{"id":"8b06d1ae-da13-442f-8aa0-ef6d024ef9f9","shortId":"zwL6nM","kind":"x402","title":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","tagline":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a transaction receipt (transaction ID 386) behind an x402 paywall. It is part of a broader platform offering a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/386/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers receive a 402 challenge containing payment details (asset, amount, payTo address), construct a signed USDC payment, and include it in the `X-PAYMENT` header on retry. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are required — access is instant once payment is included.\n\nThe platform advertises additional endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages beyond the landing page were largely empty (showing only a \"Connect wallet\" prompt), so details on request/response schemas for this specific receipt endpoint are not available.","tags":[],"capabilities":["x402-payment","usdc-base","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment","USDC pay-per-call","Base network API","lowpaymentfee","receipt endpoint","crypto payment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Documentation pages (/docs, /api, /pricing, /README) are effectively empty, showing only a wallet-connect prompt","The endpoint path references a specific transaction ID (386); it is unclear whether this is parameterized or a single fixed resource","The platform lists many endpoints on its landing page but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/386/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/386/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 (returns a valid 402 x402 challenge), but there is no OpenAPI schema, no documentation beyond a landing page, no example request/response bodies, and the endpoint path suggests a single hardcoded resource (transaction 386) rather than a parameterized API. Docs pages all returned only 'Connect wallet' with no 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'0.02':11,24,73,144,196 '000':135 '20':134 '386':39 '402':104 '6':140 'Base network API' 'USDC pay-per-call' 'accept':88 'access':32,155 'addit':165 'address':112 'advertis':164 'ai/ml':63 'amount':110,131 'analysi':174 'analyt':62 'api':59,146 'asset':109 'avail':226 'base':8,21,82,136 'behind':40 'beyond':201 'broader':49 'call':58 'caller':101 'challeng':105 'classif':177 'commit':152 'connect':211 'construct':113 'contain':106 'convers':189 'crypto payment API' 'data':61,66,170 'decim':141 'detail':108,215 'document':199 'embed':178 'empti':207 'endpoint':28,86,166,223 'equal':143 'estim':186 'exchang':181 'export':171 'feed':180 'finance/web3':65 'gas':185 'generat':191 'geocod':187 'handl':96 'header':126 'id':38 'includ':119,161 'infer':64 'insight':172 'instant':157 'json':93 'json-response' 'key':147 'land':203 'larg':206 'limit':149 'lowpaymentfee' 'lowpaymentfee.com':30 'max':130 'metric':168 'micropay':6,19 'network':9,22,83 'no-api-key' 'offer':51 'page':200,204 'part':46 'pay':56 'pay-per-cal':55 'pay-per-call' 'payment':94,107,117,125,159 'payto':111 'paywal':43 'per':12,25,57,74 'platform':50,163 'point':198 'post':89 'price':71,179,197 'prompt':213 'protocol':100 'provid':31 'quot':184 'rate':148,182 'receipt':2,15,36,222 'receipt endpoint' 'receiv':102 'report':169 'request':13,26,75,90 'request/response':217 'requir':132,154 'retri':128 'retriev':3,16 'return':92 'schema':218 'sentiment':173 'servic':69 'settl':77 'show':208 'sign':115 'span':60 'specif':85,221 'summar':176 'text':175 'token':183 'transact':1,14,35,37 'transaction receipt API' 'transaction-receipt' 'unit':137 'upfront':151 'usdc':79,116,139 'usdc-base' 'util':68 'valid':188 'varieti':53 'via':4,17,97 'wallet':212 'x':124 'x-payment':123 'x402':5,18,42,99 'x402 micropayment' 'x402-payment'","prices":[{"id":"9ecbc852-1f4e-4ab1-9f42-0d75e1947734","listingId":"8b06d1ae-da13-442f-8aa0-ef6d024ef9f9","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/386/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":"2026-04-18T19:26:36.846Z"}],"sources":[{"listingId":"8b06d1ae-da13-442f-8aa0-ef6d024ef9f9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/386/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:36.846Z","lastSeenAt":"2026-04-24T05:03:16.410Z"}],"details":{"listingId":"8b06d1ae-da13-442f-8aa0-ef6d024ef9f9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/386/receipt\n# Returns 402 with x402 challenge. Parse the challenge, sign a USDC payment\n# for 20000 base units ($0.02) to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3,\n# then retry with the X-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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/386/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 & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving a transaction receipt for transaction 386 via programmatic micropayment","Demonstrating x402 protocol integration for pay-per-call APIs","Agents autonomously purchasing transaction data without API key provisioning"],"bestFor":["Developers experimenting with x402 protocol payments","AI agents that need to autonomously purchase API access on Base","Users who want pay-per-use access without subscriptions or API keys"],"notFor":["Bulk retrieval of many transaction receipts (each call costs $0.02 individually)","Users who need detailed API documentation or OpenAPI specs before integrating","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:37.418Z"},"updatedAt":"2026-04-24T05:03:16.410Z"}}