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Product Pillars

Official registry AI and agents

Flowcharts that people and agents edit together on one live canvas, exported as Mermaid.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http product-pillars 'https://www.productpillars.com/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "product-pillars": {
            "type": "http",
            "url": "https://www.productpillars.com/api/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Product Pillars for agents
  2. When to use it
  3. Install
  4. What the agent can do
  5. Privacy
  6. Support

Product Pillars for agents

Product Pillars is a canvas for flowcharts that people and AI agents edit together. Your agent draws a user flow, process map or decision tree; you open it on the canvas, move things around, and the agent reads your changes back. Every diagram exports as Mermaid Markdown, so it can live in your repo.

This repo connects agents to it:

  • An Agent Skill (skills/product-pillars) that tells coding agents when a flowchart belongs on the canvas and how to draw one well. Works in Claude Code, Codex, Cursor, Gemini CLI and other agents that read skills.
  • A Claude Code plugin that bundles the skill with the hosted MCP server.
  • server.json, the listing for the official MCP Registry.

The MCP server itself is hosted at https://www.productpillars.com/api/mcp. Nothing here runs locally.

When to use it

Use Product Pillars when someone wants a flowchart they will look at, edit by hand, or share: user flows, onboarding and checkout flows, process maps, approval flows, decision trees. If nobody will ever open the diagram visually, a Mermaid block in a file is enough. It draws flowcharts only.

Install

The skill (any agent)
npx skills add jeremybelcher/product-pillars-agent-kit

The skill tells the agent how to connect if the MCP server isn't set up yet.

The Claude Code plugin (skill plus MCP server)

In Claude Code:

/plugin marketplace add jeremybelcher/product-pillars-agent-kit
/plugin install product-pillars@product-pillars

Then run /mcp, pick product-pillars, choose Authenticate and sign in. If you already added Product Pillars with claude mcp add, remove that entry so you don't have two connections to the same server.

Just the MCP server
ClientHow
Claude (web, desktop, mobile)Settings, Connectors, Add custom connector, paste https://www.productpillars.com/api/mcp
Claude Codeclaude mcp add --transport http product-pillars https://www.productpillars.com/api/mcp
Cursor, VS Code, Codex, Gemini CLIOne-click links and commands at productpillars.com/agents
Scripts and CIAn API key from Settings, sent as Authorization: Bearer mc_live_...

Sign-in is OAuth: you approve access once, and the agent can only do what your account can do. Signing in creates a free account if you don't have one.

What the agent can do

list_diagrams, list_projects, get_diagram, create_diagram (empty, or from a Mermaid flowchart), edit_diagram (batched, conflict-safe edits plus auto layout), lint_diagram, render_diagram, update_diagram and share_diagram. Prompts for clients that show them: draw_flowchart, diagram_from_source, review_diagram.

The full agent guide is at productpillars.com/llms.txt.

Privacy

Connected agents read and write diagrams through your account. Diagram content an agent reads is sent to that agent's provider under their terms. See the Privacy Policy and Terms.

Support

jeremy@jeremybelcher.net

Frequently asked questions

What is Product Pillars?

Flowcharts that people and agents edit together on one live canvas, exported as Mermaid.

How do I install Product Pillars?

It runs as a remote server. In Claude Code: claude mcp add --transport http product-pillars 'https://www.productpillars.com/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Product Pillars need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Product Pillars open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Product Pillars?

It is published by jeremybelcher. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.