| FMRS | 59 / 100 · C | 77 / 100 · B | 75 / 100 · B |
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| Reliability | 8 / 20 | 12 / 20 | 13 / 20 |
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| Security and permissions | 12 / 20 | 16 / 20 | 12 / 20 |
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| Maintenance | 11 / 20 | 16 / 20 | 16 / 20 |
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| Documentation | 15 / 20 | 18 / 20 | 17 / 20 |
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| Setup experience | 13 / 20 | 15 / 20 | 17 / 20 |
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| Best for | - Teams already using the OpenPencil desktop app or CLI who want AI agents to automate design workflows
- Developers who need local, offline, account-free read/write access to Figma-compatible files
- Engineering teams wanting to integrate design-file inspection or export into CI pipelines
| - Hevy PRO users who want AI assistants to directly access their workout data
- People who prefer using MCP clients like Claude, Cursor, Codex for fitness tracking
- Anyone needing summaries and insights from their training data
| - Scenarios needing clean, structured web context fed to an AI assistant
- Users already on the Firecrawl platform who want to call its scraping capability directly via MCP
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| Not for | - Users who require official Figma support or an officially hosted service (OpenPencil is an unofficial third-party alternative, not affiliated with Figma)
- Scenarios needing strictly read-only, minimal-privilege access (the eval capability runs the full Figma Plugin API, i.e. arbitrary scripts)
- Non-technical users who are not comfortable with command-line tools or MCP client configuration
| - Users without a Hevy PRO subscription (API key required)
- Users who want to use the server without an API key
- Those needing delete workflows (Hevy API does not expose delete endpoints)
| - Simple static-page scraping where you don't want to depend on a third-party API and incur call costs
- Sites that explicitly disallow automated access (robots.txt)
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| Required permissions | - Local filesystem read/write, scoped by OPENPENCIL_MCP_ROOT (defaults to the current working directory)
- RPC access to the live document/canvas when the desktop app is running
- Local network listening on a Unix socket and 127.0.0.1:7600 when using the HTTP transport
| - Requires HEVY_API_KEY environment variable for Hevy API authentication
- Can create, update, and replace workouts, routines, folders, templates, and body measurements via tools
- Read operations can fetch workouts, routines, folders, templates, history, and user info
| - Requires a Firecrawl API key to call; cost and quota are governed by the Firecrawl account
- firecrawl_agent/firecrawl_interact perform automated browser interaction, which may trigger login or form-submission flows on the target site
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| Risks and side effects | - The eval-related capability exposes the full Figma Plugin API, allowing arbitrary scripts to run against a design file — risk of accidental or malicious data modification/deletion
- The project is explicitly under active development with acknowledged rough edges, so behavior can change between releases
- It is an unofficial, community-built Figma alternative, not endorsed by or affiliated with Figma or an MCP protocol owner
| - API key can be misused if leaked; do not expose in URLs, logs, or screenshots
- Create operations may produce duplicates on retry; update operations replace existing records
- The server sends data to the Hevy API and may send telemetry to external services unless disabled
| - Bulk crawl/map tools can generate significant request volume against a target site — respect the site's rate limits and terms of service
- firecrawl_agent's interactive action chain is longer — define task boundaries clearly before running it to avoid accidentally triggering actions on a sensitive site
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| Supported clients | Claude Code, Cursor, Windsurf | Claude Desktop, Cursor, Codex, Google Antigravity | Claude Desktop, VS Code, Cursor, Windsurf, Zed, Amp |
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| Tools | 0 | 26 | 11 |
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