{"id":"13a6b264-d2be-4272-998c-0c723b8cf7f6","shortId":"F4zj7k","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, priced at $0.02 per request in USDC.","tagline":"x402-gated transaction receipt endpoint on Base, priced at $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource via the x402 payment protocol. The specific path `/api/v1/transactions/42/receipt` returns a receipt for transaction ID 42 in JSON format, gated behind a per-request USDC micropayment on the Base network. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments of up to 20,000 base units of USDC (0.02 USD) per call, with a 300-second payment timeout.\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), 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 minimum commitments required. Payments settle in USDC on the Base L2 network.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the transaction receipt actually contains. The endpoint's specific purpose (returning a receipt for a hardcoded transaction ID 42) is unclear and may be a demo or placeholder rather than a production resource.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","transaction-receipt","per-request-billing","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 API","micropayment API","USDC payment endpoint","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content","No OpenAPI or schema available for request or response formats","The endpoint path contains a hardcoded transaction ID (42), suggesting it may be a demo or placeholder","No information on what the transaction receipt actually contains","The platform lists many API categories but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/42/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/42/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and network details, but documentation is essentially nonexistent (all doc pages show only 'Connect wallet'). No OpenAPI schema, no request/response examples, and the hardcoded transaction ID 42 in the path suggests this may be a demo endpoint rather than a general-purpose API. The broader platform lists many endpoints but provides no technical detail for any of 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'/api/v1/transactions/42/receipt':48 '/docs':184 '/pricing':186 '/readme':188 '0.02':11,26,94,155 '000':89 '20':88 '300':100 '42':55,233 'Base network API' 'USDC payment endpoint' 'accept':80 'actual':218 'advertis':108 'ai':124 'analysi':128 'analyt':118 'api':115,160 'base':8,23,69,90,176 'base-network' 'behind':60 'broader':105 'call':97 'challeng':73 'classif':131 'commit':168 'confirm':74 'connect':194 'contain':219 'convers':148 'data':117,121 'demo':240 'descript':212 'detail':201 'document':179 'embed':132 'endpoint':6,21,32,76,151,221 'estim':142 'exact':82 'exact-schem':81 'exampl':209 'exchang':137 'export':122 'extrem':181 'feed':136 'financ':133 'format':58 'gas':141 'gate':3,18,59,114 'generat':149 'geocod':146 'hardcod':230 'id':54,232 'infrastructur':144 'insight':123 'json':57 'json-response' 'key':161 'l2':177 'learn':126 'limit':164 'list':153 'live':78 'lowpaymentfee' 'lowpaymentfee.com':34,106 'machin':125 'may':237 'metric':119 'micropay':66 'micropayment API' 'minimum':167 'network':70,178 'no-api-key' 'openapi':205 'page':189 'path':47 'pay-per-call API' 'payment':43,84,102,170 'per':12,27,63,96,156 'per-request':62 'per-request-billing' 'placehold':242 'platform':107 'price':9,24,135 'product':246 'prompt':196 'protocol':44 'provid':35 'purpos':224 'quot':140 'rate':138,163 'rather':243 'receipt':5,20,38,51,217,227 'render':191 'report':120 'request':13,28,64,157 'request/response':208 'requir':169 'resourc':39,247 'return':49,225 'schema':206 'scheme':83 'second':101 'sentiment':127 'settl':171 'span':116 'spars':182 'specif':46,223 'suit':110 'summar':130 'technic':200 'text':129 'timeout':103 'token':139 'transact':4,19,37,53,216,231 'transaction receipt API' 'transaction-receipt' 'unclear':235 'unit':91 'usd':95 'usdc':15,30,65,93,173 'usdc-micropayment' 'util':145 'valid':147 'via':40 'wallet':195 'web3':134 'x402':2,17,42,72,113 'x402 API' 'x402-gated':1,16,112 'x402-payment'","prices":[{"id":"04b9a001-5366-484d-a667-3a137cb871bf","listingId":"13a6b264-d2be-4272-998c-0c723b8cf7f6","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/42/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":"2026-04-18T19:26:42.359Z"}],"sources":[{"listingId":"13a6b264-d2be-4272-998c-0c723b8cf7f6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/42/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:42.359Z","lastSeenAt":"2026-04-24T05:03:16.595Z"}],"details":{"listingId":"13a6b264-d2be-4272-998c-0c723b8cf7f6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/42/receipt\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with a valid USDC payment proof on Base to receive the receipt.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/transactions/42/receipt"},{"claim":"All endpoints are 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":"The platform advertises APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for a specific transaction ID via micropayment","Demonstrating x402 payment protocol integration on Base","Agent-initiated pay-per-call data retrieval without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-request API access","Testing micropayment flows on Base L2"],"notFor":["Production workloads requiring documented request/response schemas","Bulk transaction receipt retrieval (hardcoded transaction ID 42)","Users who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.164Z"},"updatedAt":"2026-04-24T05:03:16.595Z"}}