MenteDB MCP Server

Beta — MenteDB is under active development. APIs may change between minor versions.

The MCP (Model Context Protocol) server for MenteDB, the mind database for AI agents.

What is this?

This MCP server lets any AI agent (Claude, GPT, Copilot, or any MCP compatible client) use MenteDB as persistent memory. It connects to MenteDB Cloud by default — no local database, no file locks, works across multiple sessions simultaneously.

Quick Start

Install and configure in one command:

npx mentedb-mcp@latest setup copilot

Then authenticate:

npx mentedb-mcp@latest login

That's it. Your agent now has persistent memory that works across all your sessions and devices. Replace copilot with cursor or claude for other editors.

How it works

Once logged in, the MCP server runs as a thin HTTP client — all memory operations (store, search, recall) are handled by MenteDB Cloud. This means:

• No local database locks
• Multiple editor sessions can run simultaneously
• Memories sync across devices automatically
• Embeddings and extraction are handled server-side (no local GPU needed)

Local mode (offline/self-hosted)

If you prefer to run entirely offline without cloud:

mentedb-mcp --local

In local mode, the server uses an embedded database at ~/.mentedb/. Only one instance can run at a time due to file locking.

Alternative: install from source

If you prefer building from source instead of npx:

cargo install mentedb-mcp
mentedb-mcp setup copilot
mentedb-mcp login

Updating

After upgrading, instructions auto-update on server startup. To manually review and confirm changes:

mentedb-mcp update copilot

The update command shows you the exact instructions that will be written and asks for confirmation. If you've customized the MenteDB block, it warns you and creates a .bak backup. Your own instructions outside the MenteDB block are always preserved.

CLI Commands

Command	Description
setup <client>	Auto-configure MCP for copilot, cursor, or claude
update <client>	Update agent instructions (preserves customizations)
login	Authenticate with MenteDB Cloud via browser
logout	Remove cloud credentials
status	Check cloud connection and token validity

Authentication

npx mentedb-mcp@latest login

This opens your browser to authorize the CLI. Once authenticated, credentials are saved to ~/.mentedb/cloud.json and the MCP server connects to MenteDB Cloud on subsequent runs.

To check your connection:

npx mentedb-mcp@latest status

To revoke access:

npx mentedb-mcp@latest logout

You can also revoke sessions from the web dashboard at app.mentedb.com.

Manual Configuration

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS), ~/.config/claude/claude_desktop_config.json (Linux), or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "mentedb": {
      "command": "npx",
      "args": ["-y", "mentedb-mcp@latest"]
    }
  }
}

Cursor

Add to your Cursor MCP configuration:

{
  "mcpServers": {
    "mentedb": {
      "command": "npx",
      "args": ["-y", "mentedb-mcp@latest"],
      "transportType": "stdio"
    }
  }
}

GitHub Copilot CLI

Add to ~/.copilot/mcp-config.json:

{
  "mcpServers": {
    "mentedb": {
      "command": "npx",
      "args": ["-y", "mentedb-mcp@latest"],
      "alwaysAllow": [
        "process_turn", "store_memory", "search_memories", "forget_memory"
      ]
    }
  }
}

The alwaysAllow list lets memory tools run without approval prompts.

Tools

By default, the server exposes 4 essential tools:

Tool	Description
process_turn	Call every turn. Stores conversation, retrieves context, detects contradictions, generates pain warnings. Triggers automatic enrichment when LLM is configured. Accepts project_context and agent_id for scoping.
store_memory	Store an important fact with type, tags, and optional scope.
search_memories	Semantic search by query, or get full content by memory UUID. Accepts limit (default 10, max 50) and memory_type filter.
forget_memory	Delete a memory by ID. Accepts optional reason for audit logging.

What process_turn returns

Field	Description
context	Top 10 semantically relevant memories + all always-scoped memories
stored	Number of facts auto-extracted and stored from this turn
contradictions	Number of contradictions detected
pain_warnings	Array of { signal_id, intensity, description } from anti_pattern memories matching current context (omitted when empty)
proactive_recalls	Memories surfaced by detected action keywords (omitted when empty)
detected_actions	Action keywords recognized in the turn (omitted when empty)

Automatic Enrichment

When an LLM provider is configured, process_turn automatically triggers a background enrichment pipeline that enhances your memory graph over time:

Phase	What it does
Extraction	Converts raw conversations into structured semantic facts and entity nodes
Entity Linking	Resolves duplicates and aliases (e.g., "JS" ↔ "JavaScript") using rules + LLM
Community Detection	Groups related entities and generates summaries per community
User Model	Builds an always-available user profile from accumulated knowledge

Enrichment is fully automatic — no additional tools or configuration needed beyond setting an LLM provider. Results feed directly into future process_turn context retrieval, improving recall quality over time.

