Field-by-field comparison

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MCPs in this comparison

KiCAD MCP ServerMCP Unity Editor (Game Engine)

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Comparable alternatives

Shown only when capability or industry context overlaps.

Side-by-side MCP evidence comparison
Evidence field	KiCAD MCP ServerMCP100 Selected	MCP Unity Editor (Game Engine)MCP100 Selected
Task fit
Best for	Assisting with KiCad project inspection and repetitive PCB or schematic editing tasks	Creating and editing Unity project assets, scenes, scripts, and editor state through supported AI coding clients
Not ideal for	Safety-critical electrical design or final design-rule approval without an experienced engineer	Older Unity projects or game-development tasks that do not require direct Editor control
Avoid when	You cannot version, inspect, and independently validate every generated design change	You cannot review or revert agent-made project and scene changes
Provenance
Provenance details	Community implementation github:mixelpixx · Publisher source ↗	Community implementation github:codergamester · Publisher source ↗
Maintenance
Maintenance details	Repo: Aug 14, 2026 Package: Not documented	Repo: Aug 10, 2026 Package: Not documented
Popularity evidence
GitHub stars	1,876 GitHub stars · checked 2026-08-14T18:46:26.000Z	1,865 GitHub stars · checked 2026-08-14T18:46:26.000Z
External adoption evidence	github: repository stars: 1,876Exact attributable signal.github: repository stars · Admission snapshot · checked 2026-08-14T18:46:26.000ZEvidence source ↗	github: repository stars: 1,865Exact attributable signal.github: repository stars · Admission snapshot · checked 2026-08-14T18:46:26.000ZEvidence source ↗
Client coverage
Client coverage details	Claude Code✓ Local stdio Claude Desktop✓ Local stdio Codex✓ Local stdio VS Code✓ Local stdio Cursor✓ Local stdio OpenCode✓ Local stdio	Claude Code✓ Local stdio Claude Desktop✓ Local stdio Codex✓ Local stdio VS Code✓ Local stdio Cursor✓ Local stdio OpenCode✓ Local stdio
Client coverage note	Local stdio runs on your computer. Streamable HTTP connects to a remotely hosted MCP server.
Access and data
Authentication	No authentication is documented for the local MCP server. JLCPCB live lookup optionally uses JLCPCB_APP_ID, JLCPCB_API_KEY, and JLCPCB_API_SECRET; local catalog search needs no credentials.	The WebSocket server defaults to localhost:8090. Remote instructions can bind it to 0.0.0.0; no bearer-token or OAuth mechanism is documented.
Cost	The MIT-licensed server lists no MCP fee. The JLCPCB guide says Basic parts have free assembly and Extended parts charge a $3 setup fee per unique part; manufacturing charges are separate.	The publisher describes the MIT-licensed project as free and open source. Unity, Node.js, hosting, client, and model costs are separate.
Permissions	Reads and writes KiCad boards, schematics, projects, libraries, and assets, with auto-save, UI control, autorouting, exports, and optional JLCPCB catalog and API operations.	Executes Unity menus and controls scenes, GameObjects, components, materials, assets, packages, tests, logs, play mode, and project-state resources through a WebSocket bridge.
Data handling	Local operations read and write design files and paths. Developer logs contain tool-call history, paths, and design details. Optional JLCPCB lookups send configured credentials and requests to JLCPCB; retention is not documented.	Unity scenes, assets, project state, and console logs are read or modified locally and returned through MCP. Remote transmission, retention, and telemetry are not documented.
Limitations
Tradeoffs	Automation can accelerate layout work, but malformed or electrically incorrect edits may look plausible and can become expensive after fabrication.	Direct Editor integration speeds iteration, but setup spans a Unity package and Node server and automated changes may leave the project in an invalid state.
Risk context	Auto-save, deletion, board and schematic writes, routing, and external integrations can damage designs or expose files and credentials. Use backups and version control, review writes, and protect environment files and logs.	Can make destructive project changes, install packages, execute menu items, and control play mode. Keep the bridge loopback-only and supervise all writes and deletions in a version-controlled project.
Evidence date
Editorial review	2026-08-11	2026-08-11
Candidate evidence	2026-08-14T18:46:26.000Z	2026-08-14T18:46:26.000Z

Popularity, maintenance, fit, permissions, and client support are independent evidence fields.

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