{"id":"8eb012d0-3eca-437a-bbac-059edef4dd1d","shortId":"2w6NDj","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 180) 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.\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/180/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 accepts POST requests returning application/json.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","transaction-receipt","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","crypto payment endpoint"],"warnings":["No OpenAPI spec or schema documentation available","The /docs, /pricing, /api, and /README pages contain no usable content","This specific endpoint (/api/v1/transactions/180/receipt) is not listed in the site's published API catalog","No request body schema or response schema documented anywhere","Purpose and data returned by this endpoint are unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/180/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/180/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 (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response examples, and the specific endpoint path is not listed in the site's own catalog. The docs/pricing/README pages are all empty beyond a wallet connect prompt. Effectively a stub 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'/api/v1/transactions/180/receipt':194 '/docs':158 '/pricing':160 '/readme':162 '/request':17,34 '0.02':16,33,79,139 '000':81 '0x8335':66 '180':51 '20':80 '2913':67 '6':85 'Base network API' 'USDC micropayment API' 'accept':222 'access':43 'advertis':91 'ai':108 'analysi':112 'analyt':102 'api':99,144,202 'application/json':226 'avail':189 'base':9,26,61,82 'base-network' 'broader':88 'call':4,21,77,98 'catalog':203 'challeng':215 'classif':115 'commit':152 'confirm':216 'connect':168 'contract':65 'convers':132 'crypto payment endpoint' 'data':101,105 'decim':86 'detail':175 'document':153,184 'embed':116 'enabl':38 'endpoint':7,24,39,135,192,218 'estim':126 'exact':71,206 'exampl':187 'exchang':121 'export':106 'extrem':155 'feed':120 'financ':117 'format':210 'gas':125 'generat':133 'geocod':130 'homepag':200 'id':50 'infrastructur':128 'insight':107 'json-response' 'key':145 'learn':110 'limit':148 'list':137,197 'live':220 'lowpaymentfee' 'lowpaymentfee.com':41,89 'machin':109 'metric':103 'minimum':151 'network':62 'openapi':179 'page':163 'pay':2,19,96 'pay-per-cal':1,18,95 'pay-per-call' 'pay-per-request API' 'payload':188 'payment':56,72 'per':3,20,76,97,140 'platform':90 'post':54,223 'price':75,119 'probe':193 'prompt':170 'provid':42 'purpos':207 'quot':124 'rate':122,147 'receipt':6,23,47 'render':165 'report':104 'request':55,141,224 'request/response':182 'resourc':48 'respons':209 'return':225 'schema':183 'scheme':73 'sentiment':111 'settl':12,29,58 'span':100 'spars':156 'spec':180 'specif':191 'suit':93 'summar':114 'technic':174 'text':113 'token':123 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unclear':212 'unit':83 'usdc':14,31,64 'usdc-settlement' 'use':63 'util':129 'valid':131 'via':10,27,52 'wallet':169 'web3':118 'x402':11,28,37,70,214 'x402 API' 'x402-enabled':36 'x402-payment'","prices":[{"id":"02c72e32-e6bc-475b-a1c0-2e40a8da7c5d","listingId":"8eb012d0-3eca-437a-bbac-059edef4dd1d","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/180/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":"2026-04-18T18:58:53.385Z"}],"sources":[{"listingId":"8eb012d0-3eca-437a-bbac-059edef4dd1d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/180/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:53.385Z","lastSeenAt":"2026-04-24T21:32:28.815Z"}],"details":{"listingId":"8eb012d0-3eca-437a-bbac-059edef4dd1d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/180/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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/180/receipt"},{"claim":"All listed 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 offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving transaction receipt data with per-call USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to receipt records settled on Base L2"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.819Z"},"updatedAt":"2026-04-24T21:32:28.815Z"}}