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A fast, local-first drawing and diagramming app. Sketch ideas, map out systems, and create diagrams — all without accounts, cloud sync, or network requests. Your data stays on your machine.

5 starsTypeScript

Napkin – desktop app for quick diagrams, with MCP support

Name: Napkin – desktop app for quick diagrams, with MCP support
Availability: InStock
Author: ipcrm

by ipcrm·Feb 19, 2026·3 points·0 comments

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AI Analysis

●●SolidNiche GemWizardry

The Take

Napkin keeps everything local while giving you an embeddable MCP endpoint so AI agents can draw and edit diagrams at http://127.0.0.1:21420/mcp. It combines Excalidraw-style hand-drawn tooling (rough.js, connectors, grid snapping, PNG/SVG export) with a Tauri/Rust desktop shell and delta-compressed version snapshots — a neat, concrete take on AI-assisted diagramming, though its impact hinges on MCP adoption and the surrounding agent ecosystem.

Post Description

Napkin is a simple app for quick diagrams, that works offline. Drawings are saved locally as JSON files with version history support. It also has an MCP server, so you can use AI tools to produce drawings.