{"id":"76127af1-78d7-44cc-b123-ee15de8a9026","shortId":"NgAQFn","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to a transaction receipt resource (transaction ID 379) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The price per call is $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint being listed here — `/api/v1/transactions/379/receipt` — appears to return a receipt for a particular transaction. Documentation beyond the landing page is essentially empty (all sub-pages only show a \"Connect wallet\" prompt), so the exact request body schema and response format are unknown. The endpoint is confirmed live, returning a proper 402 challenge with x402 version 1.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment endpoint"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all return only a 'Connect wallet' prompt with no actual content.","No OpenAPI or request/response schema is available; input and output formats are unknown.","This endpoint is scoped to a single transaction ID (379); it is unclear whether other transaction IDs are available at different URLs.","The platform advertises many API categories on its landing page, but none of them could be verified beyond the landing page listing."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/379/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/379/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge, but documentation is essentially nonexistent — all doc/pricing/API pages only render a wallet-connect prompt. There is no OpenAPI schema, no example request/response, and the specific purpose of this single-transaction receipt endpoint is unclear. The listing is largely inferred from the x402 challenge and the landing 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'/request':17,34 '0.02':16,33,80,142 '000':82 '0x8335':66 '1':215 '20':81 '2913':67 '379':51 '402':210 '6':88 'Base network API' 'USDC micropayment API' 'access':43 'advertis':94 'ai':111 'analysi':115 'analyt':105 'api':102,147 'appear':164 'base':9,26,61,83 'base-network' 'beyond':174 'bodi':195 'broader':91 'call':4,21,78 'challeng':211 'classif':118 'commit':155 'confirm':205 'connect':188 'contract':65 'convers':135 'crypto payment endpoint' 'data':104,108 'decim':89 'document':173 'embed':119 'empti':180 'enabl':38 'endpoint':7,24,39,138,159,203 'essenti':179 'estim':129 'exact':72,193 'exact-pay':71 'exchang':124 'export':109 'feed':123 'financ':120 'format':199 'gas':128 'generat':136 'geocod':133 'id':50 'infrastructur':131 'insight':110 'key':148 'land':176 'learn':113 'limit':151 'list':140,161 'live':206 'lowpaymentfee' 'lowpaymentfee.com':41,92 'machin':112 'metric':106 'minimum':154 'network':62 'no-api-key' 'page':177,184 'particular':171 'pay':2,19,99 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':98 'payment':56,73 'per':3,20,77,100,143 'platform':93 'post':54 'post-endpoint' 'price':76,122 'prompt':190 'proper':209 'provid':42 'quot':127 'rate':125,150 'receipt':6,23,47,168 'report':107 'request':55,101,144,194 'requir':156 'resourc':48 'respons':198 'return':166,207 'schema':196 'scheme':74 'sentiment':114 'settl':12,29,58 'show':186 'span':103 'specif':158 'sub':183 'sub-pag':182 'suit':96 'summar':117 'text':116 'token':126 'transact':5,22,46,49,172 'transaction receipt API' 'transaction-receipt' 'unit':84 'unknown':201 'usdc':14,31,64,86 'usdc-settlement' 'use':63 'util':132 'valid':134 'version':214 'via':10,27,52 'wallet':189 'web3':121 'x402':11,28,37,70,213 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"6a426817-1598-4e6f-bf89-d6e4bc5f2603","listingId":"76127af1-78d7-44cc-b123-ee15de8a9026","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/379/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":"2026-04-18T19:26:33.175Z"}],"sources":[{"listingId":"76127af1-78d7-44cc-b123-ee15de8a9026","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/379/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:33.175Z","lastSeenAt":"2026-04-24T06:32:43.139Z"}],"details":{"listingId":"76127af1-78d7-44cc-b123-ee15de8a9026","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/379/receipt \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 with x402 version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/transactions/379/receipt"},{"claim":"All APIs are listed at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/transactions/379/receipt"}],"useCases":["Retrieving a transaction receipt for transaction 379 via a single paid API call","Demonstrating x402 payment flow integration for agent-to-service commerce","Programmatic access to transaction data without traditional API key provisioning"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents needing keyless, pay-per-call access to transaction data","Projects requiring USDC-settled micropayment API interactions"],"notFor":["Bulk retrieval of many different transaction receipts (only transaction 379 is exposed at this URL)","Users who need detailed API documentation or OpenAPI schemas before integrating","Applications requiring sub-cent pricing or free-tier access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.582Z"},"updatedAt":"2026-04-24T06:32:43.139Z"}}