{"uid":"cap_1SjuXqlUujyCgXCb4rS1r","slug":"x402-pulse-payer-wallet-check-8614f107","name":"x402 Pulse – Payer Wallet Check","description":"x402 Pulse: market intelligence and builder utilities for the x402 economy. What actually sells on x402, demand gaps, per-service traction checks, price benchmarks, payer wallet checks and a client self test, as cheap GET calls answered in under a second with explicit time information. Also on this host, ReactionPulse is an audience reaction and market research simulation for AI agents: it estimates how multiple stakeholder perspectives (customers, skeptical customers, developers, investors, competitors, early adopters, analysts, regulators, the market) would react to a product launch, announcement, price change, decision, news item, hypothesis or proposal, and returns sentiment analysis, objections, positive reactions, failure modes, market implications and recommended fixes. INPUT: JSON body {prompt (required, 8-6000 chars), context? (<=4000 chars), perspectives?[] (e.g. customer, skeptical_customer, developer, investor, competitor, early_adopter), audience?, output_language? (ISO code, default en)}. OUTPUT: strict JSON: overall_sentiment (0-100), positive_probability and negative_probability (0-1), controversy_score (0-100), perspectives[{role, stance, sentiment, headline, reasoning, top_concern, top_appeal}], likely_objections[], likely_positive_reactions[], failure_modes[{description, likelihood}], market_implications[], recommended_adjustments[], key_uncertainties[], confidence (0-1), input_integrity. TIERS: POST /v1/reaction = full analysis, 4-5 perspectives, $0.49 USDC; POST /v1/reaction/quick = 3 perspectives, compact lists, $0.15 USDC. Paid per call via x402 on Base; a free real sample is at GET /v1/example. LATENCY: full 15-30 s, quick 10-25 s (max 90 s; keep client timeouts at 120 s). LIMITATIONS: analytical LLM simulation, not a survey of real people; probabilities are estimates, not calibrated statistics; no web browsing (put relevant facts in context); one subject per call.","url":"https://reactionpulse-production.reactionpulse-x402.workers.dev/v1/x402/payer?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"EVM address on Base (0x + 40 hex chars)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"time":{"source":"live Base JSON-RPC, block tag latest","generated_at":"2026-09-22T12:00:00.000Z"},"address":"0xe0ce8de9d4c3c493acc5da7b3cc5dd0d74f1f140","verdict":"empty_throwaway","tx_count":0,"eth_balance":"0","is_contract":false,"can_pay_usdc":false,"usdc_balance":"0"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4_6eF_ee0ZJuNVMQ2idg2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up an EVM wallet address on Base to verify its USDC balance, ETH balance, transaction count, and ability to pay on the x402 network.","exampleAgentPrompt":"Can you check whether the wallet 0xe0ce8de9d4c3c493acc5da7b3cc5dd0d74f1f140 has enough USDC to pay on x402 — tell me its balance and whether it's a real funded wallet or just a throwaway?","exampleUseCases":[{"title":"Pre-flight payer qualification check","prompt":"Before I process this x402 request, check whether the wallet 0xabc123...def456 actually has USDC on Base and isn't an empty throwaway — give me its balance and verdict."},{"title":"Fraud screening for agent marketplace","prompt":"I need to screen this buyer wallet 0x1234567890abcdef1234567890abcdef12345678 before letting them access my paid API — is it funded, how many transactions has it made, and can it pay in USDC?"},{"title":"Debugging x402 payment failure","prompt":"My x402 payment is failing — can you pull up the details on my wallet 0xdeadbeef00000000000000000000000000000001 and tell me if it has any USDC balance on Base and what the current verdict is?"}],"resultDescription":"Returns a JSON object with the wallet address, a verdict string (e.g. 'empty_throwaway'), transaction count, ETH balance, USDC balance, a boolean can_pay_usdc flag, a boolean is_contract flag, and a time object showing when the data was fetched from the live Base chain.","failureModes":["Invalid address format (not 0x + 40 hex chars) returns 400 error","Address not found on Base returns zero balances with empty_throwaway verdict","RPC node unavailability may cause timeout or 503","Missing required 'address' query parameter returns 400"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap, live check on whether a specific Base wallet address can pay via x402 — particularly before gating access to a paid service, screening unknown payers, or debugging a payment failure. Prefer this over a full blockchain explorer when you just need the verdict, USDC balance, and basic wallet health in under a second.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:36:55.482Z","isFirstParty":false,"canonicalSlug":"x402-pulse-payer-wallet-check-8614f107"}