{"id":"e7569357-5498-492f-ba50-7682edd16de1","shortId":"a4aNM9","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt retrieval service accessible via the x402 payment protocol. It accepts POST requests and returns JSON responses. Payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals).\n\nThe endpoint is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced uniformly at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access, with all payments handled via x402 on-chain settlement.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no additional technical documentation. There is no OpenAPI spec, no request/response schema beyond the x402 challenge metadata, and no examples of what the receipt endpoint actually returns. The specific endpoint path (`/api/v1/transactions/23/receipt`) suggests it retrieves a receipt for transaction ID 23, but the exact payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 api","pay-per-request","base usdc","micropayment api","lowpaymentfee"],"warnings":["No API documentation available—all doc pages show only 'Connect wallet'","No OpenAPI or request/response schema provided","Unclear what data the /transactions/23/receipt endpoint actually returns","No examples of successful responses available","The endpoint path contains a hardcoded ID (23), unclear if parameterized"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/23/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/23/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and no OpenAPI spec. The docs pages are empty wallet-connect prompts. This is effectively a stub 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'/api/v1/transactions/23/receipt':182 '/docs':137 '/pricing':139 '/readme':141 '/request':13,28 '0.02':12,27,70,107 '000':74 '20':73 '23':191 '6':78 'accept':48 'access':41,121 'actual':176 'addit':152 'advertis':112 'ai':95 'analyt':94 'api':90,114 'base':9,24,60,75 'base usdc' 'base-network' 'beyond':163 'broader':86 'call':4,19 'categori':91 'chain':130 'challeng':166 'coin':65 'connect':147 'cost':68 'data':93 'decim':79 'document':132,154 'endpoint':7,22,32,81,175,180 'exact':194 'exampl':170 'extrem':134 'financ':98 'handl':125 'id':190 'includ':92 'infrastructur':101 'instant':120 'json':53 'key':115 'learn':97 'limit':118 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':96 'metadata':167 'micropayment api' 'multipl':89 'network':61 'no-api-key' 'offer':88 'on-chain':128 'openapi':158 'page':142 'part':83 'path':181 'pay':2,17 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request' 'payload':195 'payment':45,55,124 'payment receipt' 'per':3,18,71,108 'platform':87,111 'post':49 'price':104 'prompt':149 'protocol':46 'provid':35 'rate':117 'receipt':6,21,38,174,187 'render':144 'request':50,72,109 'request/response':161 'respons':54 'retriev':39,185 'return':52,177 'schema':162 'servic':40 'settl':57 'settlement':131 'spars':135 'spec':159 'specif':179 'structur':196 'suggest':183 'technic':153 'transact':5,20,37,189 'transaction receipt' 'transaction-receipt' 'uniform':105 'unit':76 'unknown':198 'usd':64 'usdc':15,30,63 'usdc-settlement' 'use':62 'util':102 'via':10,25,42,126 'wallet':148 'web3':99 'x402':11,26,44,127,165 'x402 api' 'x402-payment'","prices":[{"id":"84c1d029-536c-4807-a937-166776e7d810","listingId":"e7569357-5498-492f-ba50-7682edd16de1","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/23/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":"2026-04-18T18:59:29.408Z"}],"sources":[{"listingId":"e7569357-5498-492f-ba50-7682edd16de1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/23/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:29.408Z","lastSeenAt":"2026-04-24T16:03:18.310Z"}],"details":{"listingId":"e7569357-5498-492f-ba50-7682edd16de1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/23/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 USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/23/receipt"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/23/receipt"},{"claim":"Payment recipient address: 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/transactions/23/receipt"}],"useCases":["Retrieving transaction receipts programmatically with per-call payment","Integrating pay-as-you-go API access without managing API keys","Agents autonomously purchasing transaction data on-chain"],"bestFor":["Developers wanting keyless API access with crypto micropayments","AI agents that can settle x402 payments on Base","Users needing single transaction receipts without subscription commitments"],"notFor":["Users who need bulk transaction data at scale (no documented batch endpoint)","Developers requiring detailed API documentation or SDKs","Users without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.06Z"},"updatedAt":"2026-04-24T16:03:18.310Z"}}