Napkin.AI MCP Server

Disclaimer: This is an unofficial, community-maintained MCP server for Napkin AI. It is not affiliated with, endorsed by, or officially supported by Napkin AI or Second Layer, Inc. For official Napkin AI products and support, please visit napkin.ai.

API Compatibility: Tested with Napkin AI API v0.10.5. Newer API versions may introduce breaking changes.

An MCP (Model Context Protocol) server for generating infographics and visuals using the Napkin AI API. This server enables AI assistants like Claude to generate professional visuals from text content.

Features

• Visual Generation: Generate SVG, PNG, or PPT visuals from text content
• Multiple Visual Types: Mindmaps, flowcharts, timelines, comparisons, and more (see gallery)
• Async Handling: Automatic polling for Napkin AI's async generation
• Multi-Storage Support: Save generated visuals to:
  • Local filesystem
  • Amazon S3 (or S3-compatible services)
  • Google Drive
  • Slack
  • Notion
  • Telegram
  • Discord
• Flexible Configuration: Environment variables or JSON config file
• Full TypeScript Support: Comprehensive type definitions with Zod validation
• Automatic Retries: Exponential backoff for transient failures (429, 5xx)
• Debug Logging: Set NAPKIN_DEBUG=true for troubleshooting
• Dry-Run Mode: Validate requests without calling the API
• CLI Help: Run with --help for usage information

Prerequisites

• Node.js 18.x or later
• A Napkin AI API key (currently in developer preview - contact api@napkin.ai)

Quick Start

Installation

npm install -g napkin-ai-mcp

Or use directly with npx:

npx napkin-ai-mcp

Get Your API Key

The Napkin AI API is currently in developer preview. To request access:

1. Visit napkin.ai
2. Contact api@napkin.ai for API access

---

Integration Guides

Claude Desktop

Add to your Claude Desktop configuration file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "napkin-ai": {
      "command": "npx",
      "args": ["-y", "napkin-ai-mcp"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key-here"
      }
    }
  }
}

With local storage enabled:

{
  "mcpServers": {
    "napkin-ai": {
      "command": "npx",
      "args": ["-y", "napkin-ai-mcp"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key-here",
        "NAPKIN_STORAGE_TYPE": "local",
        "NAPKIN_STORAGE_LOCAL_DIR": "/Users/yourname/napkin-visuals"
      }
    }
  }
}

After updating the config, restart Claude Desktop.

---

Claude Code (CLI)

Add to your Claude Code MCP settings:

Global config: ~/.claude/settings.json Project config: .claude/settings.json

{
  "mcpServers": {
    "napkin-ai": {
      "command": "npx",
      "args": ["-y", "napkin-ai-mcp"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key-here",
        "NAPKIN_STORAGE_TYPE": "local",
        "NAPKIN_STORAGE_LOCAL_DIR": "./visuals"
      }
    }
  }
}

Or run the CLI command:

claude mcp add napkin-ai -- npx -y napkin-ai-mcp

Then set the environment variable:

export NAPKIN_API_KEY="your-api-key-here"

---

Cursor

Add to your Cursor MCP configuration:

File: ~/.cursor/mcp.json

{
  "mcpServers": {
    "napkin-ai": {
      "command": "npx",
      "args": ["-y", "napkin-ai-mcp"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key-here",
        "NAPKIN_STORAGE_TYPE": "local",
        "NAPKIN_STORAGE_LOCAL_DIR": "./visuals"
      }
    }
  }
}

---

Windsurf

Add to your Windsurf MCP configuration:

File: ~/.windsurf/mcp.json

{
  "mcpServers": {
    "napkin-ai": {
      "command": "npx",
      "args": ["-y", "napkin-ai-mcp"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key-here"
      }
    }
  }
}

---

VS Code with Continue

Add to your Continue configuration:

File: ~/.continue/config.json

{
  "experimental": {
    "modelContextProtocolServers": [
      {
        "transport": {
          "type": "stdio",
          "command": "npx",
          "args": ["-y", "napkin-ai-mcp"],
          "env": {
            "NAPKIN_API_KEY": "your-api-key-here"
          }
        }
      }
    ]
  }
}