Configure an LLM provider via environment variables:

# OpenAI (recommended)
export MENTEDB_OPENAI_API_KEY=sk-...

# Or Anthropic
export MENTEDB_ANTHROPIC_API_KEY=sk-ant-...

# Or Ollama (local, no key needed)
export MENTEDB_LLM_PROVIDER=ollama

Without an LLM provider, the MCP server works perfectly — enrichment simply doesn't run.

Memory Types

Type	Use for	Example
semantic	Facts, preferences, project details	"User prefers Rust over Go"
episodic	What happened in a specific interaction	"Debugged OOM in prod on Jan 5"
procedural	How to do things	"To release: bump version, tag, push"
correction	Something was wrong and is now right	"API key goes in .env, not config.toml"
anti_pattern	Things to never do	"Never force-push to main"
reasoning	Why a decision was made	"Chose DynamoDB over Postgres for scaling"

Memory Scope

Scope	Behavior
contextual (default)	Retrieved by semantic similarity when relevant to the conversation
always	Returned on every process_turn call regardless of topic. Use for critical rules.

Set scope: 'always' when the user says "always remember this" or states a hard constraint.

Memory Quality Guidelines

• One fact per memory — don't combine unrelated facts in a single memory
• Self-contained — "User prefers tabs over spaces in Python" not just "prefers tabs"
• Include context — "For mentedb-mcp, deploy with..." not just "deploy with..."
• Keep under 200 words — summarize if needed
• Don't store — greetings, temporary info, large code blocks, chitchat

Resilience

Even if process_turn fails or errors on a turn, always call it again on the next turn. Never skip because of a prior failure.

Local mode: full tools (--full-tools)

In local mode (--local), you can expose all 32 tools with --full-tools for advanced memory operations including knowledge graph traversal, consolidation, cognitive systems, and GDPR forget.

Configuration

CLI Arguments

mentedb-mcp [OPTIONS]

Options:
  --local                     Force local mode (embedded database, single instance)
  --data-dir <PATH>           Data directory path [default: ~/.mentedb]
  --embedding-dim <DIM>       Embedding vector dimension [default: 128]
  --llm-provider <PROVIDER>   LLM provider for local extraction: openai, anthropic, ollama, mock [default: mock]
  --llm-api-key <KEY>         API key for the LLM provider (overrides env var)
  --llm-model <MODEL>         Model name override for the LLM provider
  --full-tools                Expose all 32 tools (local mode only, default: 4 essential tools)
  -h, --help                  Print help

Environment Variables

Variable	Description
MENTEDB_API_URL	Override cloud API URL (default: https://api.mentedb.com)
MENTEDB_CLOUD_URL	Override cloud dashboard URL (for login flow)
MENTEDB_LLM_PROVIDER	LLM provider: openai, anthropic, ollama, mock
MENTEDB_LLM_API_KEY	API key for LLM extraction
MENTEDB_LLM_MODEL	Model name override
MENTEDB_OPENAI_API_KEY	OpenAI API key (sets provider to openai automatically)
MENTEDB_ANTHROPIC_API_KEY	Anthropic API key (sets provider to anthropic automatically)

The server writes logs to both stderr and a rolling file at ~/.mentedb/mentedb-mcp.log.

Architecture

Cloud mode (default): The server runs as a lightweight HTTP proxy on stdio transport. All memory operations are forwarded to MenteDB Cloud which handles embedding generation (via AWS Bedrock Titan), semantic search, LLM extraction (via Claude), and DynamoDB storage. No local state is kept.

Local mode (--local): The server uses the full MenteDB engine with an embedded fjall database, local Candle embeddings (all-MiniLM-L6-v2), and optional LLM extraction. This mode supports all 32 tools including knowledge graph, consolidation, and cognitive systems.

Issues

Found a bug or have a feature request? Open an issue.

License

Apache-2.0