{"id":"33531ef8-ecc9-4108-8ccf-d9254b972c0f","shortId":"Lpgsxm","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 a transaction receipt retrieval API. The specific resource `/api/v1/transactions/377/receipt` returns a receipt for transaction ID 377 in JSON format. Payment is handled inline via the x402 protocol: callers attach a USDC payment on the Base network in the `X-PAYMENT` header, and the endpoint responds with the requested data. The price is $0.02 per request (20,000 base units of USDC with 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a wide catalog 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. Payment settles on the Base L2 network in USDC.\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 schema, no request/response examples, and no explanation of what fields the receipt object contains or what input parameters are expected. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation makes it difficult to use without experimentation.","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 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema available — request parameters and response shape are unknown","The endpoint path includes a hardcoded transaction ID (377); it is unclear how to query other transactions","The broad catalog of 16+ endpoints (AI, finance, utilities) all at identical $0.02 pricing with no documentation raises questions about actual functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/377/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/377/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — no OpenAPI schema, no request/response examples, no field descriptions. The specific endpoint path (/transactions/377/receipt) suggests a fixed resource rather than a parameterized API, and the broader platform's many advertised endpoints lack any technical detail beyond names and 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'/api/v1/transactions/377/receipt':51 '/docs':190 '/pricing':192 '/readme':194 '/request':17,34 '0.02':16,33,96,161 '000':100 '20':99 '377':58 '402':240 '6':106 'Base network API' 'USDC micropayment API' 'advertis':112 'ai':130 'analysi':134 'analyt':124 'api':47,121,166 'attach':71 'base':9,26,77,101,180 'base-network' 'broader':109 'call':4,21,120 'caller':70 'catalog':115 'challeng':242 'classif':137 'commit':174 'confirm':235 'connect':200 'contain':225 'convers':154 'data':92,123,127 'decim':107 'detail':207 'difficult':250 'document':185,247 'embed':138 'enabl':38 'endpoint':7,24,39,87,157,233 'estim':148 'exampl':215 'exchang':143 'expect':231 'experiment':254 'explan':218 'export':128 'extrem':187 'feed':142 'field':221 'financ':139 'format':61 'gas':147 'generat':155 'geocod':152 'handl':64 'header':84 'id':57 'infrastructur':150 'inlin':65 'input':228 'insight':129 'json':60 'json-response' 'key':167 'l2':181 'lack':245 'learn':132 'limit':170 'list':159 'live':236 'lowpaymentfee' 'lowpaymentfee.com':41,110 'machin':131 'make':248 'metric':125 'minimum':173 'network':78,182 'no-api-key' 'object':224 'openapi':211 'page':195 'paramet':229 'pay':2,19,118 'pay-per-cal':1,18,117 'pay-per-call' 'pay-per-request API' 'payment':62,74,83,176 'per':3,20,97,119,162 'platform':111 'price':94,141 'prompt':202 'proper':239 'protocol':69 'provid':42 'quot':146 'rate':144,169 'receipt':6,23,45,54,223 'render':197 'report':126 'request':91,98,163 'request/response':214 'requir':175 'resourc':50 'respond':88 'retriev':46 'return':52,237 'schema':212 'sentiment':133 'settl':12,29,177 'span':122 'spars':188 'specif':49 'summar':136 'technic':206 'text':135 'token':145 'transact':5,22,44,56 'transaction receipt API' 'transaction-receipt' 'unit':102 'usdc':14,31,73,104,184 'usdc-settlement' 'use':252 'util':151 'valid':153 'via':10,27,66 'wallet':201 'web3':140 'wide':114 'without':253 'x':82 'x-payment':81 'x402':11,28,37,68,241 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"03cfad18-df6b-4793-a247-dba6742b05c0","listingId":"33531ef8-ecc9-4108-8ccf-d9254b972c0f","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/377/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":"2026-04-18T19:26:30.081Z"}],"sources":[{"listingId":"33531ef8-ecc9-4108-8ccf-d9254b972c0f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/377/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:30.081Z","lastSeenAt":"2026-04-24T06:32:43.006Z"}],"details":{"listingId":"33531ef8-ecc9-4108-8ccf-d9254b972c0f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/377/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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/377/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 asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/377/receipt"}],"useCases":["Retrieving transaction receipts programmatically with per-call USDC payment","Agent-driven workflows that need verifiable transaction data without subscription overhead","Integrating pay-as-you-go receipt lookups into Web3 applications"],"bestFor":["Developers wanting zero-commitment, pay-per-call access to transaction receipts","AI agents that can settle x402 payments on Base in USDC","Projects needing no-API-key access to financial data endpoints"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume batch retrieval where per-call pricing becomes expensive","Non-crypto workflows that cannot settle payments on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.733Z"},"updatedAt":"2026-04-24T06:32:43.006Z"}}