{"id":"4315cb04-3b34-4a22-8c33-ac34f9cc27d1","shortId":"FndTvx","kind":"x402","title":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","tagline":"Pay-per-call transaction receipt endpoint on Base via x402, $0.02/request in USDC.","description":"This x402-enabled endpoint at lowpaymentfee.com provides a transaction receipt retrieval service. The specific endpoint `/api/v1/transactions/111/receipt` returns receipt data for transaction ID 111 in JSON format, payable at $0.02 per request in USDC on the Base network.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call 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 uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nPayment is handled via the x402 protocol on Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The endpoint accepts POST requests and returns application/json responses. The payment challenge specifies a maximum amount of 20000 base units (USDC has 6 decimals, so this equals $0.02) with a 300-second timeout window.","tags":[],"capabilities":["x402-payment","transaction-receipt","pay-per-call","base-network","usdc-settlement","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request","lowpaymentfee","crypto payment API"],"warnings":["No API documentation available — docs, pricing, and API pages all render only a wallet-connect prompt","No request or response schema documented for this endpoint","The specific transaction ID '111' in the URL suggests this may be a demo/example endpoint rather than a general-purpose receipt API","Platform appears to be early-stage with minimal documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/111/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/111/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear, but there is no OpenAPI schema, no documentation of request/response bodies, and the crawled docs/pricing/API pages all just show 'Connect wallet' with no substantive content. The specific functionality of this receipt endpoint is not documented beyond its 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'/request':13,28 '0.02':12,27,60,114,170 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':142 '111':54 '20000':160 '300':173 '6':165 'Base network API' 'USDC micropayment API' 'accept':145 'advertis':73 'ai/ml':85 'amount':158 'analysi':88 'analyt':84 'api':81,119 'application/json':150 'base':9,24,67,137,161 'base-network' 'broader':70 'call':4,19,80 'challeng':154 'classif':90 'commit':127 'contract':141 'convers':106 'crypto payment API' 'data':50,83 'decim':166 'embed':91 'enabl':34 'endpoint':7,22,35,46,109,144 'equal':169 'estim':100 'exchang':95 'feed':94 'finance/web3':92 'format':57 'gas':99 'generat':107 'geocod':104 'handl':131 'id':53 'infer':86 'infrastructur':102 'json':56 'json-response' 'key':120 'limit':123 'lowpaymentfee' 'lowpaymentfee.com':37,71 'maximum':157 'minimum':126 'network':68,138 'no-api-key' 'pay':2,17,78 'pay-per-cal':1,16,77 'pay-per-call' 'pay-per-request' 'payabl':58 'payment':129,153 'per':3,18,61,79,115 'platform':72 'post':146 'price':93,111 'protocol':135 'provid':38 'quot':98 'rate':96,122 'receipt':6,21,41,49 'request':62,116,147 'requir':128 'respons':151 'retriev':42 'return':48,149 'second':174 'sentiment':87 'servic':43 'span':82 'specif':45 'specifi':155 'suit':75 'summar':89 'timeout':175 'token':97 'transact':5,20,40,52 'transaction receipt API' 'transaction-receipt' 'uniform':112 'unit':162 'usdc':15,30,64,140,163 'usdc-settlement' 'use':139 'util':103 'valid':105 'via':10,25,132 'window':176 'x402':11,26,33,134 'x402 payment endpoint' 'x402-enabled':32 'x402-payment'","prices":[{"id":"af3dbed4-d759-4619-89eb-1a30b5e9a879","listingId":"4315cb04-3b34-4a22-8c33-ac34f9cc27d1","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/111/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":"2026-04-18T18:58:19.508Z"}],"sources":[{"listingId":"4315cb04-3b34-4a22-8c33-ac34f9cc27d1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/111/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:19.508Z","lastSeenAt":"2026-04-25T01:32:59.653Z"}],"details":{"listingId":"4315cb04-3b34-4a22-8c33-ac34f9cc27d1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/111/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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/111/receipt"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/111/receipt"}],"useCases":["Retrieving transaction receipts programmatically without API key management","Integrating pay-per-call data access into autonomous agent workflows","Accessing financial or analytics data with instant USDC micropayments on Base"],"bestFor":["Agents needing keyless, pay-as-you-go API access","Developers wanting to avoid subscription commitments for low-volume usage","Web3-native applications that can settle payments in USDC on Base"],"notFor":["High-volume use cases where per-request pricing becomes expensive compared to subscriptions","Users without access to USDC on Base network","Applications requiring guaranteed SLAs or enterprise support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.398Z"},"updatedAt":"2026-04-25T01:32:59.653Z"}}