MCP 服务器

Engram

Persistent memory for AI agents. Stores verbatim conversation transcripts and makes them searchable by meaning via semantic embeddings.

README

Engram

Memory infrastructure for AI agents. Store every conversation verbatim. Search by meaning.

Engram is an MCP-native memory server that stores complete, uncompressed conversation transcripts and makes them searchable via semantic search. Connect any MCP-compatible client — Claude Desktop, Claude Code, Cursor, Windsurf, Zed — and your agent remembers everything across sessions.

Quick start

Sign up at getengram.app and get your API key
Add to your MCP config (Claude Desktop, Claude Code, Cursor, etc.):

{
  "mcpServers": {
    "engram": {
      "command": "npx",
      "args": ["-y", "@getengram/cli@latest", "mcp"],
      "env": {
        "ENGRAM_API_KEY": "engram_sk_live_..."
      }
    }
  }
}

Start using it. Your agent now has persistent memory.

How it works

Verbatim storage — every message stored exactly as sent, no summarization or compression
Semantic search — find relevant context by meaning using bge-base-en-v1.5 embeddings
MCP-native — speaks the Model Context Protocol natively, works with any compatible client
Multi-tenant — per-organization isolation, team seats, and API key management

Architecture

Runs entirely on Cloudflare's developer platform:

Workers — Hono.js API and MCP server
D1 — SQLite at the edge for messages and metadata
Vectorize — semantic search index
Workers AI — embedding generation

Read the full architecture deep-dive.

MCP tools

Engram exposes 6 tools via MCP:

Tool	Description
`create_conversation`	Start a new conversation with optional title, tags, metadata
`append_messages`	Add messages to an existing conversation
`search`	Semantic search across all conversations
`get_conversation`	Retrieve a conversation with its messages
`list_conversations`	List conversations with filtering and pagination
`delete_conversation`	Remove a conversation and its data

See the API reference for full parameters and examples.

Packages

Package	Description
`apps/mcp-server`	Cloudflare Worker — MCP server and REST API
`apps/cli`	CLI and MCP bridge (`@getengram/cli`)
`packages/sdk`	TypeScript SDK (`@getengram/sdk`)
`packages/db`	Database queries and migrations
`packages/shared`	Shared constants, types, and utilities