Flowsimp

Flowsimp is a hosted MCP server for flowcharts. Send it Mermaid flowchart syntax or a simple indented outline and it returns a read-only share link and an editable link that opens the diagram in the Flowsimp editor at flowsimp.com. Completely free to use, no sign-up or API key. Remote Streamable HTTP endpoint, no auth: https://flowsimp.com/mcp

View on flowsimp.com

Hosted MCP Server

npx add-mcp 'https://flowsimp.com/mcp'

Installs into Claude Code, Codex, Cursor and more

Documentation

Server URL

Streamable HTTP: https://flowsimp.com/mcp. The same create action is also POST https://flowsimp.com/api/flowchart with JSON { "text": "flowchart TD\n A[Start] --> B[Next]" }. An OpenAPI description is at /openapi.json.

Open this template

Add it to a chat app

  • Cursor: add a remote MCP server with the URL above. No headers are required.
  • Claude: use a custom connector and paste https://flowsimp.com/mcp when the app asks for a remote MCP URL.
  • ChatGPT: add a GPT Action from /openapi.json, or an MCP connector if your workspace supports remote MCP. Point it at the same host.

Tools

  • create_flowchart — Mermaid text or an indented outline, optional title and mode (flowchart or network).
  • list_templates — swimlane, decision tree, user flow, org chart, flowchart, process, network, and mind map, each with an editor link.