{"id":"a37ee246-8ba3-4e9a-af86-31182a0fbdcd","shortId":"PcfDAe","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 a transaction receipt resource (transaction ID 113) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per call, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/113/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout. No API keys or rate limits are advertised; access is purely gated by micropayment.\n\nThe platform's landing page lists 16 endpoints across four categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), all at the same $0.02 price point. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail, so the actual request/response schemas for this receipt endpoint are unknown. The endpoint is live and returning a proper 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment endpoint","USDC pay-per-call","Base network API","lowpaymentfee","receipt lookup","payment-gated API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","All documentation pages beyond the landing page return only 'Connect wallet' — no technical details","The purpose and response format of the /transactions/113/receipt endpoint are not documented","The broader platform lists 16 endpoints but none have documented request/response schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/113/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/113/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 402 challenge, confirming it works. However, there is no OpenAPI schema, no documentation beyond a landing page, no request/response examples, and the specific purpose of this 'transaction receipt' endpoint is unclear. The docs, pricing, and README pages all returned only 'Connect wallet' with no 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'0.02':10,24,75,134,187 '000':123 '0x8335':128 '113':40 '16':170 '20':122 '2913':129 '300':147 '402':226 '6':138 'Base network API' 'USDC pay-per-call' 'accept':89 'access':158 'across':172 'actual':209 'advertis':117,157 'ai':177 'ai/ml':65 'amount':120 'analyt':64,176 'api':61,151 'base':8,22,83,124,131 'base-network' 'behind':41 'beyond':192 'broader':50 'call':77 'caller':102 'categori':174 'challeng':116,227 'connect':199 'data':63,68,175 'decim':139 'detail':206 'document':190 'endpoint':6,20,30,87,171,215,219 'equal':133 'exact':144 'financ':180 'finance/web3':67 'four':173 'gate':3,17,161 'given':135 'handl':97 'header':109 'id':39 'includ':104 'infer':66 'infrastructur':182 'json':94 'json-response' 'key':152 'land':167,194 'learn':179 'limit':155 'list':169 'live':221 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':178 'max':119 'micropay':163 'must':103 'network':84 'no-api-key' 'offer':53 'page':168,191,195 'part':47 'pay':9,23,58 'pay-per-request':57 'payment':95,108,113,141 'payment-gated API' 'paywal':44 'per':13,27,59,76 'platform':51,165 'point':189 'post':90 'price':73,188 'prompt':201 'proof':114 'proper':225 'protocol':101 'provid':33 'pure':160 'rate':154 'receipt':5,19,36,214 'receipt lookup' 'request':14,28,60,91 'request/response':210 'resourc':37 'return':93,196,223 'schema':211 'scheme':142 'second':148 'servic':71 'settl':78 'span':62 'specif':86 'technic':205 'timeout':149 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'unit':125 'unknown':217 'usdc':12,26,80,127,136 'usdc-micropayment' 'util':70 'valid':112 'varieti':55 'via':98 'wallet':200 'web3':181 'x':107 'x-payment':106 'x402':2,16,43,100 'x402 micropayment endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"01a13385-2795-4ffb-843e-601375d194de","listingId":"a37ee246-8ba3-4e9a-af86-31182a0fbdcd","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/113/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":"2026-04-18T18:58:11.305Z"}],"sources":[{"listingId":"a37ee246-8ba3-4e9a-af86-31182a0fbdcd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/113/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:11.305Z","lastSeenAt":"2026-04-25T03:03:29.879Z"}],"details":{"listingId":"a37ee246-8ba3-4e9a-af86-31182a0fbdcd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/113/receipt \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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 endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/113/receipt"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/113/receipt"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"16 endpoints listed across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 113 via micropayment","Demonstrating x402 protocol integration for pay-per-request APIs","Programmatic access to receipt data without API key management"],"bestFor":["Developers experimenting with x402 micropayment protocol","Agents that need on-demand receipt retrieval without subscription overhead","Applications requiring keyless, pay-as-you-go API access on Base"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need detailed API documentation or OpenAPI schemas before integrating","Applications requiring non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.737Z"},"updatedAt":"2026-04-25T03:03:29.879Z"}}