figbridge-mcp

Free, open-source, local MCP bridge for Figma. Runs on 127.0.0.1 and gives MCP agents a practical Figma-to-code loop.

Exposes 48 MCP tools — read screens, export tokens, lint the design system, recolor, clone frames, import a live URL into Figma, audit the imported design (palette / typography / a11y / whitespace / mobile), diff back to source code as a patch, and match a running app to its mockup with a codebase-aware visual-diff loop — to any client that speaks MCP: Claude Desktop, Claude Code, Cursor, Cline, etc.

Install

npx figbridge-mcp init

This patches your Claude Desktop config and prints the steps for importing the Figma plugin. Then:

1. Quit and reopen Claude Desktop.
2. In Figma: Plugins → Development → Import plugin from manifest… and pick plugin/manifest.json from the repo.
3. Run the Figbridge plugin, toggle Live bridge on.
4. In Claude: "What tools does figbridge expose?" — you should see 40+.

Updating

init writes a config of the form npx -y figbridge-mcp@latest, so every Claude Desktop launch pulls the current release. Nothing to do after a new version ships.

If you installed ≤ 0.1.1 (which baked an absolute path into your config), run once to self-heal:

npx figbridge-mcp@latest update

Flags / commands:

• init --pin — lock Claude to the currently installed copy (opts out of auto-updates).
• --version — print the installed version.
• bridge — start only the local HTTP+SSE bridge and keep it alive after stdin closes. Use for persistent local agent sessions and direct POST /command calls.
• doctor — reap orphan figbridge-mcp processes (a failed shutdown can leave :7331 held), and probe 7331..7340 for live bridges. Run if Claude shows "Server disconnected" or the plugin can't connect.

MCP registry

Also listed on the official Model Context Protocol registry as io.github.rudraptpsingh/figbridge. Clients that read the registry can discover + install without config edits. Verify: curl "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.rudraptpsingh/figbridge".

Ports

The HTTP+SSE bridge binds 127.0.0.1:7331 by default and auto-falls-back to 7332..7340 if something's already holding it. The Figma plugin probes the same range. Override the preferred starting port with FIGBRIDGE_PORT=NNNN.

For direct local workflows that should survive short-lived terminal sessions, run:

npx figbridge-mcp bridge

Normal MCP mode exits when stdin closes so MCP clients can clean up correctly. Bridge-only mode is intentionally persistent and exits only on process signals.

Tools

Read · get_current_selection · get_last_export · list_history · get_tokens · bridge_status · diff_since · list_pages · list_frames

Catalog · list_screens · list_components · describe_screen · export_app_spec · export_all_pages · list_assets · select_node · export_node

Act & Handoff · get_agent_bundle · clone_screen · recolor · apply_tokens · lint_ds

Browser · preflight_import (risk check before import, including font download URLs) · import_url (live URL → Figma frame; optional hybridSnapshot screenshot reference) · import_responsive_set (desktop / tablet / mobile and optional light / dark theme captures) · import_url_batch (bulk URL imports) · screenshot_url · probe_url · fingerprint_url · audit_interactions (hover / focus discovery) · verify_text_fidelity · measure_fidelity · audit_regression (baseline URL vs candidate URL frontend/UI regression audit)

Pillar 1 — round-trip editing · diff_to_source (per-text-node field diff between an imported Figma frame and the live source) · generate_patch (turn the diff into a minimal HTML/JSX patch against a source dir)

Pillar 2 — design intelligence audits · audit_palette · audit_typography · audit_a11y (WCAG 2.x contrast, landmarks, alt text) · audit_whitespace (padding/gap rhythm, 4/8-grid conformance) · audit_mobile (multi-viewport responsive: horizontal scroll, overflow-x, sub-44px touch targets, sub-12px text)

All audits return deterministic numbers — no model rewrites. audit_regression is the before/after gate: screenshot pixel diff, disappeared visible text, responsive issue deltas, and CSS-feature drift across desktop/tablet/mobile.

Pillar 3 — match the mockup · match_mockup (closed render → diff → refine loop: renders a running app and its target mockup, returns per-viewport visual scores, a prioritized punch-list of copy / color / typography / spacing / elevation / icon / structure differences, a design-language style fingerprint, and — with sourceDir — the source file to edit for each item) · diff_specs (fast structured field-level diff between two rendered URLs) · map_components (index an app's source tree — data-testid / component → file, plus design tokens — so diffs name the file to change and the token a literal should become)

Base style kits ship under kits/ (tokens + primitives per design language; cinematic-dark first) so design and code production start from a known-good, tokens-driven foundation.

The agent handoff bundle

get_agent_bundle returns a zip an agent can ship from offline: hierarchy.md, components.json, tokens.json, tokens.css, AGENTS.md, DESIGN.md, CHANGES.md, ISSUES.md, flow.mmd, responsive.md, manifest.json (sha-256 + token counts), screenshots/.

Three budget tiers (small 8k / medium 32k / large 128k tokens). Deterministic slugs that survive renames, so CHANGES.md is a real surgical diff instead of a whole-file retranslation.

Repo

https://github.com/rudraptpsingh/figbridge (MIT)