shopify storefront api cart create error headless

The actual problem

Headless carts fail to create/checkout while the theme store still works, so custom landings waste ads.

Do this

1. Log Storefront API errors on cartCreate / checkoutCreate for 24h.
2. Confirm storefront access token scopes and buyer IP throttling.
3. Fall back to hosted /cart checkout link when API cart fails.
4. Don’t scale headless landings until create→checkout success >99%.

Tools for this job

• Tillkiln

  Theme checkout traps if you fall back to hosted

• Cashkiln checklist

  Pre-scale checks

Related intents

• shopify cart drawer checkout button not working
• shopify checkout loses utm attribution