It provides a way for supported coding tools to communicate with that memory service without requiring a separate desktop application. The input does not explain what kinds of memories the service stores.

memwal — MCP server by MystenLabs

memwal

memwal is an MCP server for Claude Code from MystenLabs/MemWal. Its token cost is not measured, scanned A, original, Apache-2.0.

A local bridge that connects coding tools such as Cursor and Claude Code to the Walrus Memory service. It runs as a small command-line server and uses a browser-based wallet sign-in the first time.

In plain words

What is it for?: Use it to configure the Walrus Memory connection through the provided npm package and run it locally over the tool's standard input and output.
Why use it?: It provides a way for supported coding tools to communicate with that memory service without requiring a separate desktop application. The input does not explain what kinds of memories the service stores.

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: listed in a Claude config.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the memwal plugin — 3 hooks, 1 MCP server shipped together

Good fit Use it to configure the Walrus Memory connection through the provided npm package and run it locally over the tool's standard input and output.

Compare 6 mcp servers from other repositories ↓

Installing this writes the configuration, not the program: `node` runs a file from the repository, so clone it first and make the path in the command match where you put it.

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add MystenLabs/MemWal

Claude Code

/plugin install memwal

Installing this writes the configuration, not the program: `node` runs a file from the repository, so clone it first and make the path in the command match where you put it.

Made for: Claude Code.

Or install memwal, the plugin that ships this one along with the rest of its 3 hooks, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/mystenlabs/memwal/plugin-memwal/github.svg)](https://agentmods.dev/mcp/mystenlabs/memwal/plugin-memwal)

Your own site

<a href="https://agentmods.dev/mcp/mystenlabs/memwal/plugin-memwal"><img src="https://agentmods.dev/badge/mcp/mystenlabs/memwal/plugin-memwal/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/mystenlabs/memwal/plugin-memwal"><img src="https://agentmods.dev/badge/mcp/mystenlabs/memwal/plugin-memwal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

memwal scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/mcp/plugin/.mcp.json · 8 lines

What it actually says

{
  "memwal": {
    "command": "node",
    "args": [
      "${CLAUDE_PLUGIN_ROOT}/scripts/launch_mcp.mjs"
    ]
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed · -1 lines 78b576f4b86a
1mo ago Changed 8e58e8ef4622
1mo ago Changed 1fee5ab2a3d5
2mo ago First seen · 9 lines scan A 6a22dc9a8e7a

Subscribe to this mod's changes

memwal is an MCP server published in the GitHub repository MystenLabs/MemWal (121 stars, last pushed 18d ago), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Memory and context

memwal next to 6 mcp servers from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
memwalMystenLabs/MemWal	MCP server	121	18d ago	Apache-2.0	A	—	Claude Code
hypermnesia-mcpcdeust/Cortex	MCP server	76	today	MIT	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
data-olympusknaisoma/data-olympus	MCP server	30	2d ago	Apache-2.0	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
neverinfamous-memory-journal-mcpneverinfamous/memory-journal-mcp	MCP server	20	4d ago	MIT	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
fidelis-memoryhermes-labs-ai/fidelis	MCP server	25	18d ago	Apache-2.0	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
rag-ratcq27-dev/rag-rat	MCP server	26	28d ago	MIT	A	—	Claude Code
cgr-captureGNS-Foundation/grafomem	MCP server	3	yesterday	MIT	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode