Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall vs io.github.revsmoke/promptrejectormcp
Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall is an MCP server published by agentdiet.dev. Marketplaces we read that list it: 1 (Official MCP Registry). io.github.revsmoke/promptrejectormcp is an MCP server published by revsmoke. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-28. 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 |  Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall |  io.github.revsmoke/promptrejectormcp |
|---|---|---|
| Official MCP Registry | Listed Version: 7.0.17 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 1.0.1 Downloads/month (npm): 576 Downloads/week (npm): 34 Forks (GitHub): 3 Stars (GitHub): 2 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 | Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall | io.github.revsmoke/promptrejectormcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 0 (worse) | 2 (better) |
| Forks (GitHub) (differs) | 0 (worse) | 3 (better) |
| Last release (differs) | 2026-10-21 | Not published |
| Where it runs (differs) | Remote server (mcp-security.agentdiet.dev/mcp) | On your machine (prompt-rejector) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 1, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/robertoyanguas-ops/assay | github.com/revsmoke/promptrejectormcp |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen (differs) | 2026-10-21 | 2026-10-11 |
| Endpoint at the last check (differs) | Not responding since 2026-10-28 | no remote endpoint we check |
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
Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall
Real-time MCP & A2A prompt-injection, jailbreak, and tool-schema poisoning firewall for AI agents.
io.github.revsmoke/promptrejectormcp
Security gateway for AI agents: detects prompt injections, jailbreaks, and common vulnerabilities.
How to run each
Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall As a remote MCP server
claude mcp add --transport http mcp-security https://mcp-security.agentdiet.dev/mcpio.github.revsmoke/promptrejectormcp As a local MCP server: npm package
claude mcp add --env "YOUR_API_KEY=<YOUR_YOUR_API_KEY>" --transport stdio promptrejectormcp -- npx -y prompt-rejectorRequires: YOUR_API_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall 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 Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall publish no settings it asks for, so we do not compare settings.
What it can do: Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall · What it can do: io.github.revsmoke/promptrejectormcp · Compare two other plugins
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.