claude-mailbox (zach-source/claude-mailbox) is an MCP server listed on the M8ven Trust Index. It scores 67 out of 100, grade C. It declares 17 tools. No publisher has claimed this listing.

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C
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67/100
1 month ago

claude-mailbox

An MCP server that enables concurrently-running Claude Code sessions to cross-talk via channels, DMs, and leader coordination, all backed by a shared beads database.

→ zach-source/claude-mailbox· listed on glama

Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

Limited view: static analysis for Python is partially covered.

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Who stands behind it

zach-source

Source: Glama

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// 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.
configMAILBOX_GLOBALclient. This mode is meant to be paired with =0 so the pod gets
configMAILBOX_TRANSPORThttp to instead run it as a standalone network service, for
configMAILBOX_HTTP_HOST127.0.0.1 Bind host when MAILBOX_TRANSPORT=http
configMAILBOX_HTTP_PORT8000 Bind port when MAILBOX_TRANSPORT=http
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

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

All four hints declared on every tool

17/17 tools missing one or more hints — register_session (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); heartbeat (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); update_objective (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +14 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.

Tool inputs are validated

13/17 tool handlers declare input schemas (76%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 3/17 tool handlers wrap calls in try/catch (18%)

Wrap each tool handler body in try/catch and return a structured error response.

License file

No license file

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

Tests exist

No test files found

Add tests that exercise each declared tool.

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 6 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/zach-source/claude-mailbox)](https://m8ven.ai/mcp/zach-source/claude-mailbox)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: dbeea314325c8711c7294a5fa955921ec5ba45b6
code hash: 913ef8f28eb7e0578236ebb22d3ac9dc5b3cce11064aa10e92ff6e9086a2e5d5
verified: 7/25/2026, 8:35:08 AM
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