{"id":"f4d76766-9195-45d1-bcfe-2b1c6ee7534d","shortId":"r3sM86","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","description":"This x402-enabled endpoint at lowpaymentfee.com provides a \"Premium API Access\" receipt for transaction 193. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC at $0.02 per request via the x402 payment protocol.\n\nThe specific endpoint `/api/v1/transactions/193/receipt` accepts POST requests and returns JSON. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network. The platform advertises no API keys, no rate limits, and instant access.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the receipt endpoint actually returns. The broader platform lists many endpoints but provides no documentation for any of them. The exact purpose of a \"transaction receipt\" in this context is unclear — it could be a blockchain transaction receipt, a payment receipt, or a demo/placeholder endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","transaction-receipt"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee"],"warnings":["No API documentation available — all doc pages show only 'Connect wallet'","No OpenAPI or request/response schema provided","Purpose of 'transaction 193 receipt' is unclear — may be a demo or placeholder","No information on what the response payload contains","Platform lists many endpoints but documents none of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/193/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/193/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually returns, no OpenAPI schema, no request/response examples, and all doc pages render only 'Connect wallet'. The specific purpose of a transaction receipt for ID 193 is 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'0.02':14,30,84,119 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':129 '193':48 '20':113 '6':124 'Base network API' 'USDC micropayment endpoint' 'accept':96 'access':44,145 'actual':185 'address':128 'advertis':136 'ai/ml':68 'analyt':67 'api':43,63,138,152 'base':9,25,79,115,132 'base-network' 'blockchain':217 'broader':54,188 'call':4,20 'challeng':104 'confirm':105 'connect':161 'content':167 'context':210 'could':214 'data':66,71 'decim':125 'demo/placeholder':225 'descript':179 'detail':178 'doc':151 'document':146,196 'dozen':57 'enabl':36 'endpoint':7,23,37,64,94,184,192,226 'exact':202 'exampl':175 'extrem':148 'finance/web3':70 'infer':69 'infrastructur':73 'instant':144 'json':101 'json-response' 'key':139 'limit':142 'list':190 'live':108 'lowpaymentfee' 'lowpaymentfee.com':39 'mani':191 'maximum':111 'network':80,133 'offer':56 'openapi':171 'page':156 'paid':126 'part':51 'pay':2,18,60 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':59 'payment':90,221 'per':3,19,61,85 'platform':55,135,189 'post':97 'premium':42 'price':12,28,153 'prompt':163 'protocol':91 'provid':40,194 'purpos':203 'rate':141 'readm':155 'receipt':6,22,45,183,207,219,222 'render':158 'request':62,86,98 'request/response':174 'requir':109 'return':100,186 'schema':172 'settl':76 'sinc':121 'span':65 'spars':149 'specif':93 'substant':166 'transact':5,21,47,206,218 'transaction receipt API' 'transaction-receipt' 'unclear':212 'unit':116 'usd':120 'usdc':16,32,82,118,122 'usdc-settlement' 'use':81,123 'util':74 'via':10,26,87 'wallet':162 'x402':11,27,35,89,103 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"e976d13e-9fd8-4893-9b3c-5c38ebf49e20","listingId":"f4d76766-9195-45d1-bcfe-2b1c6ee7534d","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/193/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":"2026-04-18T18:59:07.198Z"}],"sources":[{"listingId":"f4d76766-9195-45d1-bcfe-2b1c6ee7534d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/193/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:07.198Z","lastSeenAt":"2026-04-24T20:03:14.495Z"}],"details":{"listingId":"f4d76766-9195-45d1-bcfe-2b1c6ee7534d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/193/receipt \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 endpoint returns a 402 challenge requiring 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/193/receipt"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/193/receipt"},{"claim":"Docs, API, pricing, and README pages all render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a receipt for transaction 193 via a single paid API call","Demonstrating x402 payment protocol integration for agent-to-API commerce","Programmatic access to transaction data without API key management"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents needing keyless, pay-per-call API access settled in USDC","Testing micropayment workflows with low-cost endpoints"],"notFor":["Production use cases requiring documented request/response schemas","Bulk or high-volume data retrieval (no batch endpoints documented)","Users who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.145Z"},"updatedAt":"2026-04-24T20:03:14.495Z"}}