{"uid":"cap_HZweVWDkT0j00WbxOEvSI","slug":"devx-agent-tools-on-chain-payment-verification-dd65fd93","name":"DevX Agent Tools – On-Chain Payment Verification","description":"Pay-per-call utilities for AI agents, no API key or signup: read any web page as clean Markdown ($0.002), link/SEO metadata ($0.001), domain DNS + SPF/DMARC email-security audit ($0.003), ERC-20 token safety pre-check ($0.005), crypto address validation, on-chain payment verification, EIP-681/BIP21/Solana Pay payment requests with QR, multichain USDC balances ($0.01). x402 v2, USDC on Base. Invalid input / upstream failure is never charged.","url":"https://devx-x402-tools.nextill-pos.workers.dev/v1/payment/verify?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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":["tx"],"properties":{"to":{"type":"string"},"tx":{"type":"string"},"chain":{"type":"string"},"min_usdc":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"chain":"base","found":true,"status":"success","confirmations":12,"meets_min_usdc":true,"usdc_transfers":[{"to":"0x...","from":"0x...","token":"USDC","amount":5}],"usdc_received_by_recipient":5}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yx8UwImcMhnjdky1jvxsa","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies that a specific blockchain transaction hash represents a valid USDC payment, returning confirmation count, transfer amounts, recipient, and whether a minimum threshold was met.","exampleAgentPrompt":"Can you verify that transaction 0xabc123...def on Base actually sent at least 5 USDC to 0xRecipientAddress...?","exampleUseCases":[{"title":"Release digital goods after payment","prompt":"Before I give this customer their download link, can you confirm that tx hash 0x7f3a...91bc on Base transferred at least 10 USDC to my wallet 0xMerchant...?"},{"title":"Validate invoice settlement on-chain","prompt":"The client says they paid invoice #1042 — the tx hash is 0xd4e2...88fa on Base. Can you check if it sent at least 50 USDC to 0xMyAddress... and how many confirmations it has?"},{"title":"Automated agent payment receipt check","prompt":"My agent just submitted a payment. Verify that 0x12ab...cd34 on Base is confirmed and sent at least 0.01 USDC to 0xServiceWallet..., so I know it went through before proceeding."}],"resultDescription":"Returns a JSON object with: whether the transaction was found, its status (success/pending/failed), number of on-chain confirmations, a list of all USDC transfers (from/to/amount), the total USDC received by the specified recipient, and a boolean indicating whether the minimum USDC threshold was met.","failureModes":["Transaction hash not yet indexed — returns found: false","Invalid tx hash format — input rejected, no charge","Network/chain not supported or unavailable — upstream failure, no charge","Transaction found but no USDC transfers present — returns empty usdc_transfers array","Minimum USDC not met — returns meets_min_usdc: false with actual amounts"],"whenToPreferThis":"Choose this endpoint when you need to programmatically confirm that a specific on-chain USDC transaction actually occurred and met a payment threshold — especially useful for x402 pay-per-call workflows, digital commerce, or any agentic system that must gate actions on verified payment. Prefer it over manual block explorer checks or heavier indexing solutions when you need a lightweight, pay-per-use verification call with no API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T07:05:52.943Z","isFirstParty":false,"canonicalSlug":"devx-agent-tools-on-chain-payment-verification-dd65fd93"}