{"id":"372c5321-d9b8-468e-8b46-f99cb0557463","shortId":"UR9JUW","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 specific transaction receipt (transaction ID 283) 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 (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/283/receipt) returned a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335… on Base, 6 decimals), which equals $0.02. Payment is made via the x402 \"exact\" scheme to the specified payTo address. The endpoint accepts POST requests and returns application/json. Documentation pages (docs, pricing, README) appear to be behind a wallet-connect gate and contain no substantive content.\n\nWhile the platform lists many endpoints, this particular listing covers only the transaction receipt resource. No OpenAPI schema, request/response examples, or detailed documentation were available from the crawl. The actual data returned by this receipt endpoint is unknown — it could be a blockchain transaction receipt, a payment confirmation, or something else entirely. Prospective callers should be aware that the endpoint's purpose is inferred solely from its URL path.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","transaction-receipt","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","pay-per-call API","USDC micropayment","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","Documentation, pricing, and README pages are gated behind wallet-connect and contain no content","The specific data returned by /api/v1/transactions/283/receipt is unknown — purpose inferred only from URL path","This endpoint serves a single hardcoded transaction ID (283); unclear if other IDs are available at similar paths"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/283/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/283/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documentation, no request/response examples, and the actual purpose of this specific receipt endpoint is unclear. The broader platform lists many APIs but docs pages are empty behind a wallet 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'0.02':92,140 '000':128 '0x8335':133 '20':127 '283':42 '6':136 'Base network API' 'USDC micropayment' 'accept':156 'access':34 'actual':210 'address':153 'advertis':51 'ai/ml':63 'analysi':66 'analyt':62 'api':59,104 'appear':167 'application/json':161 'avail':205 'awar':237 'base':8,22,100,129,135 'base-network' 'behind':43,170 'blockchain':223 'broader':48 'call':12,26 'caller':234 'challeng':122 'classif':68 'commit':112 'confirm':228 'connect':174 'contain':177 'content':180 'convers':85 'could':220 'cover':190 'crawl':208 'data':61,211 'decim':137 'detail':202 'doc':164 'document':162,203 'els':231 'embed':69 'endpoint':6,20,30,88,115,155,186,216,240 'entir':232 'equal':139 'estim':79 'exact':147 'exampl':200 'exchang':74 'feed':73 'financ':70 'gas':78 'gate':3,17,175 'generat':86 'geocod':83 'id':41 'infer':64,244 'infrastructur':81 'json-response' 'key':105 'limit':108 'list':184,189 'lowpaymentfee' 'lowpaymentfee.com':32,49 'made':143 'mani':185 'maxamountrequir':125 'minimum':111 'network':101 'no-api-key' 'openapi':197 'page':163 'paid':9,23 'particular':188 'path':249 'pay':56 'pay-per-call API' 'pay-per-request':55 'payment':141,227 'payment receipt' 'payto':152 'paywal':46 'per':11,25,57,93 'per-cal':10,24 'per-call-pricing' 'platform':50,183 'post':157 'price':72,90,165 'probe':116 'prospect':233 'provid':33 'purpos':242 'quot':77 'rate':75,107 'readm':166 'receipt':5,19,39,194,215,225 'request':58,94,158 'request/response':199 'resourc':195 'return':118,160,212 'schema':198 'scheme':148 'sentiment':65 'settl':95 'sole':245 'someth':230 'span':60 'specif':37,114 'specifi':151 'substant':179 'suit':53 'summar':67 'token':76 'transact':4,18,38,40,193,224 'transaction receipt' 'transaction-receipt' 'unit':130 'unknown':218 'url':248 'usdc':14,28,97,132 'usdc-settlement' 'util':82 'valid':84,120 'via':144 'wallet':173 'wallet-connect':172 'web3':71 'x402':2,16,45,121,146 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"142fab87-4fee-4adc-a984-97c32182658c","listingId":"372c5321-d9b8-468e-8b46-f99cb0557463","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/283/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":"2026-04-18T19:25:47.134Z"}],"sources":[{"listingId":"372c5321-d9b8-468e-8b46-f99cb0557463","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/283/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:47.134Z","lastSeenAt":"2026-04-24T12:04:09.926Z"}],"details":{"listingId":"372c5321-d9b8-468e-8b46-f99cb0557463","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/283/receipt\n# Returns 402 with x402 challenge; attach X-PAYMENT header with USDC payment proof to receive the receipt.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The platform lists APIs across data & analytics, AI/ML, finance & Web3, and infrastructure, all priced at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, instant access, on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/283/receipt"}],"useCases":["Retrieving a transaction receipt for transaction 283 via a single micropayment","Programmatic access to receipt data without API key registration","Agent-driven workflows that need to fetch and verify transaction records on demand"],"bestFor":["Agents or scripts that need one-off transaction receipt lookups","Developers exploring x402 pay-per-call patterns on Base","Use cases where avoiding API key management is preferred"],"notFor":["Bulk or batch retrieval of many transaction receipts (only one transaction ID is served)","Users who need detailed API documentation or response schema guarantees before calling","Free-tier or non-crypto payment workflows"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.835Z"},"updatedAt":"2026-04-24T12:04:09.926Z"}}