How do I install the diagrams mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `RENDERER_HOST`, `FASTMCP_HOST`, `DIAGRAMS_RENDERER_URL`, `BASE_URL` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Diagrams MCP Server

Connect to the public hosted server — no installation required. All rendering engines and dependencies are pre-installed.

Remote serverstreamable-httpPython

What is the Diagrams MCP Server?

Connect to the public hosted server — no installation required. All rendering engines and dependencies are pre-installed.

Credentials and setup notes

Graphviz is required for the default local/in-process rendering mode. Mermaid CLI and PlantUML are optional — install them only if you need those specific rendering engines locally. | Dependency | Required for | Install | |---|---|---| | Graphviz | render_diagram (cloud architecture) | brew install graphviz | | Mermaid CLI

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

How to install the Diagrams MCP Server

{
  "mcpServers": {
    "diagrams-mcp": {
      "url": "https://diagrams-mcp-production.up.railway.app/mcp"
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

Variable	Description	Required
RENDERER_HOST	Endpoint or connection string the server talks to.	Optional
FASTMCP_HOST	Endpoint or connection string the server talks to.	Optional
DIAGRAMS_RENDERER_URL	Endpoint or connection string the server talks to.	Yes
BASE_URL	Endpoint or connection string the server talks to.	Yes

Example prompts to try

“Use Diagrams MCP to Prerequisites.”
“Use Diagrams MCP to Discovery.”
“Use Diagrams MCP to Rendering.”

Frequently asked questions

Connect to the public hosted server — no installation required. All rendering engines and dependencies are pre-installed. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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