Petal Components MCP MCP server

An official MCP server provided by Petal for the petal_components Phoenix LiveView library. It exposes introspected schemas for 213 UI components, allowing AI coding assistants to retrieve accurate attributes, slots, defaults, and enums. This enables agents to generate correct HEEx markup without inventing Tailwind classes or guessing component interfaces.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Petal

MCP endpoint (Streamable HTTP)

https://mcp.petal.build/mcp

Vendor documentation

What you can do with it

Retrieve full schema for a specific component including attributes and slots
List all available components in the petal_components library
Get installation instructions for integrating the library into a Phoenix project

Tools advertised by the last live check:

get_install_instructions
list_components
get_component

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http petal-components-mcp https://mcp.petal.build/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add petal-components-mcp --url https://mcp.petal.build/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable petal-components-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "petal-components-mcp": {
      "url": "https://mcp.petal.build/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "petal-components-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.petal.build/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start petal-components-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "petal-components-mcp": {
      "type": "http",
      "url": "https://mcp.petal.build/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http petal-components-mcp https://mcp.petal.build/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "petal-components-mcp": {
      "url": "https://mcp.petal.build/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "petal-components-mcp": {
      "serverUrl": "https://mcp.petal.build/mcp"
    }
  }
}

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