PTY MCP Server

MCP server providing PTY (pseudo-terminal) execution capabilities to AI agents. Enables agents to run interactive terminal commands via PTY — supporting programs that require a TTY, handling interactive prompts, and managing long-running terminal sessions. Written in Haskell.

Evaluated Mar 06, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Developer Tools pty terminal shell interactive tty mcp-server haskell

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Full shell/PTY access — high privilege. Restrict to trusted contexts. Can run any command.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

A developer needs AI agents to run interactive CLI programs that require a PTY — tools that prompt for input, use terminal control codes, or require a real TTY environment to function.

Avoid When

Your commands don't need interactive TTY. Using PTY for simple commands adds complexity. Also: PTY access is powerful — restrict to trusted contexts.

Use Cases

• Running interactive terminal applications that require PTY from AI agents
• Executing commands that prompt for interactive input in automated workflows
• Managing long-running shell sessions with proper terminal handling via AI agents
• Debugging and testing CLI tools that require real TTY environments

Not For

• Simple non-interactive command execution (use standard bash/shell MCP instead)
• Security-sensitive environments where shell access should be restricted
• Teams unfamiliar with PTY/TTY concepts and their security implications

Interface

REST API

GraphQL

gRPC

MCP Server

Yes ↗

SDK

Webhooks

Authentication

Methods: none

OAuth: No Scopes: No

No authentication — local shell execution via PTY. Access controlled by OS user permissions.

Pricing

Model: free

Free tier: Yes

Requires CC: No

Free open source. Requires Haskell/GHC for compilation.

Agent Metadata

Pagination

none

Idempotent

Partial

Retry Guidance

Not documented

Known Gotchas

⚠ PTY gives full shell access — only use in trusted, controlled environments
⚠ Interactive programs may wait for input indefinitely — implement timeouts for agent use
⚠ Requires Haskell toolchain for compilation — adds complexity to setup
⚠ Terminal escape codes in output can confuse agents reading raw PTY output

Alternatives

mcp-server-bash shell-mcp-server subprocess-mcp

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for PTY MCP Server.

$99

API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.