{"id":"884ed1ef-2a15-4fa3-94a5-ef1b8e988cf8","shortId":"9eS6RZ","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service behind an x402 paywall. It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/transactions/274/receipt` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The x402 challenge confirms the endpoint is live and uses the \"exact\" payment scheme with a 300-second timeout.\n\nThe platform's documentation pages are sparse—most routes simply show a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what the receipt object contains. The endpoint path suggests it retrieves a receipt for a specific transaction (ID 274), but it is unclear whether this is a fixed resource or a parameterized pattern.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","USDC micropayment","Base network API","pay-per-request","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available","All documentation pages return only 'Connect wallet' with no technical content","Unclear what the receipt response body contains","Endpoint path includes a hardcoded transaction ID (274); unclear if this is parameterized or fixed","Platform appears to be a demo or early-stage service with minimal real documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/274/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/274/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 via a valid 402 challenge with clear pricing and network details, but there is no OpenAPI spec, no documentation of request/response schemas, and the docs pages are empty. The specific purpose of this receipt endpoint is 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'0.02':12,28,72,116 '000':112 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':106 '20':111 '274':192 '300':138 '6':120 'Base network API' 'USDC micropayment' 'accept':90 'ai':61 'analyt':60 'api':56,77 'base':9,25,101,113 'base-network' 'behind':43 'broader':52 'call':4,20 'categori':57 'challeng':124 'commit':84 'confirm':125 'connect':153 'contain':178 'contract':105 'cost':109 'data':59 'decim':121 'descript':172 'detail':160 'document':144 'endpoint':7,23,34,88,127,180 'exact':133 'exampl':167 'financ':64 'fix':201 'given':117 'i.e':115 'id':191 'includ':58 'infrastructur':67 'json':95 'json-response' 'key':78 'learn':63 'limit':81 'live':129 'lowpaymentfee' 'lowpaymentfee.com':36 'machin':62 'multipl':55 'network':102 'no-api-key' 'object':177 'offer':54 'openapi':164 'page':145 'parameter':205 'part':49 'path':181 'pattern':206 'pay':2,18 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request' 'payload':169 'payment':96,134 'payment receipt' 'paywal':46 'per':3,13,19,29,73 'platform':53,142 'post':91 'price':70 'prompt':155 'provid':37 'rate':80 'receipt':6,22,40,176,186 'request':14,30,74,92 'request/response':168 'requir':85 'resourc':202 'retriev':41,184 'return':94 'rout':149 'scheme':135 'second':139 'servic':42 'settl':98 'show':151 'simpli':150 'spars':147 'spec':165 'specif':87,189 'suggest':182 'technic':159 'timeout':140 'transact':5,21,39,190 'transaction receipt' 'transaction-receipt' 'unclear':196 'unit':114 'usdc':16,32,104,118 'usdc-settlement' 'use':103,131 'util':68 'via':10,26 'wallet':154 'web3':65 'whether':197 'x402':11,27,45,123 'x402 API' 'x402-payment'","prices":[{"id":"e8ba1fbd-b406-4125-94f1-2372af1e607c","listingId":"884ed1ef-2a15-4fa3-94a5-ef1b8e988cf8","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/274/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":"2026-04-18T18:59:51.601Z"}],"sources":[{"listingId":"884ed1ef-2a15-4fa3-94a5-ef1b8e988cf8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/274/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:51.601Z","lastSeenAt":"2026-04-24T13:32:37.076Z"}],"details":{"listingId":"884ed1ef-2a15-4fa3-94a5-ef1b8e988cf8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/274/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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/274/receipt"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/274/receipt"}],"useCases":["Retrieving a transaction receipt after a payment event","Programmatic verification of transaction completion","Agent-driven workflows that need proof-of-payment documents"],"bestFor":["Agents needing instant access without API key registration","Low-volume, pay-as-you-go transaction verification","Crypto-native workflows on Base L2"],"notFor":["High-volume batch processing where per-call fees add up","Users who need detailed API documentation before integrating","Non-crypto users without a Base-compatible wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.113Z"},"updatedAt":"2026-04-24T13:32:37.076Z"}}