{"id":"b62f90dd-d137-410b-bf82-ce43903b124d","shortId":"JzFQ9M","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides a \"Premium API Access\" receipt for transaction ID 91. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/91/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) to the payee address `0x1A2B...85F3` on Base. No API keys, rate limits, or upfront commitments are required — access is instant once payment is included.\n\nDocumentation on the site 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 (sentiment analysis, summarization, embeddings, price feeds, gas estimates, geocoding, etc.) at the same $0.02 price point, but none have documented schemas either. Treat this listing as a stub until richer documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee","402 payment required"],"warnings":["No OpenAPI or schema documentation available — request body and response format are unknown.","All non-homepage pages (docs, API, pricing, README) render only 'Connect wallet' with no content.","The endpoint path includes a hardcoded transaction ID (91); it is unclear whether this is parameterized or fixed.","The broader platform lists many endpoints (AI, finance, utils) but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/91/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/91/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this receipt endpoint is unexplained. Effectively a 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'/request':17,34 '0.02':16,33,81,129,228 '000':125 '0x1a2b':139 '20':124 '402 payment required' '6':133 '85f3':140 '91':51 'Base network API' 'USDC micropayment API' 'accept':96 'access':46,153 'actual':207 'address':138 'ai/ml':71 'analysi':216 'analyt':70 'api':45,66,144,169 'attach':110 'avail':247 'base':9,26,90,126,142 'base-network' 'becom':246 'beyond':193 'broader':57 'call':4,21,65 'caller':109 'challeng':196 'commit':150 'connect':178 'contain':116,208 'content':184 'data':69,74 'decim':134 'doc':168 'document':160,234,245 'dozen':60 'either':236 'embed':218 'enabl':38 'endpoint':7,24,39,67,94,214 'estim':222 'etc':224 'exampl':201 'extrem':165 'feed':220 'finance/web3':73 'gas':221 'geocod':223 'given':130 'handl':104 'header':115 'i.e':128 'id':50 'includ':159 'infer':72 'infrastructur':76 'instant':155 'json':101 'json-response' 'key':145 'limit':147 'list':211,239 'lowpaymentfee' 'lowpaymentfee.com':41 'mani':212 'network':91 'no-api-key' 'none':232 'offer':59 'openapi':188 'outputschema':198 'page':173 'part':54 'pay':2,19,63 'pay-per-cal':1,18,62 'pay-per-call' 'pay-per-request API' 'paye':137 'payload':206 'payment':102,114,120,157 'per':3,20,64,82 'platform':58,210 'point':230 'post':97 'premium':44 'price':79,170,219,229 'prompt':180 'protocol':108 'provid':42 'rate':146 'readm':172 'receipt':6,23,47,205 'render':175 'request':83,98 'request/response':191 'requir':152 'return':100 'richer':244 'schema':192,235 'sentiment':215 'settl':12,29,85 'sign':118 'site':163 'span':68 'spars':166 'spec':189 'specif':93 'stub':242 'substant':183 'summar':217 'transact':5,22,49 'transaction receipt API' 'transaction-receipt' 'treat':237 'unit':127 'upfront':149 'usdc':14,31,87,119,131 'usdc-settlement' 'util':77 'via':10,27,105 'wallet':179 'x':113 'x-payment':112 'x402':11,28,37,107,195 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"f5ad58d2-57bf-46c6-b59d-e62d84c78aaf","listingId":"b62f90dd-d137-410b-bf82-ce43903b124d","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/91/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":"2026-04-18T19:27:15.480Z"}],"sources":[{"listingId":"b62f90dd-d137-410b-bf82-ce43903b124d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/91/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:15.480Z","lastSeenAt":"2026-04-23T23:03:17.282Z"}],"details":{"listingId":"b62f90dd-d137-410b-bf82-ce43903b124d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/91/receipt \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\" \\\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 requesting up to 20,000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/transactions/91/receipt"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/transactions/91/receipt"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 91 via a single paid API call","Demonstrating x402 pay-per-call integration on the Base network","Programmatic receipt fetching without API key management"],"bestFor":["Developers experimenting with x402 protocol payments","Agents that need on-demand, keyless API access settled in USDC","Projects requiring Base-network micropayment integration examples"],"notFor":["Production workloads requiring well-documented request/response schemas","Bulk or high-volume receipt retrieval (no batch endpoint documented)","Users who need fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:35.633Z"},"updatedAt":"2026-04-23T23:03:17.282Z"}}