Limited local read-only MCP companion: GMC Builder MCP Lite.
About
Limited local read-only MCP companion: GMC Builder MCP Lite.
Security Report
Well-designed read-only MCP server with strong security controls. Properly validates configuration, sanitizes URLs, implements request throttling and fail-stop mechanisms, uses environment variables for credentials, and maintains a strict allowlist for API endpoints. Minor code quality observations do not impact security posture. Supply chain analysis found 1 known vulnerability in dependencies (0 critical, 1 high severity).
5 files analyzed · 4 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-gmcfuerte-gmcbuilder-mcp-lite": {
"args": [
"gmcbuilder-mcp-lite"
],
"command": "uvx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
GMC Builder MCP Lite
Free limited companion to the GMC Pro product. This is a separate 0.1.1 client with a fresh history and only four read-only MCP tools. The Pro implementation is absent from this repository.
Lite and Pro
| Capability | Lite | Pro product |
|---|---|---|
| Configured site aliases | Yes | Yes |
| Authenticated connection probe | Yes | Yes |
| Up to 10 element types per call | Yes | Extended tools |
| Local supplied JSON: node counts/types | Yes, input up to 64 KiB | Detailed inspection |
| Create/edit/publish layouts or documents | No | Paid functionality |
| Full export/import, bulk editing, backups | No | Paid functionality |
| Private Pro implementation or CMS companion source | Absent | Separately distributed |
Contact gmcfuerte@gmail.com for the Pro product and current annual plans; see the GMC catalogue.
Lite is free to use under the limited commercial licence. Source visibility does not grant redistribution or resale rights.
Prerequisites
Python 3.10 or newer. GMC Builder installed on the target site: WordPress authoring API (2.0.0+) with an Application Password, or Joomla remote API (2.0.1+) with the shared X-Gmc-Builder-Key. This repository does not distribute GMC Builder. Obtain the CMS product through GMC; no layout-export endpoint is included in Lite.
Install from GitHub
git clone https://github.com/gmcfuerte/gmcbuilder-mcp-lite.git
cd gmcbuilder-mcp-lite
python -m venv .venv
Windows:
.venv\Scripts\python.exe -m pip install .
macOS/Linux:
.venv/bin/python -m pip install .
This Lite edition is distributed through this GitHub repository; it has not been published to PyPI. Do not install the separate full Pro package as a substitute for Lite.
Configure
- Copy
sites.example.jsonto a localsites.jsonand keep only the sites you own or are authorized to access. The file is ignored by Git. - Set the credential environment variables named by
username_env,password_env, and the applicable Joomla token/key field. Never put credential values in committed JSON or an MCP chat. - Set
GMCBUILDER_MCP_LITE_SITESto the absolute path of that local JSON file. - Add the server using
mcp.example.json: replace the placeholders with the absolute Python executable and configuration file paths. Ensure the MCP client passes the credential variables to its child process. - Start with
gmcbuilder_lite_list_sites, thengmcbuilder_lite_ping_site.
rest_mode: "query" supports WordPress without pretty REST URLs; otherwise
use pretty. Subdirectory installations are supported in the base URL.
Tools
gmcbuilder_lite_list_sites: aliases and platforms only.gmcbuilder_lite_ping_site: one authenticated GET, sanitized status only.gmcbuilder_lite_list_element_types: List at most ten builder element type names; no schema or kit export.gmcbuilder_lite_summarize_layout: pass the text fromlayout.example.jsonaslayout_json. Returns counts and types; no settings or content.
The server runs locally using stdio. No remote HTTP server, uploads, arbitrary URLs, SSH, license switch or Pro modules are included. Online tools use a fixed GET allowlist, verified TLS, no redirects, at most one request at a time per configured base URL, a two-second interval, and a 1 MiB response limit. HTTP is accepted only for exact loopback hosts. HTTP 403/415 stops subsequent requests to that base URL until restart.
Release status
Initial Lite release: source and package contents inspected and Python compiled. Site integration and runtime tests have not been performed. Do not treat this initial release as a production integration certification.
Contact
GMC · gmcfuerte@gmail.com. Independent GMC software; product names belong to their respective owners.
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