mcpbeat Sign in

Assay MCP Server

local only

Assay MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 18 Sep 2026.

Policy-enforcing MCP proxy with portable evidence output.

Installs / week
not published
10
Stars
54 open issues
18 Sep 2026
Last commit
from GitHub
MIT
License
Rust

What the code does

We read the source, 21 h ago · rules 3dff92dd89df

A tool parameter reaches a dangerous call

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

A tool parameter reaches a file or shell call safe_reader.path → runner-fixtures/openai-agents/fixture-agent.js:156
      const contents = fs.readFileSync(input.path, 'utf8');
Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Installs itself into autostart infra/bpf-runner/health_check.sh:1086
    crontab_output=$(LC_ALL=C crontab -l 2>&1) || crontab_status=$?
Builds a database query by concatenation .github/workflows/docs-auto-update.yml:58
      - name: Update architecture diagrams
        run: |
          chmod +x scripts/docs/update-architecture-docs.sh

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

A tool parameter here reaches a dangerous call

That is not a flaw by itself — but it is where things go wrong when it is not the job. We re-read this code on every release. Watch it and you hear from us the day another one appears.

Three servers free · no card

Alternatives to Assay MCP Server

same job, measured the same way
MCP Gateway
by authzx

AuthzX MCP Gateway — policy-enforcing proxy between AI agents and MCP servers

local only
MCPower Security Proxy
by ai-mcpower

Security proxy that wraps MCP servers with real-time monitoring and policy enforcement

301 installs/wk local only
MCP Output Firewall
by tangfei7777-cell

Three-layer firewall for MCP: content, egress and action policy. Proxy or server.

31 installs/wk local only
I
Dev Proxy Tools
by dev-proxy-tools

MCP server for Dev Proxy that enables AI assistants to interact with Dev Proxy.

40 installs/wk local only
MCPower Security Proxy
by mcpower-security

Security proxy that automatically wraps MCP servers with real-time monitoring and policy enforcement

local only
Opencut Controller
by jxue0

Professional MCP server for video editing automation with OpenCut.

51 installs/wk local only
Shield
by bolyra

Stdio MCP auth proxy: wrap any MCP server with per-tool permission enforcement.

35 installs/wk local only
Mnki MCP
by mnkiagentos

MCP proxy that checks every tools/call against Agent Trust policy, with evidence, before it runs.

420 installs/wk local only

Assay MCP Server — questions

Answers built from our own checks of this server.

Why is there no uptime for Assay MCP Server?
Assay MCP Server runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone.
Is Assay MCP Server open source?
Yes — it is published under the MIT licence, written in Rust, 10 stars on GitHub and 54 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.