{"id":"f42d8919-d1bb-4e19-9414-22b961892712","shortId":"G4Mkz9","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 (resource `/api/v1/transactions/327/receipt`) behind an x402 paywall. The provider operates a broad suite 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. No API keys, rate limits, or commitments are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint probed here returns a receipt for transaction ID 327. Based on the x402 challenge, the maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.\n\nNote that while the provider's landing page advertises many other endpoints (sentiment analysis, text summarization, embeddings, price feeds, geocoding, etc.), this listing covers only the `/api/v1/transactions/327/receipt` endpoint. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads 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 payment API","Base network API","pay-per-request","lowpaymentfee","receipt endpoint"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown.","Docs, API, pricing, and README pages all render only 'Connect wallet' with no usable content.","This endpoint is scoped to a single transaction ID (327); it is unclear whether other transaction IDs are accessible or how they are discovered.","The broader API suite advertised on the landing page (AI, analytics, finance, utils) could not be verified beyond the homepage listing."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/327/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/327/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 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, no example payloads, and the docs pages are empty. The specific purpose of this receipt endpoint (transaction 327) is narrow and undocumented. Effectively a stub 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'0.02':11,24,68,132 '000':121 '0x8335':126 '20':120 '2913':127 '300':145 '327':109 '6':136 'Base network API' 'USDC payment API' 'accept':150 'access':32 'addit':208 'advertis':164 'ai/ml':58 'amount':117 'analysi':169 'analyt':57 'api':54,80,194 'application/json':155 'attach':90 'avail':224 'base':8,21,77,110,122,129 'behind':39 'beyond':185 'broad':47 'call':53 'caller':88 'challeng':114 'commit':85 'connect':203 'cover':179 'data':56,61 'decim':137 'detail':210 'doc':193 'document':184,219 'embed':172 'endpoint':28,100,149,167,183 'equal':131 'etc':176 'exact':142 'exampl':222 'extrem':190 'feed':174 'finance/web3':60 'geocod':175 'given':133 'header':94 'id':108 'infer':59 'infrastructur':63 'json-response' 'key':81 'land':162,187 'limit':83 'list':178 'lowpaymentfee' 'lowpaymentfee.com':30 'mani':165 'maximum':116 'micropay':6,19 'network':9,22,78 'no-api-key' 'note':156 'openapi':214 'oper':45 'page':163,188,198 'pay':51 'pay-per-cal':50 'pay-per-call' 'pay-per-request' 'payload':223 'payment':93,139 'paywal':42 'per':12,25,52,69 'post':151 'price':66,173,195 'probe':101 'prompt':205 'provid':31,44,160 'rate':82 'readm':197 'receipt':2,15,36,105 'receipt endpoint' 'render':200 'request':13,26,70,97,152 'request/response':217 'requir':87,118 'resourc':37 'retriev':3,16 'return':103,154 'schema':218 'scheme':140 'second':146 'sentiment':168 'settl':72 'simpli':89 'span':55 'spars':191 'spec':215 'specif':99 'suit':48 'summar':171 'technic':209 'text':170 'timeout':147 'transact':1,14,35,107 'transaction receipt API' 'transaction-receipt' 'unit':123 'usdc':74,125,134 'usdc-base' 'util':64 'via':4,17 'wallet':204 'x402':5,18,41,92,113 'x402 micropayment' 'x402-payment'","prices":[{"id":"e38c226b-74c8-4a50-8698-80ebc5d5bf37","listingId":"f42d8919-d1bb-4e19-9414-22b961892712","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/327/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":"2026-04-18T19:26:03.512Z"}],"sources":[{"listingId":"f42d8919-d1bb-4e19-9414-22b961892712","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/327/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:03.512Z","lastSeenAt":"2026-04-24T09:04:27.161Z"}],"details":{"listingId":"f42d8919-d1bb-4e19-9414-22b961892712","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/327/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 x402 challenge requires a maximum of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/transactions/327/receipt"},{"claim":"The provider advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The provider lists endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilities.","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for a specific transaction ID","Programmatic proof-of-transaction retrieval for auditing or record-keeping","Agent-driven payment-gated data access on Base network"],"bestFor":["Developers needing low-cost, keyless API access settled in USDC on Base","AI agents that can handle x402 payment challenges natively","Quick one-off transaction receipt lookups without subscription overhead"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","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":"2026-02-17T23:13:39.018Z"},"updatedAt":"2026-04-24T09:04:27.161Z"}}