A2ui Diff MCP tool

MCP findutils:a2ui_diff

Computes a structural diff between two A2UI JSONL payloads: surfaces added/removed, components added/removed/changed (by id), data-model path-level changes. Use this to understand what an agent turn changed in a surface, or to verify that a refactor kept behaviour identical.

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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

{
  "before": {
    "version": "v0.9",
    "createSurface": {
      "surfaceId": "s",
      "catalogId": "x"
    }
  },
  "after": "{\"version\":\"v0.9\",\"createSurface\":{\"surfaceId\":\"s\",\"catalogId\":\"x\"}}\n{\"version\":\"v0.9\",\"surfaceUpdate\":{\"surfaceId\":\"s\",\"components\":[],\"root\":\"\"}}"
}

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

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

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "a2ui_diff",
      "arguments": {
        "before": "{\"version\":\"v0.9\",\"createSurface\":{\"surfaceId\":\"s\",\"catalogId\":\"x\"}}",
        "after": "{\"version\":\"v0.9\",\"createSurface\":{\"surfaceId\":\"s\",\"catalogId\":\"x\"}}\n{\"version\":\"v0.9\",\"surfaceUpdate\":{\"surfaceId\":\"s\",\"components\":[],\"root\":\"\"}}"
      }
    }
  }'

Rate limit: 120 a minute, per IP
Auth: None
MCP name: a2ui_diff
Category: Developer
Machine-readable: openapi.json · markdown.md

Arguments

Example arguments

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