A2ui Validate MCP tool

MCP findutils: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 line numbers. Call this on every LLM-generated payload before sending to the client.

Needs an API key. Running a tool needs an API key. Keys are not for sale yet: ask for early access. About API keys

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Arguments

application/json

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

Example arguments

Verified

{
  "payload": {
    "version": "v0.9",
    "createSurface": {
      "surfaceId": "s",
      "catalogId": "x"
    }
  }
}

claude mcp add findutils --transport http https://mcp.findutils.com/ --header "Authorization: Bearer YOUR_API_KEY"

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

curl -X POST https://mcp.findutils.com/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "a2ui_validate",
      "arguments": {
        "payload": "{\"version\":\"v0.9\",\"createSurface\":{\"surfaceId\":\"s\",\"catalogId\":\"x\"}}"
      }
    }
  }'

Rate limit: 120 a minute, per IP
Auth: API key
MCP name: a2ui_validate
Category: Developer
Machine-readable: openapi.json · markdown.md

Arguments

Example arguments

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