Ping
Basic no-charge liveness check.
GET https://alpha-swan.duckdns.org/v1/free/ping
Controlled Test Website
This site tests one boundary: free API calls should work without Stripe, while paid API calls should only work after a sandbox purchase has provisioned an API key.
These are the baseline checks. If they work from an approved operator IP and fail from elsewhere, the access boundary is behaving as intended.
Basic no-charge liveness check.
GET https://alpha-swan.duckdns.org/v1/free/ping
Return current UTC time and a Unix epoch value.
GET https://alpha-swan.duckdns.org/v1/free/time/utc
These exist only to validate key provisioning. They stay simple so billing behavior remains the thing under test.
Normalize whitespace and trim edges in a string.
POST https://alpha-swan.duckdns.org/v1/tools/text/cleanup
Move a timestamp by a chosen number of minutes.
POST https://alpha-swan.duckdns.org/v1/tools/time/shift
Start with the free routes. Use the paid routes only when you want to verify the Stripe sandbox purchase and key-provisioning path.
curl https://alpha-swan.duckdns.org/v1/free/ping
curl https://alpha-swan.duckdns.org/v1/free/time/utc
curl -X POST https://alpha-swan.duckdns.org/v1/tools/text/cleanup \
-H "Content-Type: application/json" \
-H "X-API-Key: rk_live_your_key_here" \
-d '{"text":" keep this tidy "}'
The full machine-readable contract is available in the OpenAPI reference linked above.
Use this only for Stripe sandbox testing. It creates a Checkout Session for the test product and returns you here with a provisioned API key if payment succeeds.
This page uses Stripe sandbox only. No real payment should occur here.