{"id":"26fdb2b6-f08d-47cc-a486-ebb018bd1ef6","shortId":"hwLrs9","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 245) 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 with 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call 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\nDocumentation is extremely sparse — the /docs, /api, /pricing, 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 example payloads available. The specific endpoint probed (/api/v1/transactions/245/receipt) is not listed on the homepage's API catalog, so its exact purpose and response format are unclear. The x402 challenge confirms the endpoint is live and accepting payment negotiations.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","transaction-receipt","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","402 payment required"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","The probed endpoint (/api/v1/transactions/245/receipt) is not listed on the provider's homepage API catalog","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content","The platform lists many API categories but provides no evidence of actual functionality behind them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/245/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/245/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and network details, but there is zero documentation for request/response schemas, no OpenAPI spec, and the specific endpoint is not listed in the site's own catalog. The docs pages are empty beyond a wallet connect prompt, making integration highly 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'/api/v1/transactions/245/receipt':195 '/docs':159 '/pricing':161 '/readme':163 '/request':17,34 '0.02':16,33,79,139 '000':81 '0x8335':66 '20':80 '245':51 '2913':67 '402 payment required' '6':85 'Base network API' 'USDC pay-per-call' 'accept':223 'access':43 'advertis':91 'ai':108 'analysi':112 'analyt':102 'api':99,144,203 'avail':190 'base':9,26,61,82 'base-network' 'broader':88 'call':4,21,77,98 'catalog':204 'challeng':216 'classif':115 'commit':152 'confirm':217 'connect':169 'contract':65 'convers':132 'crypto payment API' 'data':101,105 'decim':86 'detail':176 'document':154,185 'embed':116 'enabl':38 'endpoint':7,24,39,135,193,219 'estim':126 'exact':71,207 'exampl':188 'exchang':121 'export':106 'extrem':156 'feed':120 'financ':117 'format':211 'gas':125 'generat':133 'geocod':130 'homepag':201 'id':50 'infrastructur':128 'insight':107 'json-response' 'key':145 'learn':110 'limit':148 'list':137,198 'live':221 'lowpaymentfee' 'lowpaymentfee.com':41,89 'machin':109 'metric':103 'minimum':151 'negoti':225 'network':62 'no-api-key' 'openapi':180 'page':164 'pay':2,19,96 'pay-per-cal':1,18,95 'pay-per-call' 'payload':189 'payment':56,72,224 'per':3,20,76,97,140 'platform':90 'post':54 'price':75,119 'probe':194 'prompt':171 'provid':42 'purpos':208 'quot':124 'rate':122,147 'receipt':6,23,47 'render':166 'report':104 'request':55,141 'request/response':183 'requir':153 'resourc':48 'respons':210 'schema':184 'scheme':73 'sentiment':111 'settl':12,29,58 'span':100 'spars':157 'spec':181 'specif':192 'suit':93 'summar':114 'technic':175 'text':113 'token':123 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unclear':213 'unit':83 'usdc':14,31,64 'usdc-settlement' 'use':63 'util':129 'valid':131 'via':10,27,52 'wallet':170 'web3':118 'x402':11,28,37,70,215 'x402 micropayment' 'x402-enabled':36 'x402-payment'","prices":[{"id":"3ff0885f-c5f6-4157-ad90-5ce349f6b52b","listingId":"26fdb2b6-f08d-47cc-a486-ebb018bd1ef6","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/245/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":"2026-04-18T18:59:24.657Z"}],"sources":[{"listingId":"26fdb2b6-f08d-47cc-a486-ebb018bd1ef6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/245/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:24.657Z","lastSeenAt":"2026-04-24T17:03:04.858Z"}],"details":{"listingId":"26fdb2b6-f08d-47cc-a486-ebb018bd1ef6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/245/receipt\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with a valid x402 payment proof to receive the receipt.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 in USDC (6 decimals) on Base network, equating to $0.02","source_url":"https://lowpaymentfee.com/api/v1/transactions/245/receipt"},{"claim":"The homepage lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving transaction receipt data via a single micropayment","Agent-driven pay-per-call access without API key management","Programmatic access to receipt records settled on Base L2"],"bestFor":["Agents or scripts that need keyless, pay-per-use API access","Developers experimenting with x402 payment protocol integrations","Use cases requiring on-chain USDC micropayments on Base"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume batch processing where per-call pricing may add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.289Z"},"updatedAt":"2026-04-24T17:03:04.858Z"}}