Rftools MCP Server

227 RF & electronics calculators + 13 simulation tools for AI agents. Its 5 documented tools cluster into read & search, run & execute. It runs locally over stdio via the published package.

People connecting design tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-19 · ★ 6 · #22 OF 74 MAINTAINED DESIGN · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Rftools

before you install - you'll need

RFTOOLS_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add antonpogrebenko-public-rftools-mcp -- npx -y rftools-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "antonpogrebenko-public-rftools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "rftools-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package rftools-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.antonpogrebenko-public is GitHub-verified and matches the repo owner

03 · What Rftools can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can list available calculators, optionally filtered by category, get detailed info about a calculator - inputs with units/defaults, outputs, and the formula used, and list all 13 available simulation tools with their jobType identifiers and parameter reference.

Capability map

Tools grouped from the project's README - what Rftools lets an agent do.

read & search

3 tools - e.g. List available calculators, optionally filtered by category.; Get detailed info about a calculator - inputs with units/defaults, outputs, and the formula used.; List all 13 available simulation tools with…

list_calculators · get_calculator_info · list_simulation_tools

run & execute

2 tools - e.g. Run a calculator with specific inputs. Returns results with units and a link to the interactive version on rftools.io. Runs locally - instant, no quota consumed; Submit a simulation job and wait for the…

run_calculation · run_simulation

04 · Who maintains Rftools

rftools is maintained by antonpogrebenko-public. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository
github.com/antonpogrebenko-public/rftools-mcp
category
design - ranked #22 of 74 actively-maintained design servers as of 2026-08-25.
registry
io.github.antonpogrebenko-public/rftools (active, first published 2026-03-05 · 7 versions)
packages
npm:rftools-mcp

06 · Rftools FAQ

Is Rftools still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-19. We re-verify nightly.

What can Rftools do?

With this server connected, an agent can list available calculators, optionally filtered by category, get detailed info about a calculator - inputs with units/defaults, outputs, and the formula used, and list all 13 available simulation tools with their jobType identifiers and parameter reference.

How do I install Rftools?

Run `npx -y rftools-mcp`. The README documents one environment variable (RFTOOLS_API_KEY) to set first. You can also paste the ready-made client config above.

Does Rftools run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Rftools

Alternatives to Rftools

Maintained design servers if Rftools isn't the fit.

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  2. Figma MCP Server (figma) The Figma MCP server brings Figma design context directly into your AI workflow. ★ 1,915 · 2026-08-20
  3. Type UI Design systems, UI prompts, and layout variations for AI coding tools. ★ 1,816 · 2026-07-04
  4. Openflowkit MCP Local-first OpenFlowKit diagramming tools for Claude, Cursor, Windsurf & other MCP clients. ★ 731 · 2026-08-19
  5. Fable Cut Zero-dependency browser video editor AI agents drive via a JSON timeline over MCP; ffmpeg export. ★ 627 · 2026-08-24
  6. Photoshop MCP MCP server for Adobe Photoshop - 102 tools (generative AI + recipes), standalone web UI. Control Ph… ★ 348 · 2026-08-10

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