{"id":"81ea74d5-9e6a-4272-97a9-157b0c3eb172","shortId":"2neDka","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 273) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per call, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/273/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe platform markets itself as requiring no API keys, no rate limits, and no commitments — just per-request micropayments. Documentation pages (/docs, /pricing, /api, /README) all appear to require a wallet connection and contain no substantive content in the crawl, so the actual response schema and detailed API documentation are unknown. The endpoint is confirmed live (402 challenge captured).","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","transaction-receipt","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","micropayment API","USDC API","Base network API","lowpaymentfee"],"warnings":["No API documentation available — all doc pages require wallet connection and contain no content","Response schema for the receipt endpoint is completely unknown","The endpoint path references a specific transaction ID (273); it is unclear whether this is a generic pattern or a single fixed resource","No OpenAPI or machine-readable schema provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/273/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/273/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 pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and all documentation pages returned only a 'Connect wallet' prompt with no usable content. The specific purpose of this receipt endpoint is unclear beyond its URL 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'/api/v1/transactions/273/receipt':89 '/docs':174 '/pricing':175 '/readme':177 '0.02':10,24,76,134 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x8335':128 '20':122 '273':40 '2913':129 '300':149 '402':209 '6':138 'Base network API' 'USDC API' 'accept':90 'actual':195 'address':145 'advertis':118 'ai/ml':66 'analyt':65 'api':61,159,200 'appear':179 'base':8,22,84,124,131 'behind':41 'broader':50 'call':78 'caller':103 'captur':211 'challeng':117,210 'commit':166 'confirm':207 'connect':184 'contain':186 'content':189 'crawl':192 'data':64,69 'decim':139 'detail':199 'document':172,201 'endpoint':6,20,30,62,88,205 'equal':133 'finance/web3':68 'gate':3,17 'given':135 'handl':98 'header':110 'id':39 'includ':105 'infer':67 'infrastructur':71 'json':95 'json-response' 'key':160 'limit':163 'live':208 'lowpaymentfee' 'lowpaymentfee.com':32 'market':154 'maxamountrequir':120 'micropay':171 'micropayment API' 'must':104 'network':85 'offer':53 'page':173 'part':47 'pay':9,23,58 'pay-per-request':57 'payment':96,109,114,141 'payment receipt' 'paywal':44 'per':13,27,59,77,169 'per-request':168 'platform':51,153 'post':91 'post-method' 'price':74 'proof':115 'protocol':102 'provid':33 'rate':162 'receipt':5,19,36 'request':14,28,60,92,170 'requir':157,181 'resourc':37 'respons':196 'return':94 'schema':197 'second':150 'sent':143 'settl':79 'span':63 'specif':87 'substant':188 'timeout':151 'transact':4,18,35,38 'transaction receipt' 'transaction-receipt' 'unit':125 'unknown':203 'usdc':12,26,81,127,136 'usdc-base' 'util':72 'valid':113 'varieti':55 'via':99 'wallet':183 'x':108 'x-payment':107 'x402':2,16,43,101 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"cb85ea1e-cdcf-42fe-af71-d0fef09583f4","listingId":"81ea74d5-9e6a-4272-97a9-157b0c3eb172","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/273/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":"2026-04-18T18:59:44.423Z"}],"sources":[{"listingId":"81ea74d5-9e6a-4272-97a9-157b0c3eb172","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/273/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:44.423Z","lastSeenAt":"2026-04-24T15:03:06.771Z"}],"details":{"listingId":"81ea74d5-9e6a-4272-97a9-157b0c3eb172","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/273/receipt \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/273/receipt"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/273/receipt"},{"claim":"All 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 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 273 via micropayment","Programmatic access to receipt data without API key registration","Agent-driven workflows that need on-chain-settled receipt retrieval"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer micropayments over subscription billing"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need detailed API documentation before integrating (docs are sparse)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.368Z"},"updatedAt":"2026-04-24T15:03:06.771Z"}}