{"uid":"cap_Ebkr2W16MNrdxcGRQF4tP","slug":"stablemerch-ucp-checkout-complete-4e148b04","name":"StableMerch UCP Checkout Complete","description":"Pay for a StableMerch UCP checkout session and send its prepared Printify order to production. Requires checkout status ready_for_complete.","url":"https://stable-merch-git-rfs-checkout-nites-merit-systems.vercel.app/api/ucp/checkout-sessions/stablemerch%3Acheckout%3Acmqirn2mj0000kz04468v0vks/complete?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"id":{"type":"string","minLength":1,"description":"UCP checkout session ID being completed. AgentCash clients may instead send checkout_session_id."},"payment":{},"checkout_session_id":{"type":"string","minLength":1,"description":"AgentCash checkout session ID being completed. UCP clients may instead send id."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"50","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$50/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"50","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"50","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ax5SWSu5683hk05YYkw-r","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"50","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Completes a StableMerch UCP checkout session by processing payment and sending the prepared Printify print order to production.","exampleAgentPrompt":"Complete and pay for my StableMerch checkout session cmqirn2mj0000kz04468v0vks — it's ready to go, so submit the Printify order to production now.","exampleUseCases":[{"title":"Automated merch order fulfillment","prompt":"My StableMerch checkout session is ready — go ahead and pay for it and push the Printify order to production. The session ID is stablemerch:checkout:cmqirn2mj0000kz04468v0vks."},{"title":"Agent-driven custom merchandise purchase","prompt":"I've finished setting up my custom t-shirt order in StableMerch and the checkout session is in ready_for_complete status. Can you complete the payment and send it off to be printed?"},{"title":"Programmatic print-on-demand order submission","prompt":"Submit and pay for the prepared Printify order tied to my StableMerch UCP checkout session — the session ID is stablemerch:checkout:cmqirn2mj0000kz04468v0vks and I want it sent to production immediately."}],"resultDescription":"Returns confirmation that the UCP checkout session has been paid and the associated Printify order has been sent to production, including updated checkout session status and order details.","failureModes":["Checkout session not in ready_for_complete status — returns error requiring session to be prepared first","Invalid or missing session ID — returns validation error","Payment failure or insufficient USDC — returns payment error","Session ID not found — returns 404 or not-found error","Duplicate completion attempt on already-completed session — returns conflict error"],"whenToPreferThis":"Use this endpoint when you have a StableMerch UCP checkout session that has been fully prepared and is in ready_for_complete status, and you want to pay for it and trigger production of the Printify order in a single call. This is the final step in the StableMerch order flow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T01:05:26.671Z","isFirstParty":false,"canonicalSlug":"stablemerch-ucp-checkout-complete-4e148b04"}