{"id":"bc5ec20b-f234-4d33-a1fc-dde2eee54778","shortId":"6dr55w","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 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 settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/45/receipt` returns a JSON response upon payment. The x402 challenge confirms it accepts exact-scheme payments of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is granted immediately upon valid payment. The platform emphasizes low fees and simplicity—pay only for what you use with no minimums or commitments.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the receipt payload actually contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data is returned or what request body (if any) is expected.","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","USDC micropayment","Base network API","pay-per-request","lowpaymentfee"],"warnings":["No OpenAPI spec or schema documentation available","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","No response schema or example provided—unclear what data the receipt contains","The endpoint path includes a hardcoded transaction ID (45), suggesting it may be a demo or single-resource endpoint"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/45/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/45/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, but documentation is essentially nonexistent—no request/response schemas, no examples, and all doc pages show only 'Connect wallet'. The purpose of this specific receipt endpoint is unclear beyond its 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'/request':13,28 '0.02':12,27,72,117 '000':106 '0x8335':111 '20':105 '2913':112 '402':205 '6':121 'Base network API' 'USDC micropayment' 'accept':97 'access':41,131 'actual':196 'addit':176 'advertis':130 'ai':61 'analyt':60 'api':56,124,162 'base':9,24,80,107,114 'base-network' 'bodi':224 'broader':52 'call':4,19 'categori':57 'challeng':94,206 'commit':155 'confirm':95 'connect':171 'contain':197 'data':59,218 'decim':122 'detail':178 'difficult':214 'doc':161 'document':156,187,211 'emphas':140 'endpoint':7,22,32,84,199 'equal':116 'exact':99 'exact-schem':98 'exampl':190 'expect':228 'extrem':158 'fee':142 'financ':64 'given':118 'grant':133 'immedi':134 'includ':58 'infrastructur':67 'json':88 'key':125 'know':216 'lack':209 'learn':63 'limit':128 'live':201 'low':141 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'make':212 'minimum':153 'multipl':55 'network':81 'no-api-key' 'offer':54 'openapi':182 'page':166 'part':49 'pay':2,17,145 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request' 'payload':195 'payment':45,91,101,137 'payment receipt' 'per':3,18,73 'platform':53,139 'price':70,163 'prompt':173 'proper':204 'protocol':46 'provid':35 'rate':127 'readm':165 'receipt':6,21,38,194 'render':168 'request':74,223 'request/response':185 'respons':89 'retriev':39 'return':86,202,220 'schema':186 'scheme':100 'servic':40 'settl':75 'simplic':144 'spars':159 'spec':183 'specif':83 'technic':177 'transact':5,20,37 'transaction receipt' 'transaction-receipt' 'unit':108 'upon':90,135 'usdc':15,30,77,110,119 'usdc-settlement' 'use':150 'util':68 'valid':136 'via':10,25,42 'wallet':172 'web3':65 'x402':11,26,44,93 'x402 API' 'x402-payment'","prices":[{"id":"1c2d4db3-f333-477d-87ea-137c7f722297","listingId":"bc5ec20b-f234-4d33-a1fc-dde2eee54778","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/45/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":"2026-04-18T19:26:45.415Z"}],"sources":[{"listingId":"bc5ec20b-f234-4d33-a1fc-dde2eee54778","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/45/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:45.415Z","lastSeenAt":"2026-04-24T04:04:20.073Z"}],"details":{"listingId":"bc5ec20b-f234-4d33-a1fc-dde2eee54778","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/45/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, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/transactions/45/receipt"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/45/receipt"}],"useCases":["Retrieving a transaction receipt for a specific transaction ID","Programmatic proof-of-payment retrieval for accounting or auditing","Agent-driven workflows that need verifiable transaction records"],"bestFor":["Developers wanting keyless, pay-per-call API access","Agents that can settle USDC payments on Base L2","Use cases requiring no subscription or rate-limit constraints"],"notFor":["Users needing detailed API documentation or SDKs before integrating","High-volume batch processing where per-call pricing may add up","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.01Z"},"updatedAt":"2026-04-24T04:04:20.073Z"}}