How do I connect Plumb MCP Server to Claude?

Run `claude mcp add plumb-mcp -- npx -y plumb-mcp` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.

Is Plumb MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can Plumb MCP Server do?

Plumb MCP Server documents 22 tools to the agent, including plumb_assets, plumb_audit, plumb_brand. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

Plumb MCP

Unclaimed

by tathagat22

Local Figma MCP server with no REST rate limits, no metered tool-call quotas, and a verification loop. Drop-in alternative to Figma's Dev Mode MCP and Framelink for Claude Code, Cursor, Windsurf — works on every plan including Free.

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01 / Choose your client

02 / Before you connect

Authentication is not specified. Check the project instructions before connecting.

Install the runtime required by the project and make it available to your client.

Project instructionsEnvironment variable names (optional)

Use names from the project instructions, separated by commas. Enter names only, never secret values.

03 / Add the configuration

Source: generated from public install instructions

claude mcp add --transport stdio 'plumb-mcp' -- 'npx' '-y' 'plumb-mcp'

Run in your terminal after replacing any placeholders.

04 / Check it in your client

Open your client’s MCP settings and confirm the server connects and lists its tools. A copied configuration does not confirm a working connection.

aiai-coding-agentanthropicclaude-codeclaude-mcpcursordesign-to-codedesign-tokensdev-modefigmafigma-mcpfigma-pluginfree-tiermcpmcp-servermodel-context-protocoltypescriptwindsurf

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Security profile

Claimed and verified servers get a weekly static scan that shows what the code can reach: external services, environment variables, shell commands, agent configuration folders, plus any dependencies with known advisories. Claim this listing to get one. How the security profile works

22 of 22 tools

Documented tools (22)

From project documentation. A server handshake does not verify each tool’s description or behavior.

plumb_assets

Export icons (SVG) + images (PNG) — recursive, list, or surgical by ids.

plumb_audit

Heuristic accessibility checks — text contrast, button touch-target size.

plumb_brand

Brief → live-screenshots best-in-class reference sites + a synthesized brand palette/type board on the canvas.

plumb_components

List components + instance usages, plus an opt-in design-system health report (unused components, near-duplicate names, variant outliers).

plumb_describe

Text-only visual description — for image-blind harnesses.

plumb_design

Author a design from Plumb's high-level Design DSL and build it into Figma (full control: pages, sections, components, motion).

plumb_diff

Semantic diff between two PDS snapshots — "the hero moved from (0, 0) to (0, 120)", not a JSON diff.

plumb_emit_react

Deterministic React/JSX generator from a PDS or a plumbimportweb result — same emitter, either source.

plumb_fit

The self-healing loop: verify + a 0–100 convergence score + prioritised fixes.

plumb_import_web

Import a live webpage's structure and semantics — no Figma connection needed. Same role classifier Figma designs use.

plumb_node

Extract a screen as compact PDS — by id or by name.

plumb_outline

Every screen in the file (id, name, size).

plumb_query

Pull a slice (skeleton / buttons / text / components / role) when a full screen would blow the token budget.

plumb_review

The critique loop: blends a structural diff, a deterministic design rubric, and the calling agent's own vision verdict into one score + ranked fixes. No API key — the agent that drives the MCP server is the creative director.

plumb_screenshot

Render any node to PNG/JPG.

plumb_search

Find nodes by name and/or type.

plumb_selection

The user's live Figma selection.

plumb_source

Resolve on-brief assets (icons, photos, illustrations, patterns) for a design.

plumb_status

Self-description, key legend, connection state. Call first.

plumb_studio

The design director. One brief → researched references → extracted brand → a full composed Figma page. Returns the node ids + authored spec so you can critique and refine.

plumb_tokens

Design-token table (colours, type, radii, shadows).

plumb_verify

Diff rendered layout against the design — ΔE2000 colour, shadow/rotation/flex checks.

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about Plumb MCP Server

How do I connect Plumb MCP Server to Claude?: Run `claude mcp add plumb-mcp -- npx -y plumb-mcp` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.
Is Plumb MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can Plumb MCP Server do?: Plumb MCP Server documents 22 tools to the agent, including plumb_assets, plumb_audit, plumb_brand. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.