{"id":"c0b3adee-ea8b-4e5d-a5ae-027984584883","shortId":"YfTVdA","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 access to a transaction receipt resource (transaction ID 391) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact payment scheme. The price per call is $0.02 (20,000 base units with 6 decimals).\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 data (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. However, the specific endpoint being listed here is scoped to `/api/v1/transactions/391/receipt`, which appears to return a receipt for a particular transaction.\n\nDocumentation 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 schema, no request/response examples, and no detailed documentation describing what the receipt payload contains or what input parameters the POST body expects. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation makes it difficult to use without experimentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all render only 'Connect wallet'","No OpenAPI or output schema describing the response format","Endpoint is scoped to a single transaction ID (391); unclear if other transaction IDs are available or how to discover them","No request body schema documented; unknown what POST body parameters are expected","Platform advertises many endpoints but none have detailed docs"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/391/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/391/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the endpoint path is specific to a single transaction ID (391), making its general utility 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'/request':17,34 '0.02':16,33,79,132 '000':81 '0x8335':66 '20':80 '2913':67 '391':51 '402':223 '6':85 'Base network API' 'USDC micropayment API' 'access':43 'advertis':91 'ai/ml':103 'analysi':106 'analyt':102 'api':99,137,173 'appear':158 'base':9,26,61,82 'base-network' 'bodi':213 'broader':88 'call':4,21,77,98 'challeng':225 'classif':108 'commit':145 'confirm':218 'connect':182 'contain':206 'content':188 'contract':65 'convers':125 'data':101,111 'decim':86 'describ':201 'detail':199 'difficult':233 'doc':172 'document':167,200,230 'embed':109 'enabl':38 'endpoint':7,24,39,128,149,216 'estim':119 'exact':71 'exampl':196 'exchang':114 'expect':214 'experiment':237 'extrem':169 'feed':113 'finance/web3':110 'gas':118 'generat':126 'geocod':123 'howev':146 'id':50 'infer':104 'infrastructur':121 'input':209 'key':138 'lack':228 'limit':141 'list':130,151 'live':219 'lowpaymentfee' 'lowpaymentfee.com':41,89 'make':231 'minimum':144 'network':62 'no-api-key' 'openapi':192 'page':177 'paramet':210 'particular':165 'pay':2,19,96 'pay-per-cal':1,18,95 'pay-per-call' 'pay-per-request API' 'payload':205 'payment':56,72 'per':3,20,76,97,133 'platform':90 'post':54,212 'price':75,112,174 'prompt':184 'proper':222 'provid':42 'quot':117 'rate':115,140 'readm':176 'receipt':6,23,47,162,204 'render':179 'request':55,134 'request/response':195 'resourc':48 'return':160,220 'schema':193 'scheme':73 'scope':154 'sentiment':105 'settl':12,29,58 'span':100 'spars':170 'specif':148 'substant':187 'suit':93 'summar':107 'token':116 'transact':5,22,46,49,166 'transaction receipt API' 'transaction-receipt' 'unit':83 'usdc':14,31,64 'usdc-settlement' 'use':63,235 'util':122 'valid':124 'via':10,27,52 'wallet':183 'without':236 'x402':11,28,37,70,224 'x402 paid endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"9b7ff5f9-2f78-4a23-940b-2b1cd9e57cbe","listingId":"c0b3adee-ea8b-4e5d-a5ae-027984584883","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/391/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":"2026-04-18T19:26:42.358Z"}],"sources":[{"listingId":"c0b3adee-ea8b-4e5d-a5ae-027984584883","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/391/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:42.358Z","lastSeenAt":"2026-04-24T05:03:16.573Z"}],"details":{"listingId":"c0b3adee-ea8b-4e5d-a5ae-027984584883","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/391/receipt \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/391/receipt"},{"claim":"All 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 platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a receipt for a specific transaction (ID 391) via programmatic pay-per-call access","Demonstrating x402 payment protocol integration for agent-to-agent commerce","Testing USDC micropayment flows on the Base network"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing pay-per-call access without API key management","Use cases requiring USDC-settled micropayments on Base"],"notFor":["Users needing detailed API documentation or response schema before integrating","Bulk or high-volume receipt retrieval across many transaction IDs","Anyone requiring non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.193Z"},"updatedAt":"2026-04-24T05:03:16.573Z"}}