{"id":"dbf1d611-e006-4a4e-a87a-6a2af8b54f4c","shortId":"J8vbL8","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 transaction receipt retrieval API. When called via POST at `/api/v1/transactions/213/receipt`, it returns a JSON receipt for the specified transaction. Payment is handled inline via the x402 protocol: each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or upfront commitments required.\n\nThe endpoint is part of a broader platform (lowpaymentfee.com) that offers a suite of pay-per-call APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform are priced uniformly at $0.02 per request and settle via USDC on Base.\n\nThe specific endpoint listed here (`/api/v1/transactions/213/receipt`) appears to serve a receipt for transaction ID 213. The x402 challenge confirms it is live, accepting the \"exact\" payment scheme with a maxAmountRequired of 20,000 base units of USDC (6 decimals = $0.02). The payment address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` and the USDC contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base. Documentation beyond the landing page is minimal — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content.","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":["Documentation pages (/docs, /api, /pricing, /README) contain no substantive content — only a 'Connect wallet' prompt.","No OpenAPI or response schema is available; the actual response format is unknown.","The endpoint path references a specific transaction ID (213), which may indicate a demo or static resource rather than a general-purpose receipt API.","No input schema or request body documentation is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/213/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/213/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no response examples, and all documentation pages return only a 'Connect wallet' stub. The specific endpoint path (transaction 213) suggests a hardcoded or demo resource rather than a general-purpose API. Very little can be inferred about the actual response 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'/request':17,34 '0.02':16,33,74,147,195 '000':188 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':200 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':206 '20':187 '213':170 '402 payment required' '6':193 'Base network API' 'USDC micropayment API' 'accept':178 'address':198 'ai':113 'analysi':117 'analyt':112 'api':47,83,109,218 'appear':162 'base':9,26,79,155,189,208 'base-network' 'beyond':210 'broader':97 'call':4,21,49,108 'challeng':173 'classif':119 'commit':89 'confirm':174 'connect':227 'content':233 'contract':204 'convers':136 'cost':73 'data':111 'decim':194 'doc':217 'document':209 'embed':120 'enabl':38 'endpoint':7,24,39,92,139,158 'estim':130 'exact':180 'exchang':125 'feed':124 'financ':121 'gas':129 'generat':137 'geocod':134 'handl':65 'id':169 'infrastructur':132 'inlin':66 'json':57 'json-response' 'key':84 'land':212 'learn':115 'limit':86 'list':159 'live':177 'lowpaymentfee' 'lowpaymentfee.com':41,99 'machin':114 'maxamountrequir':185 'minim':215 'network':80 'no-api-key' 'offer':101 'page':213,222 'part':94 'pay':2,19,106 'pay-per-cal':1,18,105 'pay-per-call' 'pay-per-request API' 'payment':63,181,197 'per':3,20,107,148 'platform':98,142 'post':51 'price':123,144,219 'prompt':229 'protocol':70 'provid':42 'quot':128 'rate':85,126 'readm':221 'receipt':6,23,45,58,166 'render':224 'request':72,149 'requir':90 'retriev':46 'return':55 'scheme':182 'sentiment':116 'serv':164 'settl':12,29,151 'span':110 'specif':157 'specifi':61 'substant':232 'suit':103 'summar':118 'token':127 'transact':5,22,44,62,168 'transaction receipt API' 'transaction-receipt' 'uniform':145 'unit':190 'upfront':88 'usdc':14,31,76,153,192,203 'usdc-settlement' 'util':133 'valid':135 'via':10,27,50,67,152 'wallet':228 'web3':122 'x402':11,28,37,69,172 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"408a7477-5461-4937-8d59-d29d3090c325","listingId":"dbf1d611-e006-4a4e-a87a-6a2af8b54f4c","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/213/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":"2026-04-18T18:59:19.309Z"}],"sources":[{"listingId":"dbf1d611-e006-4a4e-a87a-6a2af8b54f4c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/213/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:19.309Z","lastSeenAt":"2026-04-24T17:03:04.632Z"}],"details":{"listingId":"dbf1d611-e006-4a4e-a87a-6a2af8b54f4c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/213/receipt\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with a valid x402 payment token (USDC on Base, $0.02) to receive the receipt.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints on lowpaymentfee.com are priced at $0.02 per request with no API keys, rate limits, or minimums.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/transactions/213/receipt"},{"claim":"The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/transactions/213/receipt"}],"useCases":["Retrieving transaction receipts programmatically with per-call USDC payment","Integrating pay-per-use financial data into agent workflows without API key management","Demonstrating x402 protocol payment flows on Base"],"bestFor":["Agents or services needing on-demand transaction receipts without subscription overhead","Developers exploring x402 protocol integrations on Base","Low-volume, pay-as-you-go API consumption"],"notFor":["High-volume batch processing where per-call fees add up quickly","Users who need detailed API documentation or OpenAPI specs before integrating","Anyone without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.59Z"},"updatedAt":"2026-04-24T17:03:04.632Z"}}