---

Cline (VS Code Extension)

Add to your Cline MCP settings in VS Code:

1. Open VS Code settings
2. Search for "Cline MCP"
3. Add the server configuration:

{
  "napkin-ai": {
    "command": "npx",
    "args": ["-y", "napkin-ai-mcp"],
    "env": {
      "NAPKIN_API_KEY": "your-api-key-here"
    }
  }
}

---

Available Tools

Once configured, your AI assistant will have access to these tools:

Tool	Description
generate_visual	Submit a visual generation request (async)
check_status	Check the status of a generation request
download_visual	Download a generated visual as base64
generate_and_wait	Generate and wait for completion
generate_and_save	Generate and save to configured storage
list_styles	Get information about available styles
verify_api_key	Verify your API key is valid and working

Example Prompts

Once configured, try these prompts with your AI assistant:

• "Create a mindmap visualising the key concepts of machine learning"
• "Generate a flowchart showing the user registration process"
• "Make a timeline of major events in the history of computing"
• "Create an infographic comparing REST vs GraphQL APIs"

---

Configuration

Environment Variables

Variable	Description	Required
NAPKIN_API_KEY	Napkin AI API key	Yes
NAPKIN_API_BASE_URL	Custom API base URL	No
NAPKIN_STORAGE_TYPE	Storage type: local, s3, google-drive, slack, notion, telegram, discord	No
NAPKIN_POLLING_INTERVAL	Polling interval in ms (default: 2000)	No
NAPKIN_MAX_WAIT_TIME	Max wait time in ms (default: 300000)	No

Storage Configuration

Local Storage

Save visuals to a local directory:

NAPKIN_STORAGE_TYPE=local
NAPKIN_STORAGE_LOCAL_DIR=./output

Files are saved with the format: napkin-{request_id}-{index}-{color_mode}.{format}

Note for Claude Desktop users: Claude Desktop runs in a sandboxed environment and cannot access local filesystem paths. While files are saved successfully, Claude Desktop cannot display or open them directly. For Claude Desktop, consider using a cloud storage provider (S3, Google Drive, etc.) which returns accessible URLs. Claude Code has full filesystem access and works seamlessly with local storage.

Amazon S3

Save visuals to an S3 bucket (also works with S3-compatible services like MinIO, DigitalOcean Spaces, Cloudflare R2):

NAPKIN_STORAGE_TYPE=s3
NAPKIN_STORAGE_S3_BUCKET=my-bucket
NAPKIN_STORAGE_S3_REGION=eu-west-1
NAPKIN_STORAGE_S3_PREFIX=napkin-visuals/  # Optional path prefix
NAPKIN_STORAGE_S3_ENDPOINT=https://s3.example.com  # Optional, for S3-compatible services
AWS_ACCESS_KEY_ID=your-access-key
AWS_SECRET_ACCESS_KEY=your-secret-key

Required IAM permissions:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": ["s3:PutObject", "s3:GetObject"],
      "Resource": "arn:aws:s3:::my-bucket/napkin-visuals/*"
    }
  ]
}

Google Drive

Save visuals to a Google Drive folder using a service account:

NAPKIN_STORAGE_TYPE=google-drive
NAPKIN_STORAGE_GDRIVE_FOLDER_ID=1ABC...xyz
NAPKIN_STORAGE_GDRIVE_CREDENTIALS=./service-account.json

Setup steps:

1. Go to Google Cloud Console
2. Create a new project or select an existing one
3. Enable the Google Drive API
4. Go to "IAM & Admin" → "Service Accounts" → "Create Service Account"
5. Download the JSON key file and save as service-account.json
6. Share your target Google Drive folder with the service account email (ends with @*.iam.gserviceaccount.com)
7. Get the folder ID from the URL: https://drive.google.com/drive/folders/{FOLDER_ID}

Slack

Upload visuals to a Slack channel:

