Contentrain vs arifOS — Constitutional AI Governance
Contentrain is an MCP server published by Contentrain. Marketplaces we read that list it: 2 (Official MCP Registry, Community GitHub marketplaces). arifOS — Constitutional AI Governance is an MCP server published by ariffazil. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-19. 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 |  Contentrain |  arifOS — Constitutional AI Governance |
|---|---|---|
| Official MCP Registry | Listed Version: 3.11.7 Downloads/month (npm): 14 220 Downloads/week (npm): 2 372 Forks (GitHub): 0 Stars (GitHub): 6 Not marked · First seen |
Listed, marked deprecated Version: 2026.03.22 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 | Contentrain | arifOS — Constitutional AI Governance |
|---|---|---|
| Marketplaces that list it (differs) | 2 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 6 (better) | 0 (worse) |
| Forks (GitHub) | 0 | 0 |
| Last release (differs) | 2026-10-18 | Not published |
| Where it runs (differs) | Remote server or your machine | Remote server (arifosmcp.arif-fazil.com/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 8 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/contentrain/ai | github.com/ariffazil/arifosmcp |
| Changes in the last 7 days (differs) | 6 | 1 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Answered with HTTP 404 (2 days ago) | Responded 4 days ago |
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
Contentrain
Git-native content governance for AI agents — 27 deterministic MCP tools over stdio and HTTP.
arifOS — Constitutional AI Governance
Constitutional AI governance: 11 mega-tools, 13 floors, VAULT999 ledger. Human-in-loop by design.
How to run each
Contentrain As a Claude Code plugin
/plugin marketplace add contentrain/ai
/plugin install contentrain@contentrainRequires: Authorization header
arifOS — Constitutional AI Governance As a remote MCP server
claude mcp add --transport http arifosmcp https://arifosmcp.arif-fazil.com/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only the endpoint of arifOS — Constitutional AI Governance responded at the last daily check. How we check endpoints
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: Contentrain · What it can do: arifOS — Constitutional AI Governance · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.