SSH Fleet

Curated ssh_probe diagnostics and single-host ssh_exec over an allowlisted SSH fleet.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "ssh-fleet": {
      "command": "npx",
      "args": [
        "-y",
        "ssh-fleet"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

mcp-ssh-fleet

English | Русский

MCP server that gives an agent two tools over SSH to a fleet of hosts outside Kubernetes. The SSH key is a mounted secret (never enters model context); the inventory is a fail-closed allowlist.

Tools

ssh_probe(tags, check) — curated read-only diagnostics on every host carrying the given tags (AND semantics, like GitLab runner tags). check is one of a built-in set: uptime, disk, mem, failed, logs. Arbitrary commands cannot be passed. Class: read-only.
ssh_exec(host, command) — one arbitrary non-interactive command on ONE inventory host (by name or address; hosts outside the inventory are refused). Class: write-external: the server executes the command, while access gating (approval/RBAC) belongs to the MCP client.

Both: output size cap, per-host timeout, TOFU host-key check (fingerprint in logs), output as one section per host.

Configuration (env)

Variable	Default	Meaning
`SSH_FLEET_TRANSPORT`	`http`	`http` (StreamableHTTP, endpoint `/mcp`) \| `sse` \| `stdio`
`SSH_FLEET_ADDR`	`:8080`	listen address for http/sse
`SSH_FLEET_AUTH_TOKEN`	—	optional `X-MCP-AUTH` token
`SSH_FLEET_INVENTORY_PATH`	`/etc/ssh-fleet/inventory.yaml`	path to the inventory (configmap)
`SSH_FLEET_KEY_PATH`	`/etc/ssh-fleet/id_ed25519`	path to the private key (secret)
`SSH_FLEET_OUTPUT_CAP_BYTES`	`8192`	output cap per section
`SSH_FLEET_CMD_TIMEOUT_SECONDS`	`20`	per-host timeout
`SSH_FLEET_PROBE_CONCURRENCY`	`8`	probe parallelism pool
`SSH_FLEET_PROBE_MAX_HOSTS`	`50`	safety cap on hosts per probe

Inventory format — see deploy/inventory.example.yaml.

Quickstart (docker, stdio)

Terminal

docker run -i --rm \
  -v /path/to/inventory.yaml:/etc/ssh-fleet/inventory.yaml:ro \
  -v /path/to/id_ed25519:/etc/ssh-fleet/id_ed25519:ro \
  -e SSH_FLEET_TRANSPORT=stdio \
  ghcr.io/inhuman/mcp-ssh-fleet:latest

This is the shape MCP clients use when installing from the MCP Registry (io.github.inhuman/mcp-ssh-fleet).

Connecting an MCP client (http/sse)

By default the server speaks StreamableHTTP; register it as a regular HTTP MCP server with endpoint /mcp (URL like http://<host>:8080/mcp). Both tools become available to the client.

Client-side security recommendations:

ssh_probe is read-only (curated checks only) and can be granted broadly.
ssh_exec is arbitrary execution (write-external). Gate its access on the client side (approval / RBAC / user allowlist) — the server merely executes a command on an inventory host; it does not decide access policy.

Development

make test        # unit tests + e2e against a real in-process SSH server
make vet
make vulncheck
make build
make docker

Release: tag vX.Y.Z → GitHub Actions builds and publishes a multi-arch image to ghcr.io/inhuman/mcp-ssh-fleet.

Read the full README →View source on GitHub →

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Frequently Asked Questions about SSH Fleet

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "ssh-fleet": { "command": "npx", "args": ["-y", "SSH Fleet"] } }

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