0n3
MCP servers · Whimsical · connector · GPT action

Connect ChatGPT to Whimsical

One line gives ChatGPT your Whimsical account as tools: 18 endpoints, workspaces, boards, docs, called with your own connection. No key in the prompt, a receipt for every call, revoke ChatGPT's access alone any time.

Get the line for ChatGPTConnect Whimsical first

Three steps

  1. Create a free 0n3 account and connect Whimsical. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into ChatGPT. A custom connector in Developer mode, or an Action on a custom GPT from the OpenAPI spec.
  3. Ask ChatGPT: whoami. Then: "List workspaces in Whimsical".
Custom connector (needs Developer mode)
  1. Settings → Connectors (or Apps) → Advanced → Developer mode on
  2. Create → name 0n3 · MCP server URL https://0n3.app/mcp · Authentication: OAuth
  3. Finish the sign-in with your 0n account
  4. Enable the connector in a chat and ask: "whoami"

ChatGPT connectors cannot send a static header, so 0n3 signs you in through its OAuth door (dynamic client registration is on).

The line above carries a placeholder; 0n3.app/install mints a real key named for ChatGPT and fills it in.

What ChatGPT can then do in Whimsical

Workspaces · List and view workspaces6
List workspacesGET /workspaces
Get a workspaceGET /workspaces/{workspaceId}
List boardsGET /workspaces/{workspaceId}/boards
Create a boardPOST /workspaces/{workspaceId}/boards
List docsGET /workspaces/{workspaceId}/docs
Create a docPOST /workspaces/{workspaceId}/docs
Boards · Create and manage whiteboards, flowcharts, wireframes6
Get a boardGET /boards/{boardId}
Update a boardPATCH /boards/{boardId}
Delete a boardDELETE /boards/{boardId}
Get a board exportGET /boards/{boardId}/export
Create a from mermaidPOST /boards/from-mermaid
Create a from textPOST /boards/from-text
Docs · Create and manage documents2
Get a docGET /docs/{docId}
Update a docPATCH /docs/{docId}
Users · SCIM user provisioning and management4
List scim usersGET /scim-v2/Users
Create a scim userPOST /scim-v2/Users
Update a scim userPUT /scim-v2/Users/{userId}
Deactivate scim userPATCH /scim-v2/Users/{userId}
Mind maps · Create and manage mind maps0
Create and manage mind maps
Generate diagrams · AI-powered diagram generation from text or Mermaid markup0
AI-powered diagram generation from text or Mermaid markup

Whimsical in other AI clients

Claude Code + WhimsicalMCP server + skillClaude (desktop & claude.ai) + WhimsicalconnectorCodex CLI + WhimsicalMCP serverGemini CLI + WhimsicalMCP serverCursor + WhimsicalMCP serverVS Code (Copilot) + WhimsicalMCP serverWindsurf + WhimsicalMCP server

ChatGPT with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints