{"id":"b8168168-9753-45b5-be32-567097f19fbd","shortId":"ZJS4dR","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 endpoint at lowpaymentfee.com provides a transaction receipt retrieval service behind an x402 paywall. The specific resource `/api/v1/transactions/181/receipt` returns a receipt for transaction 181 in JSON format. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nlowpaymentfee.com is a broader platform offering multiple x402-gated API categories including 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 probed endpoint is live, returning a proper x402 version 1 challenge with the `exact` payment scheme. The endpoint accepts POST requests and is marked as discoverable. Documentation pages (/docs, /api, /pricing, /README) all appear to require wallet connection and provide no additional technical detail, so the actual response schema and request body format for this specific receipt endpoint remain undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or schema documentation available for request or response formats","All doc pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt with no technical content","The specific endpoint path references a hardcoded transaction ID (181), making it unclear how to generalize usage","The platform lists many API categories but no detailed documentation is accessible without wallet connection"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/181/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/181/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 challenge, but there is no OpenAPI schema, no documented request/response format, and all documentation pages require wallet connection with no visible content. The specific purpose of 'transaction 181 receipt' is unclear, and no example responses are 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'/api/v1/transactions/181/receipt':52 '/docs':187 '/pricing':189 '/readme':190 '/request':17,34 '0.02':16,33,85,143 '000':80 '0x8335':72 '1':168 '181':58 '20':79 '2913':73 '6':90 'Base network API' 'USDC micropayment API' 'accept':177 'actual':205 'addit':200 'ai':112 'analysi':116 'analyt':106 'api':102,148 'appear':192 'base':9,26,67,81 'base-network' 'behind':45 'bodi':210 'broader':95 'call':4,21 'categori':103 'challeng':169 'classif':119 'commit':156 'connect':196 'contract':71 'convers':136 'cost':77 'crypto payment API' 'data':105,109 'decim':91 'detail':202 'discover':184 'document':185 'embed':120 'endpoint':7,24,36,139,160,176,216 'equal':84 'estim':130 'exact':172 'exchang':125 'export':110 'feed':124 'financ':121 'format':61,211 'gas':129 'gate':101 'generat':137 'geocod':134 'includ':104 'infrastructur':132 'insight':111 'json':60 'json-response' 'key':149 'learn':114 'limit':152 'list':141 'live':162 'lowpaymentfee' 'lowpaymentfee.com':38,92 'machin':113 'mark':182 'maximum':76 'metric':107 'minimum':155 'multipl':98 'network':68 'no-api-key' 'offer':97 'page':186 'pay':2,19 'pay-per-cal':1,18 'pay-per-call' 'pay-per-request API' 'payment':62,173 'paywal':48 'per':3,20,86,144 'platform':96 'post':178 'price':123 'probe':159 'proper':165 'provid':39,198 'quot':128 'rate':126,151 'receipt':6,23,42,55,215 'remain':217 'report':108 'request':87,145,179,209 'requir':157,194 'resourc':51 'respons':206 'retriev':43 'return':53,163 'schema':207 'scheme':174 'sentiment':115 'servic':44 'settl':12,29,64 'specif':50,214 'summar':118 'technic':201 'text':117 'token':127 'transact':5,22,41,57 'transaction receipt API' 'transaction-receipt' 'undocu':218 'unit':82 'usdc':14,31,70,88 'usdc-settlement' 'use':69,89 'util':133 'valid':135 'version':167 'via':10,27 'wallet':195 'web3':122 'x402':11,28,47,100,166 'x402 paid endpoint' 'x402-gated':99 'x402-payment'","prices":[{"id":"785ade5b-b817-4399-b4e7-c8e9c9a5bf07","listingId":"b8168168-9753-45b5-be32-567097f19fbd","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/181/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":"2026-04-18T18:58:54.020Z"}],"sources":[{"listingId":"b8168168-9753-45b5-be32-567097f19fbd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/181/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:54.020Z","lastSeenAt":"2026-04-24T21:04:00.492Z"}],"details":{"listingId":"b8168168-9753-45b5-be32-567097f19fbd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/181/receipt \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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 x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units in USDC","source_url":"https://lowpaymentfee.com/api/v1/transactions/181/receipt"},{"claim":"All endpoints 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 offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/181/receipt"}],"useCases":["Retrieving transaction receipts programmatically with per-call USDC payment","Integrating pay-per-use API access into agent workflows without API key management","Demonstrating x402 protocol payment flows on the Base network"],"bestFor":["Agents or applications that need on-demand transaction receipt data with no subscription","Developers exploring x402 protocol integrations on Base","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["High-volume batch retrieval where per-call pricing becomes expensive","Users who need detailed API documentation or response schema guarantees before integrating","Applications requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.713Z"},"updatedAt":"2026-04-24T21:04:00.492Z"}}