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StableMerch Checkout Session Complete
x402
StableMerch Checkout Session Complete is a paid API for AI agents from stable-merch-git-rfs-checkout-nites-merit-systems.vercel.app, paid per call via x402, $50/call, status unknown (last checked 2026-10-21).
Completes a StableMerch UCP checkout session by processing payment and submitting the prepared Printify order to production.
Price / call$50
Success—
StatusUnknown
How this service works
Pay for a StableMerch UCP checkout session and send its prepared Printify order to production. Requires checkout status ready_for_complete.
Output
On success, returns confirmation that the checkout session has been completed, payment processed (50 USDC), and the Printify order has been sent to production for fulfillment.
Example use cases
Automated merch order fulfillment
“My StableMerch checkout session stablemerch:checkout:cmqiprmxe0000l504csr8ttju is ready — please complete it, process the $50 payment, and send the Printify order to production.”
Agent-driven drop shipping checkout
“I've set up a custom merch checkout session on StableMerch and it shows status ready_for_complete. Can you finalize it and get the order into production with Printify? The session ID is stablemerch:checkout:cmqiprmxe0000l504csr8ttju.”
Programmatic merchandise print order submission
“Complete my StableMerch UCP checkout session ID stablemerch:checkout:cmqiprmxe0000l504csr8ttju and submit the Printify order — I'm ready to pay now.”
Technical details
Endpoint
POSThttps://stable-merch-git-rfs-checkout-nites-merit-systems.vercel.app/api/ucp/checkout-sessions/stablemerch%3Acheckout%3Acmqiprmxe0000l504csr8ttju/complete?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have an existing StableMerch UCP checkout session in the ready_for_complete state and need to finalize payment and push the prepared Printify order to production. This is specifically for the StableMerch/UCP platform rather than direct Printify API calls or other print-on-demand services.
Side effects
- Checkout session not in ready_for_complete status — order not yet prepared
- Invalid or missing checkout session ID — returns 400/422 error
- Payment failure or insufficient USDC balance — transaction not processed
- Session already completed — idempotency violation
- Printify production submission failure — order not forwarded
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | string | UCP checkout session ID being completed. AgentCash clients may instead send checkout_session_id. |
| payment | — | |
| checkout_session_id | string | AgentCash checkout session ID being completed. UCP clients may instead send id. |
Tags
x402
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