{"uid":"cap_sEQl6odCedrhv2Oq8lgPf","slug":"kenward-buyer-activity-lookup-api-x402-0cb70f4b","name":"Kenward Buyer Activity Lookup API (x402)","description":"Pay-per-call data settled in USDC on Base. No account, no API key, no human in the loop. Measured 2026-10-05: p50 89-105 ms end-to-end over the public internet; our own handling cost is reported per response in the X-Kenward-Serve-Ms header. Safe by construction: the server holds no private key (/health reports holds_keys=false), a signed payment is delivered once, and an unmeasured market answers UNKNOWN instead of a guess. Launch price: 0.025 USD (50% off 0.05) for the first 100 unique paying wallets (excluding the operator's own wallet).","url":"https://pay.kenwardai.my.id/v1/buyer?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"job_id":{"type":"string","description":"poster/job id"},"market":{"type":"string","description":"marketplace id, e.g. dealwork"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"as_of":"2026-09-14","buyer":{"ever_paid":false,"payments_observed":0},"job_id":"12345","market":"dealwork","boundary":"snapshot-derived"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xKHhdSlr1gBNH1-riywu0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns payment activity and buyer history for a given job/poster ID on a marketplace, paid per call in USDC on Base via x402.","exampleAgentPrompt":"Check whether the buyer for job ID 12345 on the dealwork marketplace has ever made a payment — I want to know their payment count and whether they've paid before.","exampleUseCases":[{"title":"Verify buyer before engaging","prompt":"Before I respond to this job posting, can you check if the poster with job ID 98765 on dealwork has ever actually paid anyone? I want to see their payment count and whether they've ever transacted."},{"title":"Fraud screening for marketplace","prompt":"Run a buyer history check on job ID 44321 in the dealwork market — I need to know if this account has zero payments observed so I can flag it as a potential fake poster."},{"title":"Due diligence on new client","prompt":"I'm about to take on a client from dealwork with job ID 77890 — can you pull their buyer payment record so I can see how active they've been on the platform?"}],"resultDescription":"Returns a JSON snapshot containing the job_id, market, as_of date, a buyer object with ever_paid (boolean) and payments_observed (integer count), and a boundary field indicating the data derivation method (e.g. snapshot-derived).","failureModes":["Missing required job_id or market query params may return an error or empty result","Invalid or unknown job_id returns a buyer record with ever_paid: false and payments_observed: 0 (indistinguishable from a genuine zero-activity buyer)","Payment failure (x402 protocol issue or insufficient USDC balance) blocks the call","Stale snapshot data — as_of date may lag real-time by hours or days","Rate limiting or service unavailability on the pay.kenwardai.my.id host"],"whenToPreferThis":"Choose this endpoint when you need lightweight, per-call buyer payment history for a specific job poster on a supported marketplace (e.g. dealwork) without setting up an account or API key. Ideal for agents that need to verify buyer activity on-demand using x402 micropayments in USDC. Not suited for real-time transaction monitoring, bulk lookups, or marketplaces not supported by Kenward.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T01:06:07.827Z","isFirstParty":false,"canonicalSlug":"kenward-buyer-activity-lookup-api-x402-0cb70f4b"}