{"uid":"cap_kJoQqAtsFZ9zVYBkFtHJh","slug":"parallax-co-purchase-analysis-ef18fcfa","name":"Parallax Co-Purchase Analysis","description":"Co-purchase for one seller over the indexed window: how many of its buyers also pay someone else, the top ten co-sellers by shared buyers, and the lift of each association.","url":"https://parallax402.com/v1/basket","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"type":"string","const":"http"},"method":{"type":"string","const":"GET"},"queryParams":{"type":"object","required":["seller"],"properties":{"seller":{"type":"string","description":"the seller whose buyers are being looked up, as its payTo address or one of its hostnames"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type","format"],"properties":{"type":{"type":"string","const":"json"},"format":{"type":"string","const":"application/json","description":"the basket envelope: as_of, frame, coverage, method, attribution, tier, window_days and a fact carrying buyers, multi_seller_share and the top co-sellers with shared_buyers and lift"},"example":{"type":"object","description":"a worked response, shortened — the shape a full answer has"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QQb3sT16IfMfbIR7pT0nt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns co-purchase analytics for a single x402 seller: how many of its buyers also pay other sellers, the top 10 co-sellers by shared buyers, and the lift of each association.","exampleAgentPrompt":"Pull the co-purchase basket analysis for the seller at payTo address 0xAbC123... — I want to see what share of its buyers also shop elsewhere and which sellers rank highest by shared buyers and lift.","exampleUseCases":[{"title":"Competitor cross-sell discovery for a merchant","prompt":"I run the x402 seller at hostname shop.mystore.com — can you show me which other sellers my buyers are also paying, and what the lift looks like for the top ones?"},{"title":"Partnership targeting based on buyer overlap","prompt":"Pull the basket analysis for the seller with payTo address 0xDEF456... and tell me which top co-sellers share the most buyers — I'm trying to find good partnership candidates."},{"title":"Market positioning audit for an x402 seller","prompt":"What fraction of buyers for the seller at 0x789GHI... are multi-seller payers, and who are the top 10 sellers they overlap with most heavily?"}],"resultDescription":"A JSON envelope containing: as_of timestamp, frame, coverage, method, attribution, tier, and window_days metadata, plus a fact object with the seller's total buyer count, multi_seller_share (fraction of buyers who pay at least one other seller), and a ranked list of up to 10 co-sellers each with shared_buyer count and lift score.","failureModes":["Missing or unrecognized seller address/hostname returns an error or empty result","Seller has too few buyers within the indexed window for meaningful co-purchase statistics","Rate limiting or payment failure over x402 protocol returns 402 or 429","Malformed seller parameter (not a valid payTo address or hostname) causes validation failure","Seller exists but has no co-purchasing signal in the current indexed window"],"whenToPreferThis":"Use this endpoint when you need quantified market basket / co-purchase data grounded in actual x402 settlement graph transactions for a specific seller — not estimates or surveys. Prefer it over generic analytics when you need lift-scored, ranked co-seller associations backed by on-chain payment data with explicit coverage and freshness metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:31:41.409Z","isFirstParty":false}