{"id":"9574a7f5-a0de-4b94-8068-b213faa7b035","shortId":"5ARYUe","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 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 call. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to authenticate each request.\n\nDocumentation is extremely sparse—the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The specific endpoint path `/api/v1/transactions/343/receipt` suggests it returns a receipt for transaction ID 343, but the exact request body format and response structure are 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","USDC micropayment","Base network API","lowpaymentfee"],"warnings":["No API documentation available—all doc pages render only 'Connect wallet'","No OpenAPI or schema describing request/response formats","The endpoint path references a specific transaction ID (343), which may be a demo or placeholder rather than a general-purpose endpoint","Platform legitimacy and reliability are unverifiable from available materials"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/343/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/343/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 (returns a valid 402 challenge) and pricing is clear, but there is no documentation, no OpenAPI spec, no request/response examples, and the docs pages are empty. The specific purpose of this particular endpoint (transaction 343 receipt) is unclear and may be a 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'/api/v1/transactions/343/receipt':176 '/docs':140 '/pricing':142 '/readme':144 '0.02':12,28,72,109 '000':76 '20':75 '343':185 '6':80 'Base network API' 'USDC micropayment' 'accept':50 'access':43,123 'advertis':114 'ai':97 'analyt':96 'api':92,116 'attach':126 'authent':132 'avail':171 'base':9,25,62,77 'base-network' 'bodi':190 'broader':88 'call':4,20,111 'caller':124 'categori':93 'coin':67 'connect':150 'cost':70 'data':95 'decim':81 'detail':157 'document':135,166 'endpoint':7,23,34,83,174 'exact':188 'exampl':169 'extrem':137 'financ':100 'format':191 'header':130 'id':184 'includ':94 'infrastructur':103 'instant':122 'json':55 'key':117 'learn':99 'limit':120 'lowpaymentfee' 'lowpaymentfee.com':36 'machin':98 'multipl':91 'network':63 'no-api-key' 'offer':90 'openapi':161 'page':145 'part':85 'path':175 'pay':2,18 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request' 'payload':170 'payment':47,57,129 'payment receipt' 'per':3,13,19,29,73,110 'platform':89,113 'post':51 'price':106 'prompt':152 'protocol':48 'provid':37 'rate':119 'receipt':6,22,40,181 'render':147 'request':14,30,52,74,134,189 'request/response':164 'respons':56,193 'retriev':41 'return':54,179 'schema':165 'servic':42 'settl':59 'simpli':125 'spars':138 'spec':162 'specif':173 'structur':194 'suggest':177 'technic':156 'transact':5,21,39,183 'transaction receipt' 'transaction-receipt' 'uniform':107 'unit':78 'unknown':196 'usd':66 'usdc':16,32,65 'usdc-settlement' 'use':64 'util':104 'via':10,26,44 'wallet':151 'web3':101 'x402':11,27,46,128 'x402 api' 'x402-payment'","prices":[{"id":"d2273323-bd8c-469b-8afb-d0902c87439c","listingId":"9574a7f5-a0de-4b94-8068-b213faa7b035","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/343/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":"2026-04-18T19:26:18.032Z"}],"sources":[{"listingId":"9574a7f5-a0de-4b94-8068-b213faa7b035","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/343/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:18.032Z","lastSeenAt":"2026-04-24T07:32:36.632Z"}],"details":{"listingId":"9574a7f5-a0de-4b94-8068-b213faa7b035","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/343/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 accepting USDC on Base network at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/transactions/343/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":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/343/receipt"}],"useCases":["Retrieving transaction receipts programmatically without API key management","Paying per-call for on-demand financial data access","Integrating x402 payment flows into agent-based workflows"],"bestFor":["Agents needing keyless, pay-as-you-go API access","Developers experimenting with x402 payment protocol on Base","Low-volume callers who want no subscription commitments"],"notFor":["High-volume batch processing where per-call fees add up quickly","Users who need detailed API documentation or SDKs before integrating","Applications requiring guaranteed SLAs or support contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.301Z"},"updatedAt":"2026-04-24T07:32:36.632Z"}}