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Testers.ai CARBON Test Harness Lite MCP Server

local only

Testers.ai CARBON Test Harness Lite runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 4 Oct 2026.

Local QA workflows, test evidence, screenshot maps and confidence reports for AI coding agents.

—
Installs / week
not published
1
Stars
0 open issues
4 Oct 2026
Last commit
from GitHub
MIT
License
JavaScript

What the code does

We read the source, 5 d ago · rules ccca72095570

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 carbon_demo.fixture → src/demo.mjs:51
  fs.writeFileSync(
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.

        proc = subprocess.run(
Runs an external command mcp/build.mjs:25, mcp/server.mjs:24
execFileSync(process.execPath, ['mcp/node_modules/@anthropic-ai/mcpb/dist/cli/cli.js', 'validate', path.join(stage, 'manifest.json')], { stdio: 'inherit' });
const read = rel => fs.readFileSync(path.join(base, rel), 'utf8');
Builds a database query by concatenation src/app.mjs:175
…rification</h3><p>${esc(f.verification)}</p></details><div class="feedback" data-finding="${esc(f.id)}"><label>Priority<select data-priority><option value="normal" ${feedback.priority === "normal" ? "selected" : ""}>Normal</option><option value="next" ${feedback.priority === "nex…

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

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Testers.ai CARBON Test Harness Lite — questions

Answers built from our own checks of this server.

Why is there no uptime for Testers.ai CARBON Test Harness Lite?
Testers.ai CARBON Test Harness Lite runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone.
Is Testers.ai CARBON Test Harness Lite open source?
Yes — it is published under the MIT licence, written in JavaScript and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.