{"id":"463b83f9-716b-4eec-ad06-9b610645d4ef","shortId":"tEFuDQ","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 access to a transaction receipt (transaction ID 310) 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/310/receipt` accepts POST requests and returns a JSON response upon successful payment. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the \"exact\" scheme with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /api, /README) all resolve but contain only a \"Connect wallet\" prompt, so detailed request/response schemas and endpoint-specific documentation are not available. The actual data returned by this receipt endpoint is unclear — it could be a financial transaction receipt, a proof-of-payment artifact, or something else entirely. Without further documentation or example responses, the precise use case remains ambiguous.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","transaction-receipt","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","receipt endpoint"],"warnings":["All documentation pages (/docs, /pricing, /api, /README) return only 'Connect wallet' with no actual content","No request body schema or response schema available — unclear what data this endpoint returns","The endpoint path references a specific transaction ID (310); it is unclear whether this is a generic pattern or a single fixed resource","No OpenAPI or machine-readable API specification found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/310/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/310/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing. However, all documentation pages are empty (just 'Connect wallet'), there is no OpenAPI spec, no request/response schema, and the purpose of this specific receipt endpoint is ambiguous. Effectively a stub 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'/api/v1/transactions/310/receipt':90 '/docs':156 '/pricing':157 '/readme':159 '0.02':10,24,77,121 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x8335':115 '20':109 '2913':116 '300':139 '310':41 '6':125 'Base network API' 'USDC micropayment API' 'accept':91 'access':34,153 'actual':182 'address':131 'advertis':105,144 'ai/ml':67 'ambigu':219 'analyt':66 'api':62,146 'artifact':203 'avail':180 'base':8,22,85,111,118 'base-network' 'behind':42 'broader':51 'call':79 'case':217 'challeng':104 'connect':166 'contain':163 'could':192 'data':65,70,183 'decim':126 'detail':170 'document':154,177,210 'els':206 'endpoint':6,20,30,63,89,175,188 'endpoint-specif':174 'entir':207 'equal':120 'exact':135 'exampl':212 'finance/web3':69 'financi':195 'gate':3,17 'given':122 'id':40 'infer':68 'infrastructur':72 'instant':152 'json':97 'json-response' 'key':147 'limit':150 'lowpaymentfee' 'lowpaymentfee.com':32 'maxamountrequir':107 'network':86 'no-api-key' 'offer':54 'page':155 'part':48 'pay':9,23,59 'pay-per-call API' 'pay-per-request':58 'payment':101,127,202 'paywal':45 'per':13,27,60,78 'platform':52,143 'post':92 'precis':215 'price':75 'prompt':168 'proof':200 'proof-of-pay':199 'provid':33 'rate':149 'receipt':5,19,38,187,197 'receipt endpoint' 'remain':218 'request':14,28,61,93 'request/response':171 'resolv':161 'respons':98,213 'return':95,184 'schema':172 'scheme':136 'second':140 'sent':129 'settl':80 'someth':205 'span':64 'specif':88,176 'success':100 'timeout':141 'transact':4,18,37,39,196 'transaction receipt API' 'transaction-receipt' 'unclear':190 'unit':112 'upon':99 'usdc':12,26,82,114,123 'usdc-settlement' 'use':133,216 'util':73 'varieti':56 'wallet':167 'without':208 'x402':2,16,44,103 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"3e085878-98df-4d96-a950-813a6972a350","listingId":"463b83f9-716b-4eec-ad06-9b610645d4ef","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/310/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":"2026-04-18T19:25:59.216Z"}],"sources":[{"listingId":"463b83f9-716b-4eec-ad06-9b610645d4ef","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/310/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:59.216Z","lastSeenAt":"2026-04-24T10:33:27.881Z"}],"details":{"listingId":"463b83f9-716b-4eec-ad06-9b610645d4ef","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/310/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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/transactions/310/receipt"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/310/receipt"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"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 310 via a single micropayment","Demonstrating x402 payment protocol integration for agent-to-API commerce","Accessing pay-per-request infrastructure without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing on-demand transaction receipts without subscription overhead","Projects requiring USDC-settled micropayment API access on Base"],"notFor":["Users needing detailed API documentation or response schema guarantees","High-volume batch retrieval where per-request pricing is inefficient","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.261Z"},"updatedAt":"2026-04-24T10:33:27.881Z"}}