NAPKIN_STORAGE_TYPE=slack
NAPKIN_STORAGE_SLACK_CHANNEL=C0123456789
NAPKIN_STORAGE_SLACK_TOKEN=xoxb-your-bot-token

Setup steps:

1. Go to Slack API and create a new app
2. Under "OAuth & Permissions", add these Bot Token Scopes:
   • files:write - Upload files
   • chat:write - Post messages (optional)
3. Install the app to your workspace
4. Copy the "Bot User OAuth Token" (starts with xoxb-)
5. Get the channel ID: right-click a channel → "View channel details" → scroll to the bottom

Note: The bot must be invited to the channel with /invite @your-bot-name

Notion

Upload visuals to a Notion page:

NAPKIN_STORAGE_TYPE=notion
NAPKIN_STORAGE_NOTION_TOKEN=secret_abc123...
NAPKIN_STORAGE_NOTION_PAGE_ID=12345678-abcd-1234-abcd-123456789abc
NAPKIN_STORAGE_NOTION_DATABASE_ID=optional-db-id  # Optional

Setup steps:

1. Go to Notion Integrations and create a new integration
2. Copy the "Internal Integration Token" (starts with secret_)
3. Open the target Notion page and click "..." → "Add connections" → select your integration
4. Get the page ID from the URL: https://notion.so/Page-Name-{PAGE_ID} (the 32-character ID at the end)

Note: Notion has file size limits. For large visuals, consider using S3 or Google Drive.

Telegram

Send visuals to a Telegram chat or channel:

NAPKIN_STORAGE_TYPE=telegram
NAPKIN_STORAGE_TELEGRAM_BOT_TOKEN=123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11
NAPKIN_STORAGE_TELEGRAM_CHAT_ID=-1001234567890

Setup steps:

1. Message @BotFather on Telegram and create a new bot with /newbot
2. Copy the bot token (format: 123456789:ABCdefGHIjklMNOpqrsTUVwxyz)
3. Add the bot to your group/channel as an admin (for channels) or member (for groups)
4. Get the chat ID:
   • For groups: Add @userinfobot to the group, it will show the chat ID
   • For channels: Forward a message from the channel to @userinfobot
   • For private chats: Send a message to your bot, then visit https://api.telegram.org/bot<TOKEN>/getUpdates

Note: Channel IDs start with -100, group IDs are negative numbers, user IDs are positive.

Discord

Send visuals to a Discord channel via webhook:

NAPKIN_STORAGE_TYPE=discord
NAPKIN_STORAGE_DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/123456789/abcdef...
NAPKIN_STORAGE_DISCORD_USERNAME=Napkin AI  # Optional

Setup steps:

1. Open Discord and go to the channel where you want to receive visuals
2. Click the gear icon (Edit Channel) → Integrations → Webhooks → New Webhook
3. Give it a name and optionally upload an avatar
4. Click "Copy Webhook URL"

Note: No bot setup required - webhooks are the simplest way to post to Discord.

Default Visual Settings

NAPKIN_DEFAULT_FORMAT=svg       # svg, png, or ppt
NAPKIN_DEFAULT_LANGUAGE=en-GB   # BCP 47 language tag
NAPKIN_DEFAULT_COLOR_MODE=light # light, dark, or both
NAPKIN_DEFAULT_ORIENTATION=auto # auto, horizontal, vertical, or square

JSON Configuration

Create a config.json file:

{
  "napkinApiKey": "your-api-key",
  "storage": {
    "type": "local",
    "directory": "./visuals"
  },
  "defaults": {
    "format": "svg",
    "language": "en-GB",
    "color_mode": "light"
  }
}

