Eraser.io
A Python MCP (Model Context Protocol) server and CLI tool to render diagrams using the Eraser API.
What is Eraser.io?
Eraser.io is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to python mcp (model context protocol) server and cli tool to render diagrams using the eraser api.
A Python MCP (Model Context Protocol) server and CLI tool to render diagrams using the Eraser API.
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A Python MCP (Model Context Protocol) server and CLI tool to
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx eraser-ioConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Eraser.io
The Eraser.io MCP server is a Python-based Model Context Protocol server and CLI tool that renders professional diagrams (sequence, flowchart, ER, cloud architecture, and more) by sending diagram descriptions to the Eraser API. It integrates with Claude Desktop, VS Code, and Windsurf, allowing AI assistants to produce visual architecture diagrams, system designs, and data-flow charts on demand with natural language prompts. Developers and architects who use Eraser for documentation can automate diagram creation directly inside their AI coding workflow.
Prerequisites
- Python 3.10 or higher
- An active Eraser account with an API token (ERASER_API_TOKEN) from eraser.io
- pip or uv package manager
- An MCP-compatible client such as Claude Desktop, VS Code with MCP support, or Windsurf
Clone the repository
Download the eraser-io-mcp-server source code.
git clone https://github.com/buck-0x/eraser-io-mcp-server.git
cd eraser-io-mcp-serverInstall Python dependencies
Install the package and its dependencies using pip or uv. The -e flag installs in editable mode so changes take effect immediately.
pip install -e .
# or with uv:
uv pip install -e .Set your Eraser API token
Create a .env file or export the token as an environment variable. The ERASER_API_TOKEN is the only required secret.
cp .env.example .env
# Edit .env:
# ERASER_API_TOKEN=your-eraser-api-tokenTest the server in STDIO mode
Run the MCP server directly to confirm it starts and is ready to accept connections from an MCP client.
python -m eraser_mcpAdd to your MCP client configuration
Register the server in your Claude Desktop or VS Code MCP config file, passing the API token through the env block.
Eraser.io Examples
Client configuration
Claude Desktop configuration for the Eraser.io MCP server using the Python module entry point.
{
"mcpServers": {
"eraser-io": {
"command": "python",
"args": ["-m", "eraser_mcp"],
"env": {
"ERASER_API_TOKEN": "your-eraser-api-token"
}
}
}
}Prompts to try
Example prompts that use the Eraser.io MCP server to generate diagrams from natural language descriptions.
- "Draw a sequence diagram showing the OAuth2 authorization code flow between client, server, and identity provider"
- "Create a cloud architecture diagram for a three-tier web app on AWS with ALB, ECS, and RDS"
- "Generate an ER diagram for a blog database with users, posts, comments, and tags tables"
- "Make a flowchart showing the CI/CD pipeline from git push to production deployment"
- "Produce a dark-themed architecture diagram of a Kafka event streaming system"Troubleshooting Eraser.io
403 or 401 error when rendering a diagram
Verify that ERASER_API_TOKEN is set correctly in your environment or .env file. Log into eraser.io and regenerate the API token if necessary.
Icon validation warnings appear in the output
Set the environment variable SKIP_ICON_CHECK=true to suppress warnings about non-standard icon names used in cloud architecture diagrams.
Server starts but Claude Desktop does not list any tools
Confirm the command in your config points to the correct Python interpreter (use 'which python' or specify the full virtualenv path) and that the package was installed in the same environment.
Frequently Asked Questions about Eraser.io
What is Eraser.io?
Eraser.io is a Model Context Protocol (MCP) server that python mcp (model context protocol) server and cli tool to render diagrams using the eraser api. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Eraser.io?
Follow the installation instructions on the Eraser.io GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Eraser.io?
Eraser.io works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Eraser.io free to use?
Yes, Eraser.io is open source and available under the MIT license. You can use it freely in both personal and commercial projects.
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Set Up Eraser.io in Your Editor
Choose your AI client for step-by-step setup instructions.
Quick Config Preview
Add this to your claude_desktop_config.json or .cursor/mcp.json
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