{"id":"ba592dd3-4441-4373-a550-b0de65e9952d","shortId":"J7QJM7","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 165) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/165/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe platform markets itself as requiring no API keys, no rate limits, and no commitments — just per-request micropayments. Documentation pages (/docs, /pricing, /api, /README) all appear to require a wallet connection and contain no additional rendered content in the crawl. As a result, the actual response schema, detailed field descriptions, and deeper documentation are unavailable, making it difficult to assess what data the receipt endpoint actually returns.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["All documentation pages (/docs, /pricing, /api, /README) render only a wallet-connect prompt — no actual docs are available from the crawl.","The endpoint path references a specific transaction ID (165); it is unclear whether this is a generic pattern or a single fixed resource.","No response schema or example response is available; the actual data returned is unknown.","The broader platform lists many API categories (AI, finance, analytics, utilities) all at $0.02, but none have documented schemas — the platform may be a demo or early-stage project."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/165/receipt","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/165/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no response examples, and all documentation pages render only a wallet-connect prompt with no useful content. The specific purpose of a 'transaction 165 receipt' is unclear, and no input/output schemas are 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'/api/v1/transactions/165/receipt':89 '/docs':175 '/pricing':176 '/readme':178 '0.02':10,24,75,135 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '0x8335':129 '165':40 '20':123 '2913':130 '300':150 '6':139 'Base network API' 'USDC micropayment API' 'accept':90 'actual':199,220 'addit':189 'address':146 'advertis':118 'ai/ml':65 'amount':121 'analyt':64 'api':61,160 'appear':180 'assess':214 'base':8,22,84,125,132 'base-network' 'behind':41 'broader':50 'call':60 'caller':103 'challeng':117 'commit':167 'connect':185 'contain':187 'content':191 'crawl':194 'data':63,68,216 'decim':140 'deeper':206 'descript':204 'detail':202 'difficult':212 'document':173,207 'endpoint':6,20,30,88,219 'equal':134 'field':203 'finance/web3':67 'gate':3,17 'given':136 'handl':98 'header':110 'id':39 'includ':105 'infer':66 'json':95 'json-response' 'key':161 'limit':164 'lowpaymentfee' 'lowpaymentfee.com':32 'make':210 'market':155 'max':120 'micropay':172 'must':104 'network':85 'no-api-key' 'offer':53 'page':174 'part':47 'pay':9,23,58 'pay-per-cal':57 'pay-per-call API' 'pay-per-request' 'payment':96,109,114,142 'paywal':44 'per':13,27,59,76,170 'per-request':169 'platform':51,154 'post':91 'price':73 'proof':115 'protocol':102 'provid':33 'rate':163 'receipt':5,19,36,218 'render':190 'request':14,28,77,92,171 'requir':158,182 'resourc':37 'respons':200 'result':197 'return':94,221 'schema':201 'second':151 'sent':144 'servic':71 'settl':79 'span':62 'specif':87 'timeout':152 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'unavail':209 'unit':126 'usdc':12,26,81,128,137 'usdc-micropayment' 'util':70 'valid':113 'varieti':55 'via':99 'wallet':184 'x':108 'x-payment':107 'x402':2,16,43,101 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"12d64ace-eb7f-4985-8a08-fa1eec28d7ba","listingId":"ba592dd3-4441-4373-a550-b0de65e9952d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/transactions/165/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:53.395Z"}],"sources":[{"listingId":"ba592dd3-4441-4373-a550-b0de65e9952d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/165/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:53.395Z","lastSeenAt":"2026-04-24T21:04:00.367Z"}],"details":{"listingId":"ba592dd3-4441-4373-a550-b0de65e9952d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/165/receipt \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/165/receipt"},{"claim":"USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/165/receipt"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and no commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 165 via a micropayment","Demonstrating x402 protocol integration for agent-to-service payments","Programmatic access to paid receipt data without traditional API key management"],"bestFor":["Developers experimenting with x402 micropayment protocols","Agents that need to fetch transaction receipts on-demand","Projects wanting keyless, pay-per-use API access on Base"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need detailed API documentation before integrating","Applications requiring free or subscription-based access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.821Z"},"updatedAt":"2026-04-24T21:04:00.367Z"}}