重複コンテンツチェッカーAPI

{
  "status": "ok",
  "pairs": [
    { "a": "https://example.com/a", "b": "https://example.com/b", "similarity": 0.91, "containment": 0.96, "near_duplicate": true, "canonicalized": false }
  ],
  "clusters": [["https://example.com/a", "https://example.com/b"]],
  "duplicates": {
    "titles": [{ "value": "trail running shoes", "urls": ["https://example.com/a", "https://example.com/b"] }],
    "meta_descriptions": [],
    "h1": []
  }
}