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Concept Builder

YouTube Thumbnail Designer

AI agent · Thumbnail Concept Collaborator

Three or four thumbnail options for one video, a vertical Shorts cover and a channel banner to match, with your presenter looking the same in every one.

Chat All Concept Builders

Start the conversation.

Open a board with YouTube Thumbnail Designer and send one of these as your first message.

I've got a new video — let's build its thumbnail options together
Pin our presenter so they look the same in every thumbnail
Turn my best thumbnail into a matching vertical Shorts cover
Let's design a channel banner that fits our thumbnail style
Help me find the one hook this video's thumbnail should sell

Get started

Build your concept on the board.

Chat with YouTube Thumbnail Designer All Concept Builders

Included on Plus and MaxPublish for everyone

New to MockFlow

Sign up free, open a board and chat with any public Concept Builder.

Brainstorm with MockFlow MCP

Add MockFlow as an MCP connector in Claude, Cursor, or any MCP-compatible AI assistant to generate flowcharts, mindmaps, architecture diagrams, and 16 types of visualizations.

Desktop App MCP Powerful

CLI Web MCP Developer

Web MCP Easiest

Built into the MockFlow Desktop App. AI creates visuals directly on your open canvas — no URLs, no waiting.

1

Open Desktop App → open a MockFlow project

2

In Claude Code / Cursor, run:
claude mcp add --transport http -s user mockflow-ideaboard http://localhost:21193/mcp

3

Ask: "Create a flowchart for..."

Best for: Designers, product teams, daily MockFlow users.

Download Desktop App →

Install from npm, log in via browser (OAuth), and boards are saved to your MockFlow account.

1

npm install -g @mockflow/ideaboard-mcp

2

mockflow-ideaboard-mcp login

3

mockflow-ideaboard-mcp

Best for: Developers using Claude Code, Cursor, or VS Code Copilot.

npm Package →

Add MockFlow as a connector in Claude.ai or ChatGPT. No installation. A new board is created and you get a shareable URL.

1

Open Claude.ai → Settings → Connectors

2

Paste this URL, then click Connect and sign in to MockFlow: https://app.mockflow.com/ideaboard/connector/mcp

3

Ask Claude to create a flowchart — done!

ChatGPT or no account: no login needed, use https://app.mockflow.com/ideaboard/mcp

Best for: Managers, marketers, anyone using Claude.ai or ChatGPT in the browser.

Learn more about MockFlow MCP → Agent Skills for MCP

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