{"id":"5e0534ac-4750-4e3b-9358-5ac95bd1835c","shortId":"sg8buF","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","tagline":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a specific transaction receipt (transaction ID 167) behind an x402 paywall. The broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network via the x402 protocol.\n\nThe specific endpoint probed (/api/v1/transactions/167/receipt) returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the site's advertised pricing. Payment is made via the \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. No API keys or rate limits are required; access is granted purely through x402 payment.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the transaction receipt contains or what input parameters are accepted. The endpoint accepts POST requests and returns application/json, but the actual payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment endpoint"],"warnings":["No OpenAPI schema or machine-readable API documentation available","All documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt with no content","The specific endpoint is scoped to a single transaction ID (167); unclear if other transaction IDs are available","No request body schema or response schema is documented anywhere","The broader platform advertises many endpoints but none have verifiable documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/167/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/167/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 and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no documentation, no request/response examples, and the purpose of this specific receipt endpoint is unclear. The broader site lists many APIs but provides no substantive docs for any of 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'/api/v1/transactions/167/receipt':110 '/docs':183 '/pricing':185 '/readme':187 '0.02':92,138 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':157 '0x8335':126 '167':42 '20':120 '2913':127 '300':160 '6':133 'Base network API' 'USDC micropayment API' 'accept':223,226 'access':34,171 'actual':234 'address':156 'advertis':51,146 'ai/ml':63 'analysi':66 'analyt':62 'api':59,164 'application/json':231 'base':8,22,100,122,129 'base-network' 'behind':43 'broader':48 'call':12,26,140 'challeng':115 'classif':68 'connect':193 'consist':141 'contain':217 'content':199 'convers':85 'crypto payment endpoint' 'data':61,71 'decim':134 'descript':211 'detail':210 'document':178 'embed':69 'endpoint':6,20,30,88,108,225 'estim':79 'exact':153 'exampl':207 'exchang':74 'extrem':180 'feed':73 'finance/web3':70 'gas':78 'gate':3,17 'generat':86 'geocod':83 'grant':173 'id':41 'infer':64 'infrastructur':81 'input':220 'json-response' 'key':165 'limit':168 'lowpaymentfee' 'lowpaymentfee.com':32,49 'made':150 'maxamountrequir':118 'network':101 'no-api-key' 'openapi':203 'page':188 'paid':9,23 'paramet':221 'pay':56 'pay-per-call API' 'pay-per-request':55 'payload':235 'payment':148,177 'paywal':46 'per':11,25,57,93,139 'per-cal':10,24 'platform':50 'post':227 'price':72,90,147 'probe':109 'prompt':195 'protocol':105 'provid':33 'pure':174 'quot':77 'rate':75,167 'receipt':5,19,39,216 'render':190 'request':58,94,228 'request/response':206 'requir':170 'return':111,230 'schema':204 'scheme':154 'second':161 'sentiment':65 'settl':95 'sinc':130 'site':144 'span':60 'spars':181 'specif':37,107 'structur':236 'substant':198 'suit':53 'summar':67 'timeout':162 'token':76 'transact':4,18,38,40,215 'transaction receipt API' 'transaction-receipt' 'translat':136 'unit':123 'unknown':238 'usdc':14,28,97,125,131 'usdc-settlement' 'use':132 'util':82 'valid':84,113 'via':102,151 'wallet':194 'x402':2,16,45,104,114,176 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"acb811ab-42ff-4370-9702-7fac5599dd50","listingId":"5e0534ac-4750-4e3b-9358-5ac95bd1835c","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/167/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":"2026-04-18T18:58:57.627Z"}],"sources":[{"listingId":"5e0534ac-4750-4e3b-9358-5ac95bd1835c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/167/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:57.627Z","lastSeenAt":"2026-04-24T21:04:00.631Z"}],"details":{"listingId":"5e0534ac-4750-4e3b-9358-5ac95bd1835c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/167/receipt \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/167/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 advertises APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals","source_url":"https://lowpaymentfee.com/api/v1/transactions/167/receipt"}],"useCases":["Retrieving transaction receipt data for transaction 167 via a single micropayment","Programmatic access to receipt information without API key management","Agent-driven workflows that need to fetch financial transaction records on-demand"],"bestFor":["Developers wanting keyless, pay-per-use API access on Base","AI agents that can settle x402 payments in USDC","Use cases requiring low-friction access to transaction receipts"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Bulk retrieval of many transaction receipts (only transaction 167 is exposed at this endpoint)","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.594Z"},"updatedAt":"2026-04-24T21:04:00.631Z"}}