Datadef MCP MCP server

An official MCP server provided by Datadef that enables AI agents to generate, edit, and export architecture, ERD, and cloud diagrams. It supports creating diagrams from prompts or code (SQL, Terraform, Prisma), editing nodes, exporting images, and syncing with repositories to keep documentation current.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Datadef

MCP endpoint (Streamable HTTP)

https://datadef.io/mcp

Vendor documentation

What you can do with it

Generate architecture diagrams from plain English descriptions or code snippets
Edit diagram nodes and edges programmatically via agent tool calls
Export diagrams as PNG or JPEG images for documentation
Sync diagrams with GitHub/GitLab repositories to maintain accuracy

Tools advertised by the last live check:

get_design_guide
canvas_describe_canvas
canvas_inspect_nodes
canvas_search_icons
canvas_measure_canvas
canvas_add_nodes
canvas_add_standalone_node
canvas_update_nodes
canvas_replace_node
canvas_remove_nodes
canvas_connect_nodes
canvas_update_edges
canvas_disconnect_nodes
canvas_set_columns
canvas_group_nodes
canvas_move_to_group
canvas_add_lineage
canvas_remove_lineage
canvas_add_text
canvas_add_shape
canvas_add_flow_arrow
canvas_add_region
canvas_suggest_simplifications
canvas_collapse_nodes
canvas_move_nodes
canvas_resize_nodes
canvas_align_nodes
canvas_layout_canvas
canvas_validate_canvas
canvas_view
canvas_batch
create_diagram
create_blank_diagram
list_diagrams
get_diagram
edit_diagram
export_diagram
repo_status
repo_refresh

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http datadef-mcp https://datadef.io/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add datadef-mcp --url https://datadef.io/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable datadef-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "datadef-mcp": {
      "url": "https://datadef.io/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "datadef-mcp": {
      "type": "streamableHttp",
      "url": "https://datadef.io/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start datadef-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "datadef-mcp": {
      "type": "http",
      "url": "https://datadef.io/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http datadef-mcp https://datadef.io/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "datadef-mcp": {
      "url": "https://datadef.io/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "datadef-mcp": {
      "serverUrl": "https://datadef.io/mcp"
    }
  }
}

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