curl --request GET \
  --url https://www.fetchserp.com/api/v1/keywords_search_volume \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "search_volume": [
      {
        "keyword": "<string>",
        "avg_monthly_searches": 123,
        "competition": "<string>",
        "competition_index": 123,
        "low_top_of_page_bid_micros": 123,
        "high_top_of_page_bid_micros": 123,
        "monthly_search_volumes": [
          {
            "year": 123,
            "month": "<string>",
            "monthly_searches": 123
          }
        ]
      }
    ]
  }
}