Memory MCP Server (Go)

> A Model Context Protocol server that provides knowledge graph management capabilities. This server enables LLMs to create, read, update, and delete entities and relations in a persistent knowledge graph, helping AI assistants maintain memory across conversations. This is a Go implementation of the official TypeScript Memory MCP Server.

Features

High-Performance Storage: SQLite backend with WAL mode, read/write connection separation for concurrent access
Knowledge Graph Management: Persistent graph of entities, relationships, and observations
Advanced Search: FTS5 full-text search with BM25 ranking, synonym expansion, and time-decay scoring
Graph Traversal: Search results include 1-hop related entities for richer context
Entity Management: Merge duplicate entities, update types, modify observations, detect conflicts
Observation Metadata: Track source, confidence, and tags for each observation
MCP Resources & Prompts: AI clients can passively load graph summaries and use guided memory workflows
Flexible Transport: Supports stdio, SSE, and Streamable HTTP with optional Bearer or OAuth 2.1 authentication
Seamless Migration: Automatic upgrade from JSONL to SQLite with zero intervention
Cross-Platform: Pure Go SQLite (no CGO required), works on Linux, macOS, and Windows

Available Tools

Core CRUD

| Tool | Description |
|------|-------------|
| create_entities | Create new entities with name, type, and observations |
| create_relations | Create relations between entities (active voice) |
| add_observations | Add observations to existing entities |
| delete_entities | Delete entities and their associated relations |
| delete_relations | Delete specific relations |
| delete_observations | Delete specific observations from entities |

Query

| Tool | Description |
|------|-------------|
| search_nodes | Search entities by keyword with FTS5, synonym expansion, and graph traversal. Returns lightweight results with snippets and related entities |
| open_nodes | Get full details of specific entities by exact name |
| read_graph | Get graph overview (summary mode) or full export (full mode) |

Entity Management

| Tool | Description |
|------|-------------|
| merge_entities | Merge two entities: migrate observations and relations from source to target, then delete source |
| update_entities | Change an entity's type |
| update_observations | Replace an observation's content |
| detect_conflicts | Find potential duplicates and contradictions within an entity's observations |

MCP Resources

| URI | Description |
|-----|-------------|
| memory://graph/summary | Graph statistics and entity type distribution |
| memory://graph/recent | Recently accessed entities |
| memory://graph/types | All entity and relation type enumerations |
| memory://entities/{name} | Full details of a specific entity |

MCP Prompts

| Prompt | Description |
|--------|-------------|
| memory-recall | Recall relevant memories by topic |
| memory-save | Analyze conversation text and suggest what to save |
| memory-review | Generate a comprehensive review of an entity's memories |

Installation

Homebrew (macOS/Linux)

brew install okooo5km/tap/mms

Quick Install Script (macOS/Linux)

curl -fsSL https://raw.githubusercontent.com/okooo5km/memory-mcp-server-go/main/scripts/install.sh | bash

Options: -v v0.2.3 for a specific version, -d /usr/local/bin for a custom directory.

Pre-built Binaries

Download from GitHub Releases. Available for macOS (arm64/amd64), Linux (arm64/amd64), and Windows (arm64/amd64).

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