{"id":"1edbfeac-dfef-4633-9373-7bd938e0a3f4","shortId":"5vXrMr","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","tagline":"x402-gated transaction receipt endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 92) behind an x402 paywall. The broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments.\n\nThe specific endpoint probed — `/api/v1/transactions/92/receipt` — returns a valid x402 challenge (version 1, scheme \"exact\") requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the site's advertised pricing. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nDocumentation is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual data returned by this receipt endpoint after payment is unknown from the crawled material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","transaction-receipt","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto payment gateway"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition; request body and response structure are completely unknown","The specific endpoint path (/api/v1/transactions/92/receipt) appears to be a single hardcoded transaction ID rather than a parameterized resource","The broader platform advertises many endpoints but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/92/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/92/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty stubs. The specific purpose of this 'transaction 92 receipt' endpoint is 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'0.02':90,146 '000':129 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':161 '0x8335':134 '1':122 '20':128 '2913':135 '300':164 '6':141 '92':40 'Base network API' 'USDC micropayment API' 'accept':169 'actual':212 'address':160 'advertis':49,154 'ai/ml':61 'analysi':64 'analyt':60 'api':57,102,181 'application/json':174 'avail':210 'base':8,22,98,130,137 'base-network' 'behind':41 'broader':46 'call':12,26,148 'challeng':120 'classif':66 'commit':110 'connect':190 'consist':149 'content':196 'convers':83 'crawl':225 'crypto payment gateway' 'data':59,69,213 'decim':142 'doc':180 'document':175,205 'embed':67 'endpoint':6,20,30,86,113,168,218 'estim':77 'exact':124 'exampl':208 'exchang':72 'extrem':177 'feed':71 'finance/web3':68 'gas':76 'gate':3,17 'generat':84 'geocod':81 'id':39 'infer':62 'infrastructur':79 'json-response' 'key':103 'limit':106 'lowpaymentfee' 'lowpaymentfee.com':32,47 'materi':226 'minimum':109 'network':99 'openapi':200 'page':185 'paid':9,23 'pay':54 'pay-per-call API' 'pay-per-request':53 'payload':209 'payment':156,220 'paywal':44 'per':11,25,55,91,147 'per-cal':10,24 'per-request-pricing' 'platform':48 'post':170 'post-method' 'price':70,88,155,182 'probe':114 'prompt':192 'provid':33 'quot':75 'rate':73,105 'readm':184 'receipt':5,19,36,217 'render':187 'request':56,92,125,171 'request/response':203 'resourc':37 'return':116,173,214 'schema':204 'scheme':123 'second':165 'sent':158 'sentiment':63 'settl':93 'sinc':138 'site':152 'span':58 'spec':201 'specif':112 'suit':51 'summar':65 'thin':178 'timeout':166 'token':74 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'translat':144 'unit':131 'unknown':222 'usdc':14,28,95,133,139 'usdc-settlement' 'use':140 'util':80 'valid':82,118 'version':121 'wallet':191 'x402':2,16,43,119 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d47323db-c76a-4e36-8a83-02edacf085f7","listingId":"1edbfeac-dfef-4633-9373-7bd938e0a3f4","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/92/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":"2026-04-18T19:27:11.874Z"}],"sources":[{"listingId":"1edbfeac-dfef-4633-9373-7bd938e0a3f4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/92/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:11.874Z","lastSeenAt":"2026-04-24T00:32:40.416Z"}],"details":{"listingId":"1edbfeac-dfef-4633-9373-7bd938e0a3f4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/92/receipt\n# Returns 402 with x402 challenge; include X-PAYMENT header with signed USDC payment to complete request.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge requests maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/92/receipt"},{"claim":"Platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving transaction receipts via micropayment-gated API calls","Programmatic access to paid data endpoints without API key management","Agent-driven workflows that need on-demand paid resource access on Base"],"bestFor":["Developers experimenting with x402 payment protocol integrations","Agents that can settle USDC payments on Base for per-call API access","Use cases requiring no-signup, no-API-key access to paid endpoints"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or subscription plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:35.752Z"},"updatedAt":"2026-04-24T00:32:40.416Z"}}