{"id":"77c57ef0-94a0-40a8-a7a4-f58e1581b900","shortId":"r9GTUv","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, priced at $0.02 in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" receipt resource for transaction ID 300. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated via the x402 payment protocol on the Base network.\n\nThe specific endpoint `/api/v1/transactions/300/receipt` accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header. The payment timeout is 300 seconds.\n\nDocumentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the receipt endpoint actually returns. The broader platform advertises categories like sentiment analysis, text summarization, embeddings, geocoding, price feeds, and more — all at $0.02 per request — but without documentation it is unclear what data or functionality each endpoint actually provides.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","json-response","transaction-receipt","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","402 payment endpoint"],"warnings":["No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or output schema describing request parameters or response format","The specific purpose and data returned by /api/v1/transactions/300/receipt is undocumented","The endpoint path contains a hardcoded transaction ID (300), suggesting it may be a demo or single-resource endpoint"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/300/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/300/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 captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only 'Connect wallet' with no usable content. The purpose of this specific receipt endpoint is not explained beyond its generic title. Effectively a stub 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'0.02':14,30,116,212 '000':111 '0x8335':101 '20':110 '2913':102 '300':47,148 '402 payment endpoint' '6':119 'Base network API' 'USDC micropayment API' 'accept':89 'access':41 'actual':192,227 'advertis':197 'ai/ml':67 'amount':108 'analysi':201 'analyt':66 'api':40,62,124,159 'base':9,25,83,104,112 'base-network' 'broader':53,195 'call':4,20,134 'categori':198 'commit':132 'connect':168 'content':174 'contract':100 'data':65,70,222 'decim':120 'descript':186 'detail':185 'doc':158 'document':150,217 'dozen':56 'embed':204 'endpoint':7,23,34,63,87,191,226 'equal':115 'exampl':182 'extrem':155 'feed':207 'finance/web3':69 'function':224 'gate':75 'geocod':205 'header':143 'id':46 'individu':137 'infer':68 'infrastructur':72 'json':94 'json-response' 'key':125 'like':199 'limit':128 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':107 'network':84 'no-api-key' 'no-rate-limit' 'offer':55 'openapi':178 'page':163 'paid':136 'part':50 'pay':2,18,59 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':58 'payment':79,95,142,145 'per':3,19,60,213 'per-request-billing' 'platform':54,196 'post':90 'premium':39 'price':12,28,160,206 'prompt':170 'protocol':80 'provid':37,228 'rate':127 'readm':162 'receipt':6,22,42,190 'render':165 'request':61,91,214 'request/response':181 'resourc':43 'return':93,193 'schema':179 'second':149 'sentiment':200 'settl':97 'site':153 'span':64 'spars':156 'specif':86 'subscript':131 'summar':203 'text':202 'timeout':146 'transact':5,21,45 'transaction receipt API' 'transaction-receipt' 'unclear':220 'unit':113 'usdc':16,32,99,117 'usdc-settlement' 'use':118 'util':73 'via':10,26,76,138 'wallet':169 'without':216 'x':141 'x-payment':140 'x402':11,27,78 'x402 API' 'x402-payment'","prices":[{"id":"03090ac1-6e50-426f-abaa-2baf1742be86","listingId":"77c57ef0-94a0-40a8-a7a4-f58e1581b900","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/300/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":"2026-04-18T19:25:51.986Z"}],"sources":[{"listingId":"77c57ef0-94a0-40a8-a7a4-f58e1581b900","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/300/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:51.986Z","lastSeenAt":"2026-04-24T12:04:10.146Z"}],"details":{"listingId":"77c57ef0-94a0-40a8-a7a4-f58e1581b900","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/300/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 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/300/receipt"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/300/receipt"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no documentation content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 300 via a single paid API call","Demonstrating x402 payment-gated API access on Base","Integrating pay-per-request endpoints into agent workflows without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Low-volume consumers who prefer no subscription commitments"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume batch processing where per-request pricing is inefficient","Anyone requiring non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.547Z"},"updatedAt":"2026-04-24T12:04:10.146Z"}}