A2ui Prompt

Developer MCP

Generates a drop-in LLM system prompt that teaches the model to output valid A2UI JSONL: includes the basic-catalog component / function list, the hard rules (one root, IDs not inline, paths start with "/"), and the requested few-shot examples. Feed the returned string straight into your chat-completion call's system role.

This page documents the MCP tool findutils:a2ui_prompt.

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Call it over MCP

Tool name findutils:a2ui_prompt · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "a2ui_prompt",
      "arguments": {}
    }
  }'

Input schema

Fetch this tool's machine-readable schema from GET https://api.findutils.com/api/tools/, or call tools/list on the MCP server.

Example arguments (verified)

{}

More Developer tools

A2ui Basic Catalog

Returns the authoritative basic-catalog JSON Schema (components, functions, theme) for the requested A2UI version.

A2ui Diff

Computes a structural diff between two A2UI JSONL payloads: surfaces added/removed, components added/removed/changed (by id), data-model pat

A2ui Examples

Returns one or more canonical A2UI JSONL examples matching a pattern (form, list, wizard, modal, chat, dashboard, checkout, typeahead, mcp-c

A2ui Spec

Returns A2UI protocol documentation for a given spec version and section.

A2ui Validate

Validates a JSONL A2UI payload against the basic catalog (or a custom catalog) and returns any errors, warnings, or info messages with exact

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Aspect Ratio

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Color Contrast

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