# Constraints — Shopify

| key | value | condition | source | checked |
|---|---|---|---|---|
| ads_allowed | yes |  | https://www.shopify.com/legal/terms | 2026-04-18 |
| api_available | yes |  | https://www.shopify.com/legal/terms | 2026-04-18 |
| checkout_customization_available | conditional | Basic editor on all plans; full Checkout Extensibility requires Shopify Plus. | https://shopify.dev/docs/api/checkout-ui-extensions | 2026-04-18 |
| custom_domain_available | yes |  | https://www.shopify.com/pricing | 2026-04-18 |
| webhook_available | yes |  | https://www.shopify.com/legal/terms | 2026-04-18 |

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