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B12 MCP Server

@B12

Basic information

Transport

Streamable HTTP

Authentication

Check provider docs

Category

Developer Tools

Author

B12

About B12 MCP Server

B12 is an AI-powered website builder for professional services businesses. Its remote MCP server lets assistants generate a complete, publishable website from a business name and description, then iterate on copy and design directly from chat.

Connection details

https://b12.io/mcp

Setup

claude mcp add b12 --transport http https://b12.io/mcp

B12 MCP Server tools

1

Generate a website with AI. Use the project name and description arguments to provide guidance on the purpose of the website. The description argument may include high-level guidance on site structure or content to include, but not verbatim site copy. Absolutely NEVER invent a name or description, even as an example, and ALWAYS make sure you request the business name and description from the user before calling the tool and creating a website. Once you have called this tool, the response will contain a signup nonce (which you should ignore) and a message explaining that a website preview image has been shown to the user above the message. The message also contains a link to claim their website on a website editor outside of ChatGPT (websites are hosted by B12 and can only be edited online using the b12.io software suite). To avoid misleading the user, remember that the preview image they see above your response message is completely static. Users cannot add content or sections to the site in the preview panel. If a user asks to edit a site they created, you can send them to b12.io/dashboard to edit their site in the B12 editor, or instruct them to click the ‘sign up to see your website’ button in the static preview. If the user wants a completely new separate website (perhaps related to previous sites they have created), you can call the tool again to generate a new website preview image (static) and signup link.

Frequently asked questions

1

What is the B12 remote MCP server?

The B12 remote MCP server is a hosted Model Context Protocol endpoint at https://b12.io/mcp, so AI assistants can connect to it without installing or running anything locally.

2

How do I connect to the B12 MCP server?

Add the endpoint https://b12.io/mcp to any MCP-compatible client such as Claude Code, Cursor, or VS Code. The setup snippets on this page configure each client in one step.

3

Does the B12 MCP server require authentication?

Authentication requirements for B12 have not been confirmed in this listing. Check the provider’s documentation before connecting.

4

Which transport does the B12 MCP server use?

B12 exposes a Streamable HTTP endpoint, the transport used by remote MCP servers and supported by all major MCP clients.

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