{"id":"75deb72b-b062-46ba-92e4-9fe1ae973a2e","shortId":"S5CS3J","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (specifically for transaction ID 314) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/314/receipt` accepts POST requests and returns an `application/json` response. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header containing a valid payment proof. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid.\n\nThe platform advertises additional endpoints across four categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), all at the same $0.02 price point. However, documentation beyond the landing page is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. No OpenAPI spec, request/response schemas, or usage examples are provided for this or any other endpoint on the platform.","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 paid endpoint","USDC micropayment API","Base network API","pay-per-request API","lowpaymentfee"],"warnings":["No OpenAPI specification or response schema available for any endpoint on this platform","Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no technical content","Endpoint is hardcoded to transaction ID 314 — unclear if other transaction IDs are supported or what the receipt contains","The broader platform advertises many endpoints (AI, analytics, finance, utils) but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/314/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/314/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 spec, no request/response schema, no documentation beyond a landing page, and the endpoint is scoped to a single hardcoded transaction ID (314) with no explanation of what data it returns. The docs/pricing/README pages are all empty 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'0.02':10,24,77,137,180 '000':126 '0x8335':131 '20':125 '2913':132 '314':42 '6':141 'Base network API' 'USDC micropayment API' 'accept':92 'across':165 'addit':163 'advertis':162 'ai':170 'ai/ml':67 'amount':122 'analyt':66,169 'api':63,146,194 'application/json':98 'base':8,22,86,127,134 'base-network' 'behind':43 'beyond':185 'broader':52 'call':62,156 'caller':107 'categori':167 'commit':154 'connect':203 'contain':115 'data':65,70,168 'decim':142 'detail':210 'doc':193 'document':184 'endpoint':6,20,30,90,164,226 'equal':136 'exampl':218 'extrem':190 'financ':173 'finance/web3':69 'four':166 'gate':3,17 'given':138 'handl':102 'header':114 'howev':183 'id':41 'includ':109 'independ':158 'infer':68 'infrastructur':72,175 'json-response' 'key':147 'land':187 'learn':172 'limit':150 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':171 'maximum':121 'must':108 'network':87 'no-api-key' 'offer':55 'openapi':212 'page':188,198 'paid':159 'part':49 'pay':9,23,60 'pay-per-cal':59 'pay-per-call' 'pay-per-request API' 'payment':100,113,118 'paywal':46 'per':13,27,61,78 'platform':53,161,229 'point':182 'post':93 'price':75,181,195 'prompt':205 'proof':119 'protocol':106 'provid':33,220 'rate':149 'readm':197 'receipt':5,19,36 'render':200 'request':14,28,79,94 'request/response':214 'requir':123 'resourc':37 'respons':99 'return':96 'schema':215 'settl':81 'span':64 'spec':213 'specif':38,89 'subscript':153 'technic':209 'thin':191 'transact':4,18,35,40 'transaction receipt API' 'transaction-receipt' 'unit':128 'usag':217 'usdc':12,26,83,130,139 'usdc-settlement' 'util':73 'valid':117 'varieti':57 'via':103 'wallet':204 'web3':174 'x':112 'x-payment':111 'x402':2,16,45,105 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"2f70e560-3f2e-4640-896a-089aeb495b2d","listingId":"75deb72b-b062-46ba-92e4-9fe1ae973a2e","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/314/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":"2026-04-18T19:25:51.385Z"}],"sources":[{"listingId":"75deb72b-b062-46ba-92e4-9fe1ae973a2e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/314/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:51.385Z","lastSeenAt":"2026-04-24T11:32:47.912Z"}],"details":{"listingId":"75deb72b-b062-46ba-92e4-9fe1ae973a2e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/314/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 requiring 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/314/receipt"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for transaction 314 via a single paid API call","Demonstrating x402 payment flows in agent-to-agent commerce","Integrating pay-per-call receipt lookups into automated financial workflows"],"bestFor":["Developers experimenting with x402 protocol integrations","Agents needing on-demand transaction receipts without subscription overhead","Low-volume, pay-as-you-go API consumption on Base"],"notFor":["High-volume receipt retrieval where per-call costs add up quickly","Users who need detailed API documentation or OpenAPI specs before integrating","Accessing receipts for arbitrary transaction IDs (this endpoint is hardcoded to ID 314)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.547Z"},"updatedAt":"2026-04-24T11:32:47.912Z"}}