curl --request GET \
  --url https://macrobymark.com/api/indicators/{slug}/export-bundle \
  --header 'X-API-Key: <api-key>'

{
  "schema": "macrobymark/export-bundle/v1",
  "metadata": {},
  "observations": [
    {
      "date": "2023-12-25",
      "value": 123,
      "revised": true
    }
  ],
  "citations": {
    "apa": "<string>",
    "bibtex": "<string>",
    "inline": "<string>",
    "json": "<string>"
  },
  "attribution": {}
}