curl --request GET \
  --url https://api.halal.sh/v1/methodologies/{id} \
  --header 'X-API-Key: <api-key>'

{
  "data": {
    "id": "aaoifi-ss21",
    "name": "AAOIFI Shariah Standard No. 21",
    "short_name": "AAOIFI SS21",
    "version": "2024",
    "description": "<string>",
    "calculation_basis": "market_capitalization",
    "screens": [
      {
        "name": "Interest-Bearing Debt",
        "type": "qualitative",
        "metric": "interest_bearing_debt_to_market_cap",
        "threshold": 0.3,
        "operator": "less_than",
        "description": "<string>"
      }
    ],
    "purification_method": "dividend_purification",
    "purification_description": "<string>"
  },
  "meta": {
    "request_id": "req_abc123",
    "methodology": "aaoifi-ss21@2024",
    "as_of": "2026-03-08T12:00:00Z",
    "retry_after": 120
  }
}