---

Tool Parameters

generate_visual / generate_and_wait / generate_and_save

Parameter	Type	Description
content	string	Required. Text content to visualise
format	string	Output format: svg, png, or ppt (default: svg)
dry_run	boolean	Validate request without calling API (default: false)
context	string	Additional context for generation (not shown in visual)
language	string	BCP 47 language tag (e.g., en-GB). Default: en
style_id	string	Napkin AI style identifier. See styles
visual_id	string	Regenerate a specific visual layout with new content
visual_ids	string[]	Array of visual IDs (length must match number_of_visuals)
visual_query	string	Visual type: mindmap, flowchart, timeline, etc.
visual_queries	string[]	Array of visual queries (length must match number_of_visuals)
number_of_visuals	number	Variations to generate (1-4, default: 1)
transparent_background	boolean	Use transparent background (default: false)
color_mode	string	light, dark, or both (default: light)
width	number	Width in pixels (PNG only, 100-10000)
height	number	Height in pixels (PNG only, 100-10000)
orientation	string	auto, horizontal, vertical, or square
text_extraction_mode	string	auto, rewrite, or preserve (default: auto)
sort_strategy	string	relevance or random (default: relevance)

Note: visual_id/visual_ids and visual_query/visual_queries are mutually exclusive.

---

Example Output

Here are some examples of visuals generated using this MCP server. Each example shows the input text and the resulting visual.

Mind Map

Input text:

# Benefits of Visual Communication

## Speed
- Processed 60,000x faster than text
- Instant pattern recognition

## Retention
- 80% of what we see is remembered
- Only 20% of text is retained

## Engagement
- 94% more views than text-only
- Higher social sharing rates

Parameters: format: "svg", visual_query: "mindmap", language: "en-GB"

Flowchart

Input text:

# User Registration Flow

1. User clicks "Sign Up" button
2. Enter email address
3. System validates email format
4. If invalid, show error message
5. If valid, send verification email
6. User clicks verification link
7. Create password
8. Validate password strength
9. If strong, create account
10. Redirect to dashboard

Parameters: format: "svg", visual_query: "flowchart", language: "en-GB"

Timeline

Input text:

# History of Artificial Intelligence

## 1950
Alan Turing publishes "Computing Machinery and Intelligence"

## 1956
The term "Artificial Intelligence" is coined

## 1997
IBM's Deep Blue defeats world chess champion

## 2016
AlphaGo defeats Go world champion Lee Sedol

## 2022
ChatGPT launches, bringing LLMs to the mainstream

Parameters: format: "svg", visual_query: "timeline", language: "en-GB"

See more examples at the Napkin AI Gallery.

---

Visual Query Types

• mindmap - Mind map visualisations
• flowchart - Process flows and diagrams
• timeline - Chronological events
• comparison - Side-by-side comparisons
• hierarchy - Organisational structures
• cycle - Cyclical processes
• list - Bulleted or numbered lists
• matrix - Grid-based comparisons

---

Programmatic Usage

import { NapkinClient, createNapkinMcpServer } from "napkin-ai-mcp";

// Use the client directly
const client = new NapkinClient({
  apiKey: "your-api-key",
});

const result = await client.generateAndWait({
  format: "svg",
  content: "# My Visual\n\n- Point 1\n- Point 2",
  visual_query: "mindmap",
});

// Download the file using the URL from generated_files
if (result.generated_files && result.generated_files.length > 0) {
  const buffer = await client.downloadFile(result.generated_files[0].url);
  // buffer contains the SVG content
}

---

Development

# Clone the repository
git clone https://github.com/LouisChanCLY/napkin-ai-mcp.git
cd napkin-ai-mcp

# Install dependencies
npm install

# Run in development mode
npm run dev

# Run tests
npm test

# Build for production
npm run build

---

Troubleshooting

"NAPKIN_API_KEY is required"

Ensure you've set the NAPKIN_API_KEY environment variable in your MCP configuration.

"Storage not configured"

The generate_and_save tool requires storage configuration. Add one of the storage configurations above.

Visual generation times out

Increase NAPKIN_MAX_WAIT_TIME (default: 300000ms = 5 minutes).

Connection issues

1. Ensure Node.js 18+ is installed
2. Check your API key is valid
3. Verify network connectivity to api.napkin.ai

---

API Reference

• Napkin AI Website
• Visual Gallery - See examples of generated visuals
• API Documentation
• Available Styles
• MCP Specification

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Licence

MIT

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Contributing

Contributions are welcome! Please read our Contributing Guide before submitting pull requests.