Agent Compatibility vs io.github.Rul1an/assay
Agent Compatibility is a plugin bundle for AI coding tools published by Cursor. Marketplaces we read that list it: 1 (Cursor: cursor/plugins). io.github.Rul1an/assay is an MCP server published by Rul1an. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-12. 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 | ||
|---|---|---|
| Cursor: cursor/plugins | Listed Version: 1.0.0 Forks (GitHub): 1 066 Stars (GitHub): 11 026 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed, marked deprecated Version: 3.1.0 Forks (GitHub): 3 Stars (GitHub): 12 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 | Agent Compatibility | io.github.Rul1an/assay |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 11 026 (better) | 12 (worse) |
| Forks (GitHub) (differs) | 1 066 (better) | 3 (worse) |
| Last release (differs) | Not published | 2026-10-12 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (https://github.com/Rul1an/assay/releases/download/v3.1.0/assay-mcp-cli-v3.1.0-x86_64-unknown-linux-gnu.tar.gz) |
| 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 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/cursor/plugins | github.com/rul1an/assay |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen | 2026-10-11 | 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
Agent Compatibility
CLI-backed repo compatibility scans plus agents that audit startup, validation, and docs against reality.
io.github.Rul1an/assay
The firewall for MCP tool calls. Block, audit, replay with evidence bundles.
How to run each
Agent Compatibility
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
io.github.Rul1an/assay
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
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
Neither one's marketplaces publish the settings it asks for.
What it can do: Agent Compatibility · What it can do: io.github.Rul1an/assay · Compare two other plugins
Data comes from the public marketplace file https://github.com/cursor/plugins/blob/HEAD/.cursor-plugin/marketplace.json. 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.