MemWal (MystenLabs/MemWal) is an MCP server listed on the M8ven Trust Index. It scores 89 out of 100, grade B. It declares 8 tools. No publisher has claimed this listing.

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B
Emerging
89/100
7 days ago

MemWal

→ MystenLabs/MemWal· listed on github_code

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

MystenLabs

Source: github_code

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configMEMWAL_CLIENT_LABELFriendly delegate-key label shown in Walrus Memory.
configMEMWAL_CREDS_DIR
configMEMWAL_MCP_CALL_TIMEOUT_MS
configMEMWAL_MCP_CONNECT_TIMEOUT_MS
configMEMWAL_MCP_LOGIN_TIMEOUT_MS
configMEMWAL_MCP_SSE_IDLE_MS
configMEMWAL_NAMESPACEDefault memory namespace applied when the agent omits one.
configMEMWAL_SERVER_URLOverride the relayer base URL.
configMEMWAL_WEB_URLOverride the web app URL used during login.
// quality suggestions

Tool annotations

7/8 tools have annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

8/8 tools missing one or more hints — memwal_remember (missing: idempotentHint, openWorldHint); memwal_remember_bulk (missing: idempotentHint, openWorldHint); memwal_recall (missing: idempotentHint, openWorldHint), +5 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Domain consistency

npm scope @mysten-incubation doesn't match GitHub owner mystenlabs

Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/mystenlabs/memwal)](https://m8ven.ai/mcp/mystenlabs/memwal)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: 41c8f95484a6b4db8728dd74f9ead86733150dd7
code hash: a649827a4ed946044c42d61602e428bdc6da95ff6302cb7ecd8fb29364ff5a99
verified: 9/3/2026, 7:07:34 PM
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