curl --location --request POST '/api/v1/subscriptions/checkout-sessions' \
--header 'Authorization: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"priceUid": "string",
"billingMode": "FIXED",
"expectedUsage": {
"amount": 0,
"currency": "string"
},
"strategy": "moderate",
"customMultiplier": 1,
"customer": {
"email": "user@example.com",
"firstName": "string",
"lastName": "string"
},
"successUrl": "http://example.com",
"cancelUrl": "http://example.com",
"metadata": {}
}'{
"checkoutSession": {
"uid": "string",
"approval_url": "string"
},
"subscription": {
"uid": "string"
},
"customer": {
"uid": "string"
}
}