{"id":"8d40eb2f-4797-4ea8-a109-fe09c9460b83","shortId":"bcC4LX","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 access to a transaction receipt resource (transaction ID 79) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and crypto market data, and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no commitments — payment is handled entirely via x402 on Base.\n\nHowever, this specific endpoint (/api/v1/transactions/79/receipt) is a single transaction receipt resource rather than one of the general-purpose APIs listed on the homepage. There is no OpenAPI schema, no documentation beyond the landing page, and the docs/pricing/API pages all render only a \"Connect wallet\" prompt with no further content. The actual response payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","USDC micropayment","Base network API","pay-per-call","lowpaymentfee"],"warnings":["No OpenAPI or response schema available — response payload structure is unknown","Documentation pages (/docs, /pricing, /api, /README) all render only 'Connect wallet' with no content","This endpoint serves a single transaction receipt (ID 79); it is unclear if other transaction IDs are available","The advertised suite of APIs (analytics, AI, finance, utils) are separate endpoints not covered by this listing","No rate limit or SLA information provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/79/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/79/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 (returns 402 with a valid x402 challenge), but there is no OpenAPI schema, no documentation, no example responses, and the docs/pricing pages are empty beyond a wallet-connect prompt. The specific resource (/transactions/79/receipt) is narrow and not listed among the advertised APIs. Effectively a stub with minimal verifiable 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'0.02':87,132 '000':80 '0x8335':65 '20':79 '2913':66 '6':90 '79':42 'Base network API' 'USDC micropayment' 'accept':49 'access':34 'actual':204 'advertis':96 'ai/ml':108 'amount':74 'analysi':111 'analyt':107 'api':104,137,172 'base':8,22,60,81,152 'base-network' 'behind':43 'beyond':184 'broader':93 'call':12,26,77 'classif':113 'commit':144 'connect':196 'content':202 'contract':64 'convers':125 'crypto':117 'data':106,119 'decim':91 'docs/pricing/api':190 'document':183 'embed':114 'endpoint':6,20,30,48,128,156 'entir':148 'equal':86 'exact':70 'financ':115 'gate':3,17 'general':170 'general-purpos':169 'generat':126 'geocod':123 'handl':147 'homepag':176 'howev':153 'id':41 'infer':109 'infrastructur':121 'json':54 'json-response' 'key':138 'land':186 'limit':141 'list':130,173 'lowpaymentfee' 'lowpaymentfee.com':32,94 'market':118 'maximum':73 'network':61 'no-api-key' 'one':166 'openapi':180 'page':187,191 'paid':9,23 'pay':101 'pay-per-call' 'pay-per-request':100 'payload':206 'payment':55,145 'payment receipt' 'paywal':46 'per':11,25,76,102,133 'per-cal':10,24 'platform':95 'post':50 'prompt':198 'provid':33 'purpos':171 'rate':140 'rather':164 'receipt':5,19,38,162 'render':193 'request':51,103,134 'requir':75 'resourc':39,163 'respons':205 'return':53 'schema':181 'scheme':71 'sentiment':110 'settl':57 'singl':160 'span':105 'specif':155 'structur':207 'suit':98 'summar':112 'transact':4,18,37,40,161 'transaction receipt' 'transaction-receipt' 'unit':82 'unknown':209 'usdc':14,28,63,84,88 'usdc-settlement' 'use':62,89 'util':122 'valid':124 'via':67,149 'wallet':197 'x402':2,16,45,69,150 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"c0d0c687-1dca-447f-a450-c77187785841","listingId":"8d40eb2f-4797-4ea8-a109-fe09c9460b83","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/79/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":"2026-04-18T19:27:10.633Z"}],"sources":[{"listingId":"8d40eb2f-4797-4ea8-a109-fe09c9460b83","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/79/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:10.633Z","lastSeenAt":"2026-04-24T13:03:20.567Z"}],"details":{"listingId":"8d40eb2f-4797-4ea8-a109-fe09c9460b83","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/79/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 challenge with x402Version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/79/receipt"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals), equaling $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/transactions/79/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 contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/79/receipt"}],"useCases":["Retrieving a receipt for transaction #79 via a single paid API call","Demonstrating x402 payment flow on Base with USDC","Agent-driven purchase of on-demand transaction data without API key management"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need to fetch transaction receipts programmatically","Use cases requiring keyless, pay-per-request API access"],"notFor":["Bulk retrieval of many transaction receipts (only one resource ID exposed)","Users who need detailed API documentation or response schema guarantees","Production workloads requiring SLA or rate-limit guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:35.859Z"},"updatedAt":"2026-04-24T13:03:20.567Z"}}