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Compare MCP servers

Compare scores, permissions, risks, and fit in one decision-focused table.

DimensionFreeCAD MCP ServerControl FreeCAD from Claude Desktop via this MCP server.MartinLoop MCP ServerAn independent control layer that gives AI coding agents budgets, brakes, and receipts
FMRS59 / 100 · C79 / 100 · B
Reliability8 / 2012 / 20
Security and permissions12 / 2018 / 20
Maintenance14 / 2016 / 20
Documentation13 / 2018 / 20
Setup experience12 / 2015 / 20
Best for
  • Designers and engineers who want to interact with FreeCAD via Claude Desktop
  • Developers and hobbyists looking to automate CAD workflows
  • Engineering teams scaling AI coding agents while controlling spend
  • Platform teams that need auditable, rollback-aware agent execution records
  • Organizations using multiple agents (Claude, Codex, Gemini) under one governed flow
Not for
  • Teams requiring real-time collaboration
  • Environments that demand absolute control over CAD precision
  • Users who prefer not to install a FreeCAD plugin
  • Developers who just want a simple code-completion helper without run governance
  • Teams unwilling to accept local JSONL run records with HMAC signing
  • Environments without a supported adapter (Claude/Codex/Gemini CLIs, direct provider, or verifier-only)
Required permissions
  • Requires running FreeCAD and the RPC server locally or remotely
  • Needs file system access to read/write FreeCAD documents and plugins
  • Allows executing arbitrary Python code, so use with caution
  • Read/write access to the configured repo root (writable scope restrictable via --allow-path/--deny-path)
  • Ability to invoke the chosen agent CLI (Claude/Codex/Gemini, etc.) and its underlying model account
  • Local disk writes for run records, receipts, and share outputs (share/run-receipt., etc.)
  • Execution of user-configured verifier commands (e.g. npm test)
Risks and side effects
  • Malicious prompts could lead to arbitrary code execution, posing security risks
  • Remote connections may expose unauthorized access; configure allowed IPs or CIDR subnets
  • Tools may produce many screenshots, increasing bandwidth and storage usage
  • Verifier commands are executed; poorly chosen verifier commands carry security risk despite preflight policy checks
  • Cost and token figures may be estimates (labeled with provenance) and should not be treated as settled accounting
  • Receipt integrity must be verified before use as trustworthy evidence; missing rollback evidence is flagged as EVIDENCE_BOUNDARY
  • Policy defaults come from martin.config.yaml and can be overridden by CLI flags; misconfiguration can loosen safety boundaries
Supported clientsClaude DesktopClaude Code, Codex, Gemini CLI, Cursor, VS Code, GitHub Copilot, Continue
Tools110