{"id":"c33852f5-2d2e-4dca-b4f3-636b89f8158a","shortId":"k2F8AM","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/356/receipt`) behind an x402 paywall. The provider operates a broader platform offering numerous pay-per-call API endpoints across categories including 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 probed returns a 402 challenge requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the x402 exact scheme with no API keys or rate limits required. The response MIME type is `application/json`. The endpoint accepts POST requests and is discoverable.\n\nDocumentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The nature of the \"receipt\" data returned is not documented beyond the endpoint path and generic \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment endpoint","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","receipt lookup"],"warnings":["No API documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'","No OpenAPI or output schema provided; response structure is unknown","This endpoint is for a specific transaction ID (356); it is unclear whether other transaction IDs are supported or how to discover them","The broader platform advertises many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/356/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/356/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, documentation is essentially absent — no OpenAPI spec, no request/response schemas, no examples, and no explanation of what data the receipt contains. The docs/pricing/API pages all show only 'Connect wallet' with no content. This is effectively a stub 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'0.02':11,24,72,108 '000':97 '0x8335':102 '20':96 '2913':103 '402':89 '6':112 'Base network API' 'USDC pay-per-call' 'accept':138 'access':32,202 'across':57 'ai/ml':62 'analyt':61 'api':55,124,154,201 'application/json':135 'avail':183 'base':8,21,81,98,105 'base-network' 'behind':39 'beyond':194 'broader':47 'call':54 'categori':58 'challeng':90 'connect':162 'crypto payment API' 'data':60,65,189 'decim':113 'detail':169 'discover':143 'doc':152 'document':144,178,193 'endpoint':28,56,85,137,196 'equal':107 'exact':120 'exampl':182 'extrem':149 'finance/web3':64 'generic':199 'includ':59 'infer':63 'infrastructur':67 'json-response' 'key':125 'label':203 'limit':128 'lowpaymentfee' 'lowpaymentfee.com':30 'made':116 'micropay':6,19 'mime':132 'natur':185 'network':9,22,82 'no-api-key' 'numer':50 'offer':49 'openapi':173 'oper':45 'page':157 'path':197 'pay':52 'pay-per-cal':51 'pay-per-request' 'payment':92,114 'paywal':42 'per':12,25,53,73 'platform':48 'post':139 'premium':200 'price':70,153 'probe':86 'prompt':164 'provid':31,44 'rate':127 'readm':156 'receipt':2,15,36,188 'receipt lookup' 'render':159 'request':13,26,74,91,140 'request/response':176 'requir':129 'resourc':37 'respons':131 'retriev':3,16 'return':87,190 'schema':177 'scheme':121 'settl':76 'site':147 'spars':150 'spec':174 'specif':84 'technic':168 'transact':1,14,35 'transaction receipt API' 'transaction-receipt' 'type':133 'unit':99 'usag':181 'usd':109 'usdc':78,101,110 'usdc-settlement' 'use':111 'util':68 'via':4,17,117 'wallet':163 'x402':5,18,41,119 'x402 micropayment endpoint' 'x402-payment'","prices":[{"id":"174b07d5-4c3a-431a-9e8b-28a8a178ba25","listingId":"c33852f5-2d2e-4dca-b4f3-636b89f8158a","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/356/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":"2026-04-18T19:26:16.198Z"}],"sources":[{"listingId":"c33852f5-2d2e-4dca-b4f3-636b89f8158a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/356/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:16.198Z","lastSeenAt":"2026-04-24T07:32:36.545Z"}],"details":{"listingId":"c33852f5-2d2e-4dca-b4f3-636b89f8158a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/356/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/356/receipt"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/356/receipt"},{"claim":"All endpoints 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"}],"useCases":["Retrieving a transaction receipt for transaction ID 356 via micropayment","Demonstrating x402 protocol payment flow on Base network","Programmatic access to receipt data without API key registration"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing on-demand transaction receipt data without subscription","Use cases requiring keyless, pay-per-call API access on Base"],"notFor":["Bulk or high-volume receipt retrieval (no documented batch endpoint)","Users who need detailed API documentation or response schema guarantees","Non-crypto users who cannot pay in USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.385Z"},"updatedAt":"2026-04-24T07:32:36.545Z"}}