知己 (Zhiji) Memory — MCP Server

Chinese-first, brain-inspired long-term memory as an MCP server. Give any MCP client — Claude Desktop / Claude Code / Cursor / Cline / Cherry Studio / Coze — the ability to remember and understand your user across sessions.

中文用户：完整接入手册见 MCP-USAGE.md,或在线版 https://ai-know.me/mcp。

v0.4.0 · 9 tools / 2 resources / 1 prompt · stdio + Streamable HTTP · MCP protocol 2025-11-25

This repo is a thin bridge: it translates MCP tool calls into REST calls to the Zhiji backend (hosted at ai-know.me). The bridge stores nothing; all memory lives in the Zhiji service you connect to.

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Why not just another vector-memory MCP?

Mem0 / Zep / LangMem expose add / search / delete over a vector store. 知己 exposes brain-inspired primitives:

• 11-stage hybrid retrieval — trigram full-text + bge-large-zh semantic + time-decay + access-reinforcement + dedup ranking.
• 7-layer / 36-dimension evolving user profile — values, decision logic, behavior style, self-cognition, interoceptive & dynamic state.
• Workspace assembly — one call returns profile + relevant memories + confirmed facts + behavioral inferences, budget-trimmed for the client context window.
• Prospective reminders, multimodal ingest (audio / OCR / doc), and a self-evolving reward loop driven by user feedback.

All Chinese-optimized (trigram tokenizer + bge-large-zh); English is supported too. Memory is stored in the Zhiji backend you connect to — self-host it, or use the hosted ai-know.me service; either way it's your Zhiji instance, not a generic memory-SaaS middleman.

The 9 tools

Tool	What it does
zhiji_workspace_assemble	Flagship — one-shot "everything needed to understand this user" for a query
zhiji_memory_search	11-stage hybrid recall (FTS + semantic + time)
zhiji_memory_ingest	Write a conversation to long-term memory (fields must be author/text)
zhiji_ingest_file	Multimodal ingest — audio / image / PDF / Word / Excel / video → memory
zhiji_profile_get	7-layer / 36-dim user profile summary
zhiji_facts_get	Distilled atomic facts with confidence & conflict status
zhiji_prospective_due	Due/upcoming intentions (todos, promises, plans)
zhiji_feedback	Thumbs up/down → self-evolution reward + per-memory Q-value
zhiji_status	Health & memory scale (call first to verify connectivity)

Experimental capabilities (sleep consolidation / dream replay / emergence) are not exposed until their groundedness passes ablation.

Quick start

You need an agent Key (mb- prefix). Get one at https://ai-know.me/memory?tab=api (register + create a Key bound to your account).

Option A — remote, no install (recommended)

Point any Streamable-HTTP MCP client at the hosted endpoint — you don't need this repo at all:

claude mcp add zhiji-memory --transport http \
  --url https://ai-know.me/mcp \
  --header "Authorization: Bearer mb-yourKey"

Or in a URL-style client config (Cursor / Cherry Studio / LobeChat):

{
  "mcpServers": {
    "zhiji-memory": {
      "url": "https://ai-know.me/mcp",
      "headers": { "Authorization": "Bearer mb-yourKey" }
    }
  }
}

Option B — run this bridge locally (stdio)

Use this repo when you want the bridge as a local stdio process (e.g. a desktop client launches it for you), talking to the hosted Zhiji backend:

npm install   # only @modelcontextprotocol/sdk + zod

Then in your client config:

{
  "mcpServers": {
    "zhiji-memory": {
      "command": "node",
      "args": ["/absolute/path/to/zhiji-mcp/zhiji-mcp-server.mjs"],
      "env": {
        "MB_BASE_URL": "https://ai-know.me",
        "MB_API_KEY": "mb-yourKey"
      }
    }
  }
}

Verify

# visual debugger — should list 9 tools / 2 resources / 1 prompt
npx @modelcontextprotocol/inspector node zhiji-mcp-server.mjs

Full client matrix (LangChain, OpenAI Agents SDK, Coze…) is in MCP-USAGE.md.

Architecture — a stateless thin bridge

MCP client  ──stdio / HTTP(JSON-RPC)──►  zhiji-mcp-*.mjs  ──REST──►  Zhiji backend (ai-know.me)

The MCP layer stores nothing; it translates MCP tool calls into REST calls to the Zhiji backend. Shared core zhiji-mcp-core.mjs backs both entry points:

File	Role
zhiji-mcp-core.mjs	Tool/resource/prompt definitions (single source of truth)
zhiji-mcp-server.mjs	stdio entry (npm start)
zhiji-mcp-http.mjs	Streamable HTTP entry (npm run http)

Isolation & auth

• All data is hard-isolated by userEmail. The bridge treats userEmail as a namespace, not a credential.
• The hosted public endpoint requires an agent Key — requests without Bearer mb-… get 401; the backend binds each Key to its userEmail and rejects cross-user access.
• Never hand a key-less, userEmail-swappable bridge to end users — front it with your own backend that injects the correct userEmail. See MCP-USAGE.md §8.

Environment

Var	Default	Notes
MB_BASE_URL	http://localhost:3001	Zhiji backend address; for the hosted service use https://ai-know.me
MB_USER_EMAIL	—	default user namespace (single-user local use)
MB_API_KEY	—	mb- agent Key; forwarded as Bearer
MB_TIMEOUT_MS	60000	slow workspace routes can take ~15s

Status

Version	Highlights
v0.4	zhiji_ingest_file (9 tools) + public-release hardening (TLS, MCP_REQUIRE_KEY, JWT-only key issuance, cross-user isolation hard-test)
v0.5 (planned)	inference-list tool, resource subscriptions, fine-grained key permissions

Docs

• MCP-USAGE.md — full guide (install, all clients, per-tool reference, troubleshooting, FAQ)
• demo-guide.md — demo video recording guide
• Online: https://ai-know.me/mcp

License

MIT © 2026 知己 AI (ai-know.me)

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知己 AI · MCP integration — Chinese-first brain-inspired memory. The bridge is open; the memory intelligence lives in the Zhiji backend.