{"id":"b4d99e24-d3aa-4aac-86ab-2e534b5c5ff6","shortId":"7EjtWw","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 49) 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 infrastructure utilities — all priced at $0.02 per call and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/49/receipt` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, requiring a maximum of 20,000 base-unit USDC (i.e., $0.02 given USDC's 6 decimals) paid to address `0x1A2B...85F3` on Base. No API keys or rate limits are advertised; access is granted purely via the x402 payment header.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's `outputSchema`, and no examples of what the receipt payload actually contains. The platform lists many other endpoints on its landing page, but details about each are limited to a name and price. Users should expect to experiment or contact the provider for specifics on the response format.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment endpoint"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content","The endpoint path references a specific transaction ID (49); it is unclear whether this is a generic pattern or a fixed resource","No information on error handling, response fields, or edge cases"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/49/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/49/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response examples, and all doc pages render only 'Connect wallet'. The specific purpose of this receipt endpoint is unclear beyond its URL 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'0.02':10,24,75,115 '000':109 '0x1a2b':124 '20':108 '49':40 '6':119 '85f3':125 'Base network API' 'USDC micropayment API' 'accept':90 'access':136 'actual':189 'address':123 'advertis':135 'ai/ml':65 'analyt':64 'api':61,129,151 'base':8,22,84,111,127 'base-network' 'base-unit':110 'behind':41 'beyond':175 'broader':50 'call':77 'challeng':98,178 'confirm':99 'connect':160 'contact':218 'contain':190 'content':166 'crypto payment endpoint' 'data':63,68 'decim':120 'detail':202 'doc':150 'document':145 'endpoint':6,20,30,88,101,196 'exampl':183 'expect':214 'experi':216 'extrem':147 'finance/web3':67 'format':226 'gate':3,17 'given':116 'grant':138 'header':144 'i.e':114 'id':39 'infer':66 'infrastructur':70 'json':95 'json-response' 'key':130 'land':199 'limit':133,206 'list':193 'live':103 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':194 'maximum':106 'name':209 'network':85 'no-api-key' 'offer':53 'openapi':170 'outputschema':180 'page':155,200 'paid':121 'part':47 'pay':9,23,58 'pay-per-call API' 'pay-per-request':57 'payload':188 'payment':143 'paywal':44 'per':13,27,59,76 'platform':51,192 'post':91 'price':73,152,211 'prompt':162 'provid':33,220 'pure':139 'rate':132 'readm':154 'receipt':5,19,36,187 'render':157 'request':14,28,60,92 'request/response':173 'requir':104 'resourc':37 'respons':225 'return':94 'schema':174 'settl':79 'span':62 'spars':148 'spec':171 'specif':87,222 'substant':165 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'unit':112 'usdc':12,26,81,113,117 'usdc-settlement' 'user':212 'util':71 'varieti':55 'via':140 'wallet':161 'x402':2,16,43,97,142,177 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"199a5032-ba7d-4113-804b-326bb0203d97","listingId":"b4d99e24-d3aa-4aac-86ab-2e534b5c5ff6","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/49/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":"2026-04-18T19:26:56.246Z"}],"sources":[{"listingId":"b4d99e24-d3aa-4aac-86ab-2e534b5c5ff6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/49/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:56.246Z","lastSeenAt":"2026-04-24T02:02:57.756Z"}],"details":{"listingId":"b4d99e24-d3aa-4aac-86ab-2e534b5c5ff6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/49/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":"The endpoint returns a 402 x402 challenge requiring 20000 base-unit USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/49/receipt"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/49/receipt"},{"claim":"Documentation, API, pricing, and README pages all render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction ID 49 via a single paid request","Demonstrating x402 payment-gated API access on Base","Integrating pay-per-request infrastructure into agent workflows without API key management"],"bestFor":["Developers exploring x402 protocol integrations","Agents that need keyless, pay-per-call API access on Base","Testing micropayment flows with USDC on Base"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Bulk retrieval of many transaction receipts (no batch endpoint documented)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:36.512Z"},"updatedAt":"2026-04-24T02:02:57.756Z"}}