Wiring Diagram MCP Server

If you already use Wiring Diagram MCP, the wiring diagram mcp mcp server is the piece that lets your assistant work with it directly. MCP server that generates 12V/24V/48V wiring diagrams and sizes wires, fuses, batteries, solar arrays, and inverters for campers, boats, and off-grid systems.

What the server does

An MCP server that gives Claude (or any MCP-compatible AI) domain expertise in 12V / 24V / 48V electrical systems — sizing the bank, picking the wire gauge, recommending the fuse, and generating a complete wiring diagram. For boats, campers, vans, and off-grid builds.

Issues, ideas, and pull requests welcome on GitHub.

Available tools

The toolset is worth reading before you wire it up, because it tells you what the integration is really for:

• Multi — bank topologies: starter + house with combiner / DC-DC charger
• calculate_power_budget — Daily energy draw from a list of loads (Wh, Ah, peak power)
• calculate_battery_bank — Bank size for given consumption + autonomy + DoD
• calculate_battery_config — Series/parallel arrangement to hit a target voltage and capacity
• calculate_solar_size — Panel wattage to recharge daily, accounting for sun hours and losses
• calculate_wire_gauge — AWG / mm² for current and run length, with fuse recommendation
• calculate_inverter_size — Inverter wattage for AC loads, with surge headroom and DC current draw
• calculate_charging_time — Time from X% to Y% SoC, with bulk and absorption phases
• generate_wiring_diagram — Complete schematic as SVG or PNG, auto-fused and protected
• list_component_types — Component reference and example configs for diagram building
• VOLTPLAN_API_URL — https://voltplan.app
• PORT — 3001

Installation

Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.

Credentials and setup notes

Configuration is passed through the environment: VOLTPLAN_API_URL. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

Where it fits

Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Wiring Diagram MCP's toolset — Multi, calculate_power_budget, calculate_battery_bank and 10 more — is a fair guide to whether it matches your workflow. It is maintained by yuzu-hub; worth a glance at recent repository activity before you build anything load-bearing on it.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

Worth knowing first

• Your data travels to the provider's service, so the usual questions apply about what you send and what they retain.
• With 13 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch Wiring Diagram MCP.
• Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
• Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.