{"id":"10b54a73-e424-4111-814a-693b49259a62","shortId":"DMHeZk","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 \"Premium API Access\" transaction receipt resource. When called via POST, it returns a JSON receipt for transaction ID 3. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme.\n\nThe endpoint is live and returns a standard x402 402 challenge. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The provider's landing page confirms a flat $0.02/request pricing model across all their endpoints, with no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all at the same $0.02 price point. However, this specific listing covers only the `/api/v1/transactions/3/receipt` endpoint. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail, so the exact schema of the receipt response and the meaning of the transaction ID path parameter remain undocumented.","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"],"warnings":["No OpenAPI or response schema available — the exact structure of the receipt response is unknown.","Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no usable content.","The endpoint path includes a hardcoded transaction ID (3); it is unclear whether other IDs are supported or what they represent.","The broader platform advertises many endpoints (AI, finance, utilities) but none have documented schemas."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/3/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/3/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 402 challenge with clear pricing. However, there is no OpenAPI schema, no response examples, and the documentation pages are empty beyond a wallet-connect prompt. The purpose and output of the receipt endpoint are not documented, making this effectively a stub 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'/request':17,34,120 '0.02':16,33,108,119,160 '000':99 '0x8335':73 '20':98 '2913':74 '3':62 '402':91 '6':104 'Base network API' 'USDC micropayment API' 'access':46,136 'across':123 'advertis':141 'ai':148 'amount':95 'analyt':147 'api':45,129,143 'base':9,26,68,100 'base-network' 'beyond':174 'broader':138 'call':4,21,51 'categori':144 'challeng':92 'confirm':116 'connect':181 'contract':72 'cover':167 'data':146 'decim':105 'detail':188 'document':172 'enabl':38 'endpoint':7,24,39,83,126,171 'equal':107 'exact':79,191 'exact-pay':78 'financ':151 'flat':118 'howev':163 'id':61,203 'includ':145 'infrastructur':154 'instant':135 'json':57 'json-response' 'key':130 'land':114,176 'learn':150 'limit':133 'list':166 'live':85 'lowpaymentfee' 'lowpaymentfee.com':41,139 'machin':149 'maximum':94 'mean':199 'model':122 'multipl':142 'network':69 'no-api-key' 'page':115,173,177 'paramet':205 'path':204 'pay':2,19 'pay-per-cal':1,18 'pay-per-call' 'pay-per-request API' 'payment':63,80 'per':3,20,109 'platform':140 'point':162 'post':53 'premium':44 'price':121,161 'prompt':183 'provid':42,112 'rate':132 'receipt':6,23,48,58,195 'remain':206 'request':110 'requir':96 'resourc':49 'respons':196 'return':55,87,178 'schema':192 'scheme':81 'settl':12,29,65 'specif':165 'standard':89 'technic':187 'transact':5,22,47,60,202 'transaction receipt API' 'transaction-receipt' 'undocu':207 'unit':101 'usdc':14,31,71,103 'usdc-settlement' 'use':70 'util':155 'via':10,27,52 'wallet':182 'web3':152 'x402':11,28,37,77,90 'x402 payment endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"0a96ffbf-43a8-4ed0-b24b-6722d875dac3","listingId":"10b54a73-e424-4111-814a-693b49259a62","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/3/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":"2026-04-18T19:25:58.017Z"}],"sources":[{"listingId":"10b54a73-e424-4111-814a-693b49259a62","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/3/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:58.017Z","lastSeenAt":"2026-04-24T10:33:27.850Z"}],"details":{"listingId":"10b54a73-e424-4111-814a-693b49259a62","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/3/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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/transactions/3/receipt"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/transactions/3/receipt"}],"useCases":["Retrieving a transaction receipt via a single paid API call","Demonstrating x402 pay-per-call integration on Base","Agent-driven payment and data retrieval without API key management"],"bestFor":["Developers experimenting with x402 protocol payments","Agents that need keyless, pay-per-call API access on Base","Low-volume consumers who want no subscription or commitment"],"notFor":["High-volume batch receipt retrieval (no documented bulk endpoint)","Users who need detailed API documentation or response schemas before integrating","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.267Z"},"updatedAt":"2026-04-24T10:33:27.850Z"}}