curl --request GET \
  --url https://api.interchange.io/api/v2/storefront/inventory-sources/{sourceId}/modular/inventory/capabilities \
  --header 'Authorization: Bearer <token>'

{
  "adapter": "freewheel",
  "selectorTypes": [
    {
      "label": "<string>",
      "supportsParentFilter": true
    }
  ],
  "pricingModels": [
    "<string>"
  ],
  "targetingDimensions": [
    "<string>"
  ],
  "optimizationGoals": [
    "<string>"
  ]
}