{"id":"6df1ac63-4fe6-421c-bfc5-530fcdc1b8cc","shortId":"PNMRpw","kind":"x402","title":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","tagline":"Transaction receipt endpoint on Base, paid per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource at `/api/v1/transactions/169/receipt`. 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 settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint probed returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made via the x402 \"exact\" scheme to a designated wallet address. The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, 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 usage examples available. The specific behavior of the `/transactions/169/receipt` endpoint (what it returns, what input it expects) is not documented beyond the generic \"Premium API Access\" label. The platform appears live and functional based on the 402 challenge response, but the lack of documentation makes it difficult to assess the actual utility or data quality of this particular endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","transaction-receipt","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","pay-per-request API","Base network API","lowpaymentfee"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet'","No OpenAPI or schema definition for request or response payloads","The specific endpoint path includes a hardcoded transaction ID (169), suggesting it may be a demo or placeholder rather than a general-purpose API","Purpose and data returned by this endpoint are undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/169/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/169/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 402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, no examples, and the purpose of this specific endpoint (transaction 169 receipt) is unclear. The platform lists many endpoints but provides no detail on any of 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'/api/v1/transactions/169/receipt':37 '/docs':146 '/pricing':147 '/readme':150 '/transactions/169/receipt':182 '0.02':96,123 '000':91 '20':90 '402':83,210 '6':101 'Base network API' 'USDC micropayment API' 'access':199 'across':126 'actual':224 'address':117 'advertis':120 'ai/ml':58 'analyt':57 'api':54,131,198 'appear':203 'assess':222 'avail':176 'base':5,18,73,92,207 'base-network' 'behavior':179 'beyond':194 'broader':43 'call':9,22,104 'challeng':84,211 'commit':139 'connect':156 'content':162 'data':56,61,227 'decim':102 'design':115 'difficult':220 'document':141,171,193,217 'endpoint':3,16,28,79,128,183,232 'exact':111 'exampl':175 'expect':190 'extrem':143 'finance/web3':60 'flat':122 'function':206 'generic':196 'infer':59 'infrastructur':63 'input':188 'json-response' 'key':132 'label':200 'lack':215 'limit':135 'live':204 'lowpaymentfee' 'lowpaymentfee.com':30 'made':107 'make':218 'minimum':138 'network':74 'offer':46 'openapi':166 'page':151 'paid':6,19 'part':40 'particular':231 'pay':51 'pay-per-request':50 'pay-per-request API' 'payment':86,105 'per':8,21,52,103,124 'per-cal':7,20 'per-call-pricing' 'platform':44,119,202 'premium':197 'probe':80 'prompt':158 'protocol':70 'provid':31 'qualiti':228 'rate':134 'receipt':2,15,34 'render':153 'request':53,85,125 'request/response':169 'requir':140 'resourc':35 'respons':212 'return':81,186 'schema':170 'scheme':112 'settl':66 'sinc':98 'span':55 'spars':144 'spec':167 'specif':78,178 'transact':1,14,33 'transaction receipt API' 'transaction-receipt' 'unit':93 'usag':174 'usd':97 'usdc':13,26,76,95,99 'usdc-settlement' 'use':75,100 'util':64,225 'varieti':48 'via':10,23,67,108 'wallet':116,157 'x402':11,24,69,110 'x402 payment endpoint' 'x402-payment'","prices":[{"id":"e1c4439e-8310-4c9d-a221-a8d11dd38ee5","listingId":"6df1ac63-4fe6-421c-bfc5-530fcdc1b8cc","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/169/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":"2026-04-18T18:58:57.627Z"}],"sources":[{"listingId":"6df1ac63-4fe6-421c-bfc5-530fcdc1b8cc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/169/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:57.627Z","lastSeenAt":"2026-04-24T20:03:14.083Z"}],"details":{"listingId":"6df1ac63-4fe6-421c-bfc5-530fcdc1b8cc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/169/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 maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/169/receipt"},{"claim":"The 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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/169/receipt"}],"useCases":["Retrieving a transaction receipt for transaction ID 169 via a paid API call","Demonstrating x402 payment flow on Base with USDC","Integrating pay-per-call APIs without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Projects requiring low-cost per-request billing with no subscriptions"],"notFor":["Production use cases requiring documented request/response schemas","High-volume batch processing where per-call fees add up","Users who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.605Z"},"updatedAt":"2026-04-24T20:03:14.083Z"}}