Create Checkout

curl --request POST \
  --url https://api.example.com/v1/checkout \
  --header 'Content-Type: application/json' \
  --data '
{
  "skill_slug": "<string>",
  "success_url": "https://agentpowers.ai/purchase/success",
  "cancel_url": "https://agentpowers.ai/purchase/cancel"
}
'

{
  "purchase_id": "<string>",
  "checkout_url": "<string>",
  "status": "<string>"
}