codecalc (The-40-Thieves/codecalc) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 52 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100

codecalc

An MCP server that lets AI models run code in 31 languages, evaluate symbolic math and logic problems, and measure complexity—exposed as 48 tools for execution, session management, translation, optimization, and more.

→ The-40-Thieves/codecalc· listed on glama

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.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

The-40-Thieves

Source: Glama

Is this your MCP?

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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.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: FAKE_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// 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.
configCODECALC_WHEEL_TAG
configCODECALC_PROTO_PATH
configCODECALC_WIN_APPCONTAINERwith =1) and fails closed — if profile creation,
configCODECALC_EXEC_BINOverride the sandbox binary. Without one, codecalc falls back to a pure-Python executor — list_languages and execute_code still work, but the Rust path is the production one.
configCODECALC_SESSION_ROOTWhere session workspaces live. Keep this codecalc-private. codecalc cleanup --write --include-unmarked removes plain, session-shaped subdirectories under it on a heuristic (name shape + age) that is a loose filter, not a strong one — never point it at a directory anything else writes into.
configCODECALC_TOOLSa first-party knob: registers only a chosen slice of the
configCHANGELOG_GATE_BASE_REF
configGITHUB_REF
🔐 secretFAKE_API_KEY
configCODECALC_FUZZ_ITERATIONS
// 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

52/52 tools missing one or more hints — list_languages (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_execution_providers (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); execute_code (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +49 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.

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 2 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/the-40-thieves/codecalc)](https://m8ven.ai/mcp/the-40-thieves/codecalc)
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commit: 42848bd4af5aa2507f947545a4d2f71899223dde
code hash: ddd9f4f156942d6c5d0507ad1215cf1b186bd73a9b12f49acfc6fead238bc248
view raw JSON →
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