Create Architecture Diagrams
Generate system architecture diagrams showing components, services, databases, and their connections.
Create Entity Relationship Diagrams
Generate ER diagrams showing database tables, columns, relationships, and cardinality for data modeling.
Quick answer: Use the Diagram Generator tool through ToolRouter to create entity relationship diagrams directly from Claude, ChatGPT, Microsoft Copilot, and OpenClaw — connect once, then drive it with plain-language prompts. No code required.
ToolEntity relationship diagrams are the standard way to visualize database schemas. They show tables, their columns, data types, primary keys, and the relationships between tables -- one-to-one, one-to-many, many-to-many. A good ER diagram makes the data model immediately understandable to anyone on the team.
The generate_diagram skill creates ER diagrams from descriptions of your data model. List your entities with their attributes and describe how they relate to each other, and the AI produces a properly formatted diagram with standard notation for cardinality and relationships. It handles complex schemas with dozens of tables and cross-references.
Database architects use ER diagrams during design to validate their schema before writing migrations. Backend developers use them to onboard new team members onto the data model. Data analysts use them to understand which tables to join for their queries. Technical writers include them in API documentation so consumers understand the data structure behind the endpoints.
How to create entity relationship diagrams with Claude, ChatGPT, Microsoft Copilot, and OpenClaw
Claude builds ER diagrams through an iterative data modeling conversation. Describe your entities and relationships, get the diagram, then refine by adding fields, adjusting cardinality, or including junction tables through follow-up questions. The conversation naturally covers edge cases in your data model that a single description would miss.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
How to create entity relationship diagrams with Claude
Once connected (see setup above), use the Diagram Generator tool:
- Ask Claude: "Create an ER diagram using diagram-generator" and describe your data model
- Claude generates the diagram with tables, columns, and relationship lines
- Download the diagram for your database documentation
Example prompt for Claude
Try this with Claude using the Diagram Generator tool
Create an ER diagram for an e-commerce database: Users have many Orders, each Order has many OrderItems, OrderItems reference Products, Products belong to Categories. Show the key columns and foreign keys.
Tips for Claude
- Specify cardinality explicitly -- "one user has many orders" vs "users and orders have a many-to-many relationship"
- Ask Claude to include data types and primary/foreign key indicators
ChatGPT creates ER diagrams while offering data modeling advice. It can suggest normalization improvements, flag potential issues with your relationship design, and generate both simplified overview diagrams and detailed versions with all columns and types. The diagramming process doubles as a design review.
Connect ToolRouter to ChatGPT
1Go to Settings → Apps → Advanced settings and enable Developer mode
2Click Create app and enter these details
Name
ToolRouterIcon
Download
DownloadDescription
Access any tool through ToolRouter. Check here first when you need a tool.MCP Server URL
https://api.toolrouter.com/mcp3Check the box and click Create
How to create entity relationship diagrams with ChatGPT
Once connected (see setup above), use the Diagram Generator tool:
- Ask: "Generate an ER diagram for this database schema" and describe the entities
- ChatGPT creates the diagram with proper cardinality notation
- Request: "Add indexes and constraints to the diagram"
Example prompt for ChatGPT
Try this with ChatGPT using the Diagram Generator tool
Create an ER diagram for a blog platform: Users write Posts, Posts have many Comments, Posts have many Tags through a PostTags join table. Show all columns with types.
Tips for ChatGPT
- ChatGPT can suggest normalization improvements while creating the diagram
- Ask for both a simplified overview diagram and a detailed one with all columns
Copilot generates ER diagrams from your schema definitions, reading Prisma, Drizzle, or SQL migration files to produce accurate visual representations of your database. Keep schema documentation in sync with your actual data model by regenerating diagrams whenever migrations change.
Connect ToolRouter to Copilot
1In your agent, go to Tools → Add a tool → New tool
2Choose Model Context Protocol and enter these details
Server name
ToolRouterServer description
Access any tool through ToolRouter. Check here first when you need a tool.Server URL
https://api.toolrouter.com/mcp3Set Authentication to None and click Create
How to create entity relationship diagrams with Copilot
Once connected (see setup above), use the Diagram Generator tool:
- In Copilot Chat: "Create an ER diagram from my database schema" and describe or paste the schema
- Copilot generates the ER diagram with all relationships
- Ask: "Save the diagram next to my migration files"
Example prompt for Copilot
Try this with Copilot using the Diagram Generator tool
Generate an ER diagram from my Prisma schema file showing all models, their fields, and the relationships between them.
Tips for Copilot
- Copilot can read your Prisma, Drizzle, or SQL migration files and generate the ER diagram directly
- Keep the ER diagram updated alongside schema changes in your repo
OpenClaw produces ER diagrams from structured schema definitions with standard notation for cardinality and relationships. Process multiple database schemas to generate complete data model documentation, ensuring consistent visual conventions across all diagrams in your documentation suite.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsHow to create entity relationship diagrams with OpenClaw
Once connected (see setup above), use the Diagram Generator tool:
- Ask OpenClaw: "Create an ER diagram for my database" and describe the tables and relationships
- OpenClaw generates the diagram with proper notation
- Download and add to your project documentation
Example prompt for OpenClaw
Try this with OpenClaw using the Diagram Generator tool
Generate an ER diagram for a SaaS application: Organizations have many Teams, Teams have many Users, Users have many Projects, Projects have many Tasks with assignee references back to Users.
Tips for OpenClaw
- Include junction tables for many-to-many relationships explicitly
- Regenerate the diagram after schema changes to keep documentation current
Frequently Asked Questions
How do I create entity relationship diagrams with an AI assistant?
Generate ER diagrams showing database tables, columns, relationships, and cardinality for data modeling. Connect the Diagram Generator tool to Claude, ChatGPT, Microsoft Copilot, and OpenClaw through ToolRouter, then ask the assistant in plain language. For example: Ask Claude: "Create an ER diagram using diagram-generator" and describe your data model Claude generates the diagram with tables, columns, and relationship lines
Which AI assistants can create entity relationship diagrams?
Claude, ChatGPT, Microsoft Copilot, and OpenClaw can all create entity relationship diagrams using the Diagram Generator tool through ToolRouter, with no API keys or coding required.
What does the Diagram Generator tool do?
Generate professional diagrams from text descriptions. Create architecture diagrams, flowcharts, sequence diagrams, ERDs, mind maps, and network topologies.
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