{"id":"529438b8-809c-48ee-adb2-24d3d8a38de1","shortId":"ufVxFX","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to a transaction receipt resource (transaction ID 341) 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). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics (metrics, reports, data export, insights), AI/ML inference (sentiment analysis, text summarization, classification, embeddings), finance and 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 the same x402 payment model on Base.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific endpoint being listed here (/api/v1/transactions/341/receipt) is not mentioned on the landing page's API catalog, so its exact purpose and response format are unclear beyond the generic \"Premium API Access\" description.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["No OpenAPI spec or response schema available","All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content","This specific endpoint (/api/v1/transactions/341/receipt) is not listed in the site's own API catalog — its purpose is unclear","The hardcoded transaction ID (341) in the path suggests this may be a single-resource endpoint rather than a general-purpose API"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/341/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/341/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 (returns a valid 402 x402 challenge), but documentation is essentially nonexistent — no OpenAPI spec, no request/response schemas, no examples. The specific endpoint path (/transactions/341/receipt) is not listed in the site's own API catalog, and all doc pages render only 'Connect wallet'. The purpose and output of this endpoint must be inferred entirely from its URL 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'/api/v1/transactions/341/receipt':222 '/docs':180 '/pricing':181 '/readme':184 '/request':17,34 '0.02':16,33,80,164 '000':82 '0x8335':66 '20':81 '2913':67 '341':51 '6':88 'Base network API' 'USDC micropayment API' 'access':43,247 'advertis':116 'ai/ml':133 'analysi':136 'analyt':127 'api':91,124,231,246 'attach':100 'avail':211 'base':9,26,61,83,174 'base-network' 'beyond':242 'broader':113 'call':4,21,78,123 'caller':98 'catalog':232 'classif':139 'connect':190 'contract':65 'convers':157 'crawl':214 'data':126,130 'decim':89 'descript':248 'detail':197 'document':175,206 'embed':140 'enabl':38 'endpoint':7,24,39,160,218 'estim':151 'exact':72,235 'exact-pay':71 'exampl':210 'exchang':146 'export':131 'extrem':177 'feed':145 'financ':141 'format':239 'gas':150 'generat':158 'generic':244 'geocod':155 'header':105 'id':50 'infer':134 'infrastructur':153 'insight':132 'key':92 'land':228 'limit':95 'list':162,220 'lowpaymentfee' 'lowpaymentfee.com':41,114 'materi':215 'mention':225 'metric':128 'model':172 'network':62 'no-api-key' 'openapi':201 'page':185,229 'pay':2,19,121 'pay-per-cal':1,18,120 'pay-per-call' 'pay-per-request API' 'payment':56,73,104,110,171 'per':3,20,77,122,165 'platform':115 'post':54 'premium':245 'price':76,144 'prompt':192 'proof':111 'provid':42 'purpos':236 'quot':149 'rate':94,147 'receipt':6,23,47 'render':187 'report':129 'request':55,166 'request/response':204 'requir':97 'resourc':48 'respons':238 'schema':205 'scheme':74 'sentiment':135 'settl':12,29,58 'simpli':99 'span':125 'spars':178 'spec':202 'specif':217 'suit':118 'summar':138 'technic':196 'text':137 'token':148 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unclear':241 'unit':84 'usag':209 'usdc':14,31,64,86 'usdc-settlement' 'use':63 'util':154 'valid':108,156 'via':10,27,52 'wallet':191 'web3':143 'x':103 'x-payment':102 'x402':11,28,37,70,109,170 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"04ccc85e-be79-49c7-bddd-20caa01341e6","listingId":"529438b8-809c-48ee-adb2-24d3d8a38de1","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/341/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":"2026-04-18T19:26:24.661Z"}],"sources":[{"listingId":"529438b8-809c-48ee-adb2-24d3d8a38de1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/341/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:24.661Z","lastSeenAt":"2026-04-24T06:32:42.770Z"}],"details":{"listingId":"529438b8-809c-48ee-adb2-24d3d8a38de1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/341/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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/341/receipt"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 341 via a single paid API call","Demonstrating x402 pay-per-call integration on the Base network","Programmatic access to transaction data without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Low-volume, on-demand transaction receipt retrieval"],"notFor":["High-volume batch transaction processing (no documented bulk endpoints)","Users who need detailed API documentation or response schemas before integrating","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.028Z"},"updatedAt":"2026-04-24T06:32:42.770Z"}}