GMC Builder MCP Lite

io.github.gmcfuertev0.1.1Updated Oct 5, 2026

Limited local read-only MCP companion: GMC Builder MCP Lite.

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Overview

AI-generated overview

A local read-only MCP companion that lists configured CMS site aliases, probes an authenticated connection, and summarizes supplied layout JSON.

What it does
GMC Builder MCP Lite exposes four read-only tools: it lists configured site aliases and platforms, performs one authenticated GET probe against a site and returns a sanitized status, lists up to ten builder element type names, and summarizes locally supplied layout JSON as node counts and types. It does not create, edit, publish, export, or import layouts or documents. It runs locally over stdio and is a limited free companion to a separate paid product.
When to use it
Use it when you want an assistant to check which CMS sites are configured, verify that a site's authoring API answers, or get a quick count and type summary of a layout JSON you already have. It is not suitable for authoring, bulk editing, backups, or full export/import, which the README assigns to the paid product.
Requirements
Python 3.10 or newer, installed from the GitHub repository rather than PyPI. A local sites.json copied from the example, with GMCBUILDER_MCP_LITE_SITES set to its absolute path. GMC Builder must be 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. Credentials are read from the environment variables named by username_env, password_env, and the Joomla token/key field.
Before you install
Credentials are supplied through environment variables such as username_env, password_env, and the Joomla token/key field; the README says never to put credential values in committed JSON or an MCP chat. The server makes authenticated GET requests to configured sites, so only sites you own or are authorized to access should be listed. HTTP is accepted only for exact loopback hosts. The README states that site integration and runtime tests have not been performed and that this initial release…

Installation

In SourceWeft

  1. Open GMC Builder MCP Lite in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

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

CapabilityLitePro product
Configured site aliasesYesYes
Authenticated connection probeYesYes
Up to 10 element types per callYesExtended tools
Local supplied JSON: node counts/typesYes, input up to 64 KiBDetailed inspection
Create/edit/publish layouts or documentsNoPaid functionality
Full export/import, bulk editing, backupsNoPaid functionality
Private Pro implementation or CMS companion sourceAbsentSeparately distributed

Contact [email protected] 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

console
git clone https://github.com/gmcfuerte/gmcbuilder-mcp-lite.gitcd gmcbuilder-mcp-litepython -m venv .venv

Windows:

console
.venv\Scripts\python.exe -m pip install .

macOS/Linux:

console
.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

  1. Copy sites.example.json to a local sites.json and keep only the sites you own or are authorized to access. The file is ignored by Git.
  2. 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.
  3. Set GMCBUILDER_MCP_LITE_SITES to the absolute path of that local JSON file.
  4. 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.
  5. Start with gmcbuilder_lite_list_sites, then gmcbuilder_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 from layout.example.json as layout_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 · [email protected]. Independent GMC software; product names belong to their respective owners.

Source: README.md at commit 294b754

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Version history

1
  1. v0.1.1LatestOct 5, 2026