openssh-server

Provides the OpenSSH server (sshd) for accepting inbound SSH connections and serving SSH features such as user authentication and remote command execution/file transfer over SSH.

Evaluated Apr 04, 2026 (25d ago)
Homepage ↗ Repo ↗ Infrastructure ssh server remote-access infrastructure sftp
⚙ Agent Friendliness
24
/ 100
Can an agent use this?
🔒 Security
42
/ 100
Is it safe for agents?
⚡ Reliability
49
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
0
Documentation
30
Error Messages
0
Auth Simplicity
50
Rate Limits
10

🔒 Security

TLS Enforcement
0
Auth Strength
70
Scope Granularity
10
Dep. Hygiene
55
Secret Handling
70

Security depends heavily on configuration and patch level. SSH can be strong when using key-based authentication, disabling password auth, restricting users/groups, and hardening ciphers/KEX and logging. There is no TLS layer (SSH transport is separate), no OAuth scope model, and operational protections (e.g., firewalls, rate limiting, Fail2ban, least privilege) are typically required.

⚡ Reliability

Uptime/SLA
20
Version Stability
75
Breaking Changes
60
Error Recovery
40
AF Security Reliability

Best When

You need standard, widely supported SSH server functionality for infrastructure access and can apply SSH hardening and key management best practices.

Avoid When

You only need a web API interface, or you cannot manage SSH host keys, user accounts, and access controls securely.

Use Cases

  • Enable secure remote shell access to Linux/Unix servers
  • Support SSH-based automation (e.g., remote commands, backups, deployments)
  • Provide secure tunnels/port forwarding over SSH
  • Serve as the SSH endpoint for SFTP/SCP file transfers

Not For

  • Providing a programmatic HTTP/GraphQL/gRPC API to agents
  • Multi-tenant application authentication/authorization beyond SSH user accounts/keys
  • Use as a public-facing service without careful hardening and monitoring

Interface

REST API
No
GraphQL
No
gRPC
No
MCP Server
No
SDK
No
Webhooks
No

Authentication

Methods: Public key authentication (authorized_keys) Password authentication (if enabled) Keyboard-interactive (if configured) Host-based authentication (if configured)
OAuth: No Scopes: No

Authentication is handled via SSH mechanisms (user accounts and/or keys). There is no OAuth/web-token scope model.

Pricing

Free tier: No
Requires CC: No

Self-hosted open-source software; cost is operational (hosting, maintenance, security hardening).

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • No API surface for agent workflows beyond making SSH connections; agents must implement SSH client logic.
  • Misconfiguration (weak ciphers/MACs/KEX, enabling passwords, permissive auth) can severely reduce security.
  • Connection retries can trigger SSH rate limiting/lockouts depending on configuration (e.g., Fail2ban).
  • Host key verification and known_hosts handling must be managed to avoid MITM risks.

Alternatives

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Scores are editorial opinions as of 2026-04-04.

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