A0 vs GPTaria MCP
A0 is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑15.
A0 is a plugin bundle for AI coding tools published by Joe Simo. No marketplace we read lists it any more. GPTaria MCP is an MCP server published by gptaria-mcp. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-25. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.
Where each is published
| Marketplace |  GPTaria MCP | |
|---|---|---|
| Community marketplace joe-simo/a0 | Removed on 2026-10-15 Version: 0.8.16 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.2.1 Downloads/month (npm): 129 Downloads/week (npm): 21 Forks (GitHub): 0 Stars (GitHub): 0 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 | A0no longer listed · | GPTaria MCP |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 1 |
| Stars (GitHub) | 0 | 0 |
| Forks (GitHub) | 0 | 0 |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (gptaria-mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Hooks it runs (differs) | 1 | Not published |
| Parts of the bundle (differs) | 6 | Not a bundle |
| Licence | MIT | MIT |
| Repository (differs) | github.com/joe-simo/a0 | github.com/gptaria-mcp/gptaria-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-13 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.
What to use instead of A0
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Build an MCP server and bundle your tools into a shareable plugin, end to end. Two skills: build-mcp scaffolds one server; build-plugin packages skills, hooks, agents, and MCP…
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anthropic-plugin-dev
Plugin development toolkit for hooks, MCP servers, commands, and skills.
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Author Claude Code skills and hooks, whether they live in a plugin, a project's .claude/, or ~/.claude
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Core agents and commands required by all plugins
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Set up SkillRoll and author or audit Agent Skills and Markdown behavior cases.
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Specialized development skills for feature development and code review workflows.
What each says it does
A0
A0 language skill, the a0 MCP server, an after-edit check hook and A0 commands.
GPTaria MCP
Post a project brief & publish cases on GPTaria from Claude Code, Cursor or Windsurf.
How to run each
A0
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
GPTaria MCP As a local MCP server: npm package
claude mcp add --env "GPTARIA_API_KEY=<YOUR_GPTARIA_API_KEY>" --transport stdio gptaria-mcp -- npx -y gptaria-mcpRequires: GPTARIA_API_KEY (secret)
Commands 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
The marketplaces of A0 publish no settings it asks for, so we do not compare settings.
What it can do: A0 · What it can do: GPTaria MCP · 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. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.