curl --request GET \
  --url https://api.gemrate.com/v1/certs/{grader}/{cert} \
  --header 'x-api-key: <api-key>'

{
  "data": {
    "grader": "psa",
    "cert": "<string>",
    "gemrate_id": "<string>",
    "universal_gemrate_id": "<string>",
    "spec_id": "<string>",
    "grade_label": "10",
    "description": "<string>",
    "set_url": "<string>",
    "autograph": {
      "graded": true,
      "grade": 5,
      "pop_context": {
        "grade_population": 123,
        "population_higher": 123,
        "total_population": 123
      }
    },
    "population": {
      "total": 123,
      "grades": {
        "9": 50741,
        "mint_plus": 0,
        "gem_mint": 14878,
        "pristine": null
      },
      "by_grader": {},
      "gem_total": 123,
      "gem_rate": 123,
      "last_population_change": "<string>"
    },
    "cross_grader": {
      "grade_population": 123,
      "grade_pct": 123,
      "population_higher": 123,
      "higher_pct": 123,
      "total_population": 123,
      "total_gems_or_greater": 123,
      "gem_rate": 123
    }
  },
  "meta": {
    "request_id": "req_abc123",
    "pagination": {
      "page": 1,
      "page_size": 100,
      "total": 1340,
      "total_pages": 14,
      "next_page": 2
    }
  }
}