AIPost MCP Server vs Contentrain
AIPost MCP Server is an MCP server published by AIPOST-EMAIL. Marketplaces we read that list it: 1 (Official MCP Registry). Contentrain is an MCP server published by Contentrain. Marketplaces we read that list it: 2 (Official MCP Registry, Community GitHub marketplaces). As of our marketplace pass on 2026-10-17. 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 |  AIPost MCP Server |  Contentrain |
|---|---|---|
| Official MCP Registry | Listed Version: 1.1.1 Downloads/month (npm): 573 Downloads/week (npm): 49 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 3.11.3 Downloads/month (npm): 14 220 Downloads/week (npm): 2 372 Forks (GitHub): 0 Stars (GitHub): 6 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 | AIPost MCP Server | Contentrain |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 0 (worse) | 6 (better) |
| Forks (GitHub) | 0 | 0 |
| Last release (differs) | Not published | 2026-10-16 |
| Where it runs (differs) | On your machine (@aipost/mcp-server) | Remote server or your machine |
| Transport (differs) | stdio | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 3, secrets among them: 1 | Not published |
| Parts of the bundle (differs) | Not a bundle | 8 |
| Licence (differs) | Not stated | MIT |
| Repository (differs) | github.com/aipost-email/mcp-server | github.com/contentrain/ai |
| Changes in the last 7 days (differs) | 0 | 3 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Answered with HTTP 404 (25 h 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
AIPost MCP Server
Typed structured messaging for AI agents via AIPost.email with Ed25519 signing
Contentrain
Git-native content governance for AI agents — 27 deterministic MCP tools over stdio and HTTP.
How to run each
AIPost MCP Server As a local MCP server: npm package
claude mcp add --env "AIPOST_API_KEY=<YOUR_AIPOST_API_KEY>" --transport stdio aipost-mcp-server -- npx -y @aipost/mcp-server -y @aipost/mcp-serverRequires: AIPOST_API_KEY (secret)
Contentrain As a Claude Code plugin
/plugin marketplace add contentrain/ai
/plugin install contentrain@contentrainRequires: Authorization header
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Contentrain has a remote endpoint we 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
The marketplaces of Contentrain publish no settings it asks for, so we do not compare settings.
What it can do: AIPost MCP Server · What it can do: Contentrain · 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.