Polar Signals vs SSH — policy-gated remote access
Polar Signals is an MCP server published by docker. Marketplaces we read that list it: 1 (Docker MCP Catalog). SSH — policy-gated remote access is an MCP server published by tufantunc. Marketplaces we read that list it: 2 (Official MCP Registry, npm registry (MCP servers)). As of our marketplace pass on 2026-10-24. 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 |  Polar Signals |  SSH — policy-gated remote access |
|---|---|---|
| Docker MCP Catalog | Listed Version: not stated No figure published Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 2.20.2 Downloads/month (npm): 36 557 Downloads/week (npm): 3 891 Forks (GitHub): 129 Stars (GitHub): 819 Not marked · First seen |
| npm registry (MCP servers) | Not listed | Listed Version: 2.20.2 Downloads/month (npm): 36 557 Downloads/week (npm): 3 891 Forks (GitHub): 129 Stars (GitHub): 819 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 | Polar Signals | SSH — policy-gated remote access |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | No figure on GitHub | 819 |
| Forks (GitHub) (differs) | No figure on GitHub | 129 |
| Last release (differs) | Not published | 2026-10-23 |
| Where it runs (differs) | Remote server (api.polarsignals.com/api/mcp) | On your machine (ssh-mcp) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 1, secrets among them: 1 | 4, secrets among them: 3 |
| Licence (differs) | Apache-2.0 | MIT |
| Repository (differs) | Not stated | github.com/tufantunc/ssh-mcp |
| Changes in the last 7 days (differs) | 0 | 7 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 2 days ago | 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
Polar Signals
MCP server for Polar Signals Cloud continuous profiling platform, enabling AI assistants to analyze CPU performance, memory usage, and identify optimization opportunities in production systems.
SSH — policy-gated remote access
Policy-gated, audited SSH for Linux and Windows hosts: roles, approvals, and an audit log.
How to run each
Polar Signals As a remote MCP server
claude mcp add --transport http polar-signals https://api.polarsignals.com/api/mcp/Requires: POLAR_SIGNALS_API_KEY (secret)
SSH — policy-gated remote access As a local MCP server: npm package
claude mcp add --env "SSH_MCP_PASSPHRASE=<YOUR_SSH_MCP_PASSPHRASE>" --env "SSH_MCP_PASSWORD=<YOUR_SSH_MCP_PASSWORD>" --env "SSH_MCP_SUDO_PASSWORD=<YOUR_SSH_MCP_SUDO_PASSWORD>" --transport stdio ssh-mcp -- npx -y ssh-mcpRequires: SSH_MCP_PASSPHRASE (secret), SSH_MCP_PASSWORD (secret), SSH_MCP_SUDO_PASSWORD (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Polar Signals 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
Only Polar Signals asks for
POLAR_SIGNALS_API_KEY (secret)
Only SSH — policy-gated remote access asks for
SSH_MCP_KEYSSH_MCP_PASSPHRASE (secret)SSH_MCP_PASSWORD (secret)SSH_MCP_SUDO_PASSWORD (secret)
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Polar Signals · What it can do: SSH — policy-gated remote access · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Package data comes from the public npm registry (registry.npmjs.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.