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FetchSandbox MCP Server

by fetchsandbox Your server? Claim it
local only

FetchSandbox runs on your own machine — the client starts it, so there is no endpoint to ping. 1 014 installs a week from npm. Last commit 18 Sep 2026.

A deterministic verification engine for agents. Proves a fix: fails on the old code, passes on new.

Installs per day peak 513 · avg 63 · -20% w/w
a month agotoday
1 014
Installs / week
npm · fetchsandbox-mcp
1
Stars
0 open issues
18 Sep 2026
Last commit
0 releases in 90 days
MIT
License
TypeScript

Nothing serious here today

Today is the operative word: we check FetchSandbox every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add mcp -- npx -y fetchsandbox-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "fetchsandbox-mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mcp]
command = "npx"
args = ["-y", "fetchsandbox-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "fetchsandbox-mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "fetchsandbox-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: FETCHSANDBOX_API_KEY (Optional. Sign in without a browser — useful in CI. Left unset, the server runs anonymously and asks you to sign in the first time a run produces a receipt.), FETCHSANDBOX_TELEMETRY (Set to '0' to disable anonymous usage telemetry.), FETCHSANDBOX_BASE_URL (Override the FetchSandbox backend base URL (defaults to https://fetchsandbox.com). Useful for stage/self-hosted testing.). The author declared them in the registry entry; get the values from the project itself.

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FetchSandbox — questions

Answers built from our own checks of this server.

Why is there no uptime for FetchSandbox?
FetchSandbox runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package fetchsandbox-mcp was installed 1 014 times last week.
How do I connect FetchSandbox?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls fetchsandbox-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use FetchSandbox?
The npm package fetchsandbox-mcp was installed 1 014 times in the last week. Week over week that is -20%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is FetchSandbox open source?
Yes — it is published under the MIT licence, written in TypeScript 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.