memory-mcp-go

A lightweight MCP server in Go that provides shared memory between AI agents. Designed to work standalone or behind agent-mesh as a governed backend.

Features

4 tools: memory_store, memory_recall, memory_list, memory_forget
Shared state: any agent can store and recall memories via MCP
Tag-based filtering: organize memories with tags, filter with AND logic
Agent tracking: each memory records which agent stored it
TTL support: optional time-to-live with automatic expiration
Upsert: storing with an existing key updates the entry
JSON persistence: memories saved to a local JSON file
MCP stdio transport: NDJSON over stdin/stdout, compatible with any MCP client

Quick start

go build -o memory-mcp-go .
./memory-mcp-go

Configuration

| Environment variable | Default | Description | |---------------------|---------|-------------| | MEMORY_DIR | ~/.memory-mcp | Directory for the memories.json file | | MEMORY_MAX_ENTRIES | 10000 | Maximum number of stored memories |

Usage with agent-mesh

In your config.yaml:

servers:
  memory:
    transport: stdio
    command: /path/to/memory-mcp-go
    env:
      MEMORY_DIR: /tmp/shared-memory

Tools

memory_store

Store or update a memory entry (upsert by key).

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | key | string | yes | Unique key for this memory | | value | string | yes | The content to remember | | tags | string[] | no | Tags for filtering and grouping | | agent | string | no | Identifier of the storing agent | | ttl | number | no | Time-to-live in seconds (0 = permanent) |

memory_recall

Recall memories by key, tags, or agent.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | key | string | no | Exact key to recall | | tags | string[] | no | Filter by tags (AND logic) | | agent | string | no | Filter by agent identifier | | limit | number | no | Max results (default 10) |

memory_list

List memory keys with metadata (without values).

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | tags | string[] | no | Filter by tags | | agent | string | no | Filter by agent |

memory_forget

Delete memories by key or tags.

| Parameter | Type | Required | Description | |-----------|------|----------|-------------| | key | string | no | Exact key to delete | | tags | string[] | no | Delete all matching entries |

Multi-agent example

Agent A (Claude)  ──store──►  memory-mcp-go  ◄──recall──  Agent B (Ollama)
                                    │
                              memories.json

Multiple agents sharing context through a common memory store, governed by agent-mesh policies.

License

MIT

MCP Servers