Chamber MCP Server

by ceedot-rock Your server? Claim it

local only

Chamber runs on your own machine — the client starts it, so there is no endpoint to ping. 41 installs a week from npm. Last commit 17 Oct 2026.

Two-key JSON seal/open. Cloak needs a live license. Open is keys-only.

Installs per day peak 138 · avg 12 · +30% w/w

a month agotoday

Installs / week

npm · json-chamber-mcp

Stars

0 open issues

17 Oct 2026

Last commit

1 release in 90 days

AGPL-3.0-or-later

License

TypeScript

Nothing serious here today

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

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.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add json-chamber-mcp -- npx -y json-chamber-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "json-chamber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.json-chamber-mcp]
command = "npx"
args = ["-y", "json-chamber-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "json-chamber-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "json-chamber-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "json-chamber-mcp"
      ]
    }
  }
}

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Chamber — questions

Answers built from our own checks of this server.

Why is there no uptime for Chamber?

Chamber 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 json-chamber-mcp was installed 41 times last week.

How do I connect Chamber?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls json-chamber-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Chamber?

The npm package json-chamber-mcp was installed 41 times in the last week. Week over week that is +30%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Chamber open source?

No, and the distinction matters: its licence is declared as AGPL-3.0-or-later. That makes it source-available — you can read the code, but the terms are the author's own, not one of the recognised open-source licences. Read them before you build on it.