extension-mcp vs io.github.SAP/mdk-mcp-server
extension-mcp is a plugin bundle for AI coding tools published by Cezar Augusto. Marketplaces we read that list it: 1 (Community GitHub marketplaces). io.github.SAP/mdk-mcp-server is an MCP server published by SAP. Marketplaces we read that list it: 3 (Official MCP Registry, Claude Code: claude-plugins-official, Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-13. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  io.github.SAP/mdk-mcp-server | |
|---|---|---|
| Community marketplace extensiondev/mcp | Listed Version: 10.11.6 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.0 Downloads/month (npm): 39 782 Downloads/week (npm): 11 083 Forks (GitHub): 10 Stars (GitHub): 37 Not marked · First seen |
| Claude Code: claude-plugins-official | Not listed | Listed Version: 0.5.0 Forks (GitHub): 10 Stars (GitHub): 37 Not marked · First seen |
| Claude Code: claude-plugins-community | Not listed | Listed Version: 0.4.0 Forks (GitHub): 10 Stars (GitHub): 37 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | extension-mcp | io.github.SAP/mdk-mcp-server |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 3 (better) |
| Stars (GitHub) (differs) | 0 (worse) | 37 (better) |
| Forks (GitHub) (differs) | 0 (worse) | 10 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (@extension.dev/mcp) | On your machine (@sap/mdk-mcp-server) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 5 | 1 |
| Licence | Apache-2.0 | Apache-2.0 |
| Repository (differs) | github.com/extensiondev/mcp | github.com/sap/mdk-mcp-server |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen (differs) | 2026-10-13 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
extension-mcp
MCP tools for browser extension development: scaffold from 50+ templates, run the dev server with HMR, inspect the live DOM and logs, and build store-ready bundles for Chrome, Edge, and Firefox.
io.github.SAP/mdk-mcp-server
Model Context Protocol (MCP) server for AI-assisted development of MDK applications.
How to run each
extension-mcp As a Claude Code plugin
/plugin marketplace add extensiondev/mcp
/plugin install extension-mcp@extensiondev-mcpio.github.SAP/mdk-mcp-server As a local MCP server: npm package
claude mcp add --transport stdio mdk-mcp-server -- npx -y @sap/mdk-mcp-serverCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: extension-mcp · What it can do: io.github.SAP/mdk-mcp-server · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.