{"id":"1cd632cb-302b-4da8-81b6-0dccd99b1786","shortId":"D5Wb8v","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 184) via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The advertised cost is 20,000 base units of USDC, which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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 the same $0.02/request price point. However, this specific listing covers only the `/api/v1/transactions/184/receipt` endpoint.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the receipt payload actually contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data is returned or what request body (if any) is expected.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) contain no substantive content — only a 'Connect wallet' prompt.","No OpenAPI or schema definition available; request body and response format are unknown.","This endpoint is for a specific transaction ID (184); it is unclear whether other transaction IDs are available or how they are discovered.","The broader platform lists many API categories (AI, finance, analytics, etc.) but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/184/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/184/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 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs showing only 'Connect wallet'. The specific purpose of this receipt endpoint is unclear beyond its URL 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'/request':17,34,164 '0.02':16,33,87,163 '000':80 '0x8335':66 '184':51 '20':79 '2913':67 '402':224 '6':92 'Base network API' 'USDC micropayment API' 'access':43 'actual':214 'advertis':76,120 'ai/ml':132 'analysi':135 'analyt':131 'api':95,128,182 'attach':104 'base':9,26,61,81 'base-network' 'bodi':243 'broader':117 'call':4,21,127 'caller':102 'challeng':225 'classif':137 'confirm':219 'connect':191 'contain':215 'content':197 'contract':65 'convers':154 'cost':77 'cover':171 'data':130,140,237 'decim':93 'descript':208 'difficult':233 'doc':181 'document':176,230 'embed':138 'enabl':38 'endpoint':7,24,39,157,175,217 'equal':86 'estim':148 'exact':72 'exact-pay':71 'exampl':205 'exchang':143 'expect':247 'extrem':178 'feed':142 'finance/web3':139 'gas':147 'generat':155 'geocod':152 'header':109 'howev':167 'id':50 'infer':133 'infrastructur':150 'key':96 'know':235 'lack':228 'limit':99 'list':159,170 'live':220 'lowpaymentfee' 'lowpaymentfee.com':41,118 'make':231 'network':62 'no-api-key' 'openapi':201 'page':186 'pay':2,19,125 'pay-per-cal':1,18,124 'pay-per-call' 'pay-per-request API' 'payload':213 'payment':56,73,108,114 'per':3,20,88,126 'platform':119 'point':166 'post':54 'post-endpoint' 'price':141,165,183 'prompt':193 'proof':115 'proper':223 'provid':42 'quot':146 'rate':98,144 'readm':185 'receipt':6,23,47,212 'request':55,89,242 'request/response':204 'requir':101 'resourc':48 'return':188,221,239 'schema':202 'scheme':74 'sentiment':134 'settl':12,29,58 'simpli':103 'span':129 'spars':179 'specif':169 'substant':196 'suit':122 'summar':136 'token':145 'transact':5,22,46,49 'transaction receipt API' 'transaction-receipt' 'unit':82 'usdc':14,31,64,84,90 'usdc-settlement' 'use':63,91 'util':151 'valid':112,153 'via':10,27,52 'wallet':192 'x':107 'x-payment':106 'x402':11,28,37,70,113 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"ebffab11-1ffb-4008-a35d-a148ee186b5c","listingId":"1cd632cb-302b-4da8-81b6-0dccd99b1786","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/184/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":"2026-04-18T18:59:08.442Z"}],"sources":[{"listingId":"1cd632cb-302b-4da8-81b6-0dccd99b1786","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/184/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:08.442Z","lastSeenAt":"2026-04-24T18:33:04.620Z"}],"details":{"listingId":"1cd632cb-302b-4da8-81b6-0dccd99b1786","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/184/receipt \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/184/receipt"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/transactions/184/receipt"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) show only 'Connect wallet' with no content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 184 via a single paid API call","Demonstrating x402 payment-gated API access on the Base network","Integrating pay-per-call receipt retrieval into agent workflows without API key management"],"bestFor":["Developers experimenting with x402 payment protocols","Agents needing on-demand transaction receipt data without subscription commitments","Projects requiring USDC-settled micropayment API access on Base"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need detailed API documentation or response schema guarantees before integrating","Non-crypto workflows that cannot produce x402 payment headers"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:42.037Z"},"updatedAt":"2026-04-24T18:33:04.620Z"}}