirements

  • A Cloudflare Worker, D1 and KV
  • The deployer configures MCP authorization and backups

Known limitations

  • The catalogue profile is keyword-search based, not vector search
  • The deployer owns retention and backup responsibilities
Discovered3 EVIDENCESPEC 0.3.12026-08-03
Public evidence, scoped to this version and date.
Second Brain verified service screenshot
Screenshot referenced by the published Evidence Pack
Second Brain 架構與資料流（依部署契約機械生成）使用者WorkerD1 資料庫KV 儲存Workers AICron 排程
Architecture generated from the Service Card data flow.

Give this to your Agent

Please follow https://github.com/smallgreen-cloud/adapter-second-brain/AGENTS.md to deploy this service

Ownership and data

Upstream
rahilp/second-brain-cloudflare
License
MIT
Profile
small-app
External services
None
Data flow
Notes and the knowledge graph are stored in D1 while MCP authorization state is stored in KV and semantic search falls back to keywords

Evidence Packs

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