{"uid":"cap_p9DL6C0OqchH8ThdgPjMC","slug":"x402-shizu-me-webhook-inbox-async-callback-bucket-520b584c","name":"x402.shizu.me Webhook Inbox (Async Callback Bucket)","description":"A durable inbound URL for agents that can't host a server. POST {ttl?} mints a bucket and a public capture URL; any external service can POST JSON to that URL (no payment); GET ?token= drains the queued deliveries. Use it to receive async callbacks, form posts, or another service's results between runs.","url":"https://x402.shizu.me/webhook","method":"GET","headers":{},"bodySchema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"type":"object","required":["method"],"properties":{"method":{"const":"GET"},"queryParams":{"type":"object","required":["token"],"properties":{"token":{"type":"string"}}}}}}},"responseSchema":{"type":"json","example":{"poll":"GET /webhook?token=AbC123…","token":"AbC123…","expires":1784303600,"capture_url":"https://x402.shizu.me/wh/AbC123…"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YHSGl85ymnIVmx_Bp2XcX","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Mints a durable public capture URL for receiving async callbacks, form posts, or service results, then drains queued deliveries on demand — no server required.","exampleAgentPrompt":"Create a temporary webhook bucket for me with a 10-minute TTL so I can receive the callback from Stripe after the payment completes, then poll it to drain whatever JSON payloads arrived.","exampleUseCases":null,"resultDescription":"On POST (mint): returns a bucket ID and a public capture URL that third parties can POST JSON to. On GET with ?token=: returns an array of all queued delivery payloads that were posted to the capture URL since the bucket was created or last drained, clearing the queue.","failureModes":["Expired TTL — bucket no longer exists, GET returns empty or 404","Invalid or missing token on GET — unauthorized, deliveries not returned","Empty queue — no deliveries have arrived yet, returns empty array","Bucket never created before attempting to drain — token not found","External service posts malformed JSON — payload may be stored as-is or rejected"],"whenToPreferThis":"Use this endpoint when an AI agent needs to receive asynchronous HTTP callbacks, webhooks, or form posts from external services but cannot host its own server. Ideal for multi-step agent workflows where a third-party service needs to call back with results between agent execution runs. Prefer over polling external APIs directly when you need a push-based delivery model with no infrastructure setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:55:43.396Z","isFirstParty":false}