{"id":"9bc12af1-3272-4498-8392-342db85fbcb9","shortId":"hXhMD5","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" receipt resource for transaction ID 249. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories—all priced at $0.02 per call with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/transactions/249/receipt` accepts POST requests and is gated by the x402 payment protocol (version 1) on the Base network. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The response MIME type is application/json. The payment timeout is 300 seconds.\n\nThe broader platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation—all at the same $0.02 price point. However, documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail, so the actual response schema and payload structure for this receipt endpoint remain undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt API","x402 endpoint","USDC micropayment","Base network API","lowpaymentfee","pay-per-call API"],"warnings":["No response schema or example payloads documented anywhere","All documentation pages (docs, api, pricing, README) return only 'Connect wallet' with no useful content","The specific endpoint is for transaction ID 249 which may be a static/demo resource rather than a general-purpose API","Platform legitimacy and actual data behind endpoints cannot be verified from available material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/249/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/249/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 (returns 402 challenge correctly) and pricing is clear, but there is no documentation of request/response schemas, no OpenAPI spec, and all doc pages return only 'Connect wallet'. The specific purpose of this receipt endpoint beyond its name is 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'/request':13,28 '0.02':12,27,72,124,176 '000':120 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':113 '1':102 '20':119 '249':45 '300':140 '6':128 'Base network API' 'USDC micropayment' 'accept':90 'access':39 'across':59 'actual':199 'advertis':145 'ai/ml':62 'amount':117 'analysi':154 'analyt':61 'api':38,58,77 'application/json':135 'base':9,24,105,121 'base-network' 'beyond':182 'broader':51,143 'call':4,19,74 'categori':68 'classif':157 'commit':84 'connect':189 'contract':112 'convers':169 'data':60,150 'decim':129 'detail':196 'document':180 'embed':158 'endpoint':7,22,32,88,146,208 'estim':166 'exchang':161 'export':151 'feed':160 'finance/web3':64 'gas':165 'gate':95 'generat':171 'geocod':167 'given':125 'howev':179 'i.e':123 'id':44 'infer':63 'infrastructur':66 'insight':152 'json-response' 'key':78 'land':184 'limit':81 'lowpaymentfee' 'lowpaymentfee.com':34 'max':116 'metric':148 'mime':132 'network':106 'no-api-key' 'offer':53 'page':181,185 'part':48 'pay':2,17,55 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':54 'payload':203 'payment':99,107,137 'payment receipt API' 'per':3,18,56,73 'platform':52,144 'point':178 'post':91 'premium':37 'price':70,159,177 'prompt':191 'protocol':100 'provid':35 'quot':164 'rate':80,162 'receipt':6,21,40,207 'remain':209 'report':149 'request':57,92 'requir':85 'resourc':41 'respons':131,200 'return':186 'schema':201 'second':141 'sentiment':153 'settl':109 'specif':87 'structur':204 'summar':156 'technic':195 'text':155 'timeout':138 'token':163 'transact':5,20,43 'transaction receipt' 'transaction-receipt' 'type':133 'undocu':210 'unit':122 'usdc':15,30,111,126 'usdc-settlement' 'util':67 'valid':168 'version':101 'via':10,25 'wallet':190 'x402':11,26,98 'x402 endpoint' 'x402-payment'","prices":[{"id":"458dc84a-427b-4aca-bc3e-5abef5a06b20","listingId":"9bc12af1-3272-4498-8392-342db85fbcb9","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/249/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":"2026-04-18T18:59:26.454Z"}],"sources":[{"listingId":"9bc12af1-3272-4498-8392-342db85fbcb9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/249/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:26.454Z","lastSeenAt":"2026-04-24T16:03:18.187Z"}],"details":{"listingId":"9bc12af1-3272-4498-8392-342db85fbcb9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/249/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":"Endpoint returns x402 version 1 challenge with maxAmountRequired 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/249/receipt"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/249/receipt"}],"useCases":["Retrieving a transaction receipt after completing a payment","Programmatic verification of transaction completion","Agent-driven workflows requiring proof-of-payment documents","Integrating pay-per-use receipt generation into dApps"],"bestFor":["Developers needing low-cost, keyless API access on Base","AI agents that can settle x402 payments autonomously","Applications requiring per-call billing without subscriptions"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-throughput batch processing where per-call fees accumulate significantly","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.251Z"},"updatedAt":"2026-04-24T16:03:18.187Z"}}