ssh-hub

MCP server that gives AI coding agents full access to remote machines over SSH. Connect to multiple servers simultaneously and use remote file operations, shell commands, and directory sync — all through the MCP tool interface.

Prerequisites

• Rust toolchain (1.70+)
• SSH agent with loaded keys (ssh-add) or SSH key files (~/.ssh/id_ed25519, etc.)
• SSH key authorized on the remote server — see docs/server-setup.md

Install

cargo install --git https://github.com/Perceptron-Studios/ssh-hub.git

Upgrade

ssh-hub upgrade

Quick start

# 1. Add a remote server
ssh-hub add <SERVER_ALIAS> user@host

# 2. Register as MCP in your project
ssh-hub mcp-install /path/to/project

Connection string formats

user@host                  # defaults to port 22, path ~
user@host:/path            # explicit path
user@host:2222             # custom port, path ~
user@host:2222:/path       # custom port and path

Identity files

For passphrase-protected keys, pass -i during add — ssh-hub will load the key into your SSH agent:

NOTE: If a phrase is required to access the private key, this command will ask for passphrase via ssh-add and store it securely.

ssh-hub add <SERVER_ALIAS> user@host -i ~/.ssh/my_key

CLI commands

Options: -v verbose logging, -i <path> identity file, -p <port> port override.

mcp-install flags: --claude (.mcp.json only), --codex (.codex/config.toml only). Defaults to both.

Authentication

All authentication is SSH-key based. No passwords are stored or transmitted. Keys are tried in order:

1. Identity file — key specified with -i during add (highest signal)
2. SSH agent — keys loaded via ssh-add, signing delegated to ssh-agent (capped at 10 keys)
3. Default keys — ~/.ssh/id_ed25519, id_rsa, id_ecdsa

RSA keys are automatically negotiated with SHA-256/SHA-512 signatures (modern servers reject legacy SHA-1).

MCP tools

All tools auto-connect to configured servers on first use — no manual connection step needed. Each tool takes a server parameter referencing a configured server name.

Discovery

• list_servers — Show configured servers with live reachability probes (TCP ping with latency)

Remote operations

• remote_bash — Execute shell commands (with optional timeout and background mode)
• remote_read — Read file contents (with offset/limit for large files)
• remote_write — Write content to a file
• remote_edit — Edit a file using string replacement
• remote_glob — Find files matching a glob pattern

Sync

• sync_push — Push local files or directories to remote (tar streaming for directories)
• sync_pull — Pull remote files or directories to local (tar streaming for directories)

Configuration

Server configs are stored in ~/.config/ssh-hub/servers.toml (macOS: ~/Library/Application Support/ssh-hub/servers.toml):

[servers.staging]
host = "staging.example.com"
user = "deploy"
port = 2222
remote_path = "/var/www/app"
identity = "~/.ssh/id_staging"

[servers.prod]
host = "prod.example.com"
user = "deploy"
remote_path = "~"

License

MIT