{"id":"856fb603-01b7-4569-9f98-3956f35d798f","shortId":"QWUmaG","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 (transaction ID 107) behind an x402 paywall. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per call and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/107/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header containing a signed payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the merchant address `0x1A2B…85F3`. The payment scheme is \"exact\" with a 300-second timeout window. No API keys or rate limits are advertised; access is gated purely by micropayment.\n\nDocumentation on the site is extremely thin — the docs, API, pricing, 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 endpoint is confirmed live (returns a proper 402 challenge), but the actual content and structure of the receipt response are unknown.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","transaction-receipt","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt","payment receipt","x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, and README pages only show 'Connect wallet'","No OpenAPI or output schema provided; response format is unknown","The specific endpoint is for a single transaction ID (107); unclear if other transaction IDs are available or how they are discovered","The broader platform advertises many API categories (AI, analytics, finance, utilities) but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/107/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/107/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the actual purpose of the receipt content is undocumented. This is effectively a stub 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'0.02':10,24,75,124 '000':119 '0x1a2b':135 '107':40 '20':118 '300':144 '402':210 '6':129 '85f3':136 'Base network API' 'USDC pay-per-call' 'accept':90 'access':156 'actual':214 'address':134 'advertis':155 'ai/ml':65 'analyt':64 'api':61,149,171 'avail':201 'base':8,22,84,120 'base-network' 'behind':41 'broader':50 'call':77 'caller':103 'challeng':211 'confirm':205 'connect':180 'contain':111 'content':215 'data':63,68 'decim':130 'detail':187 'doc':170 'document':162,196 'endpoint':6,20,30,88,203 'exact':141 'exampl':200 'extrem':167 'finance/web3':67 'gate':3,17,158 'handl':98 'header':110 'id':39 'includ':105 'infer':66 'infrastructur':70 'json':95 'key':150 'limit':153 'live':206 'lowpaymentfee' 'lowpaymentfee.com':32 'merchant':133 'micropay':161 'micropayment API' 'must':104 'network':85 'no-api-key' 'offer':53 'openapi':191 'page':175 'part':47 'pay':9,23,58 'pay-per-request':57 'payment':96,109,114,138 'payment receipt' 'paywal':44 'per':13,27,59,76 'platform':51 'post':91 'price':73,172 'prompt':182 'proper':209 'protocol':102 'provid':33 'pure':159 'rate':152 'readm':174 'receipt':5,19,36,220 'render':177 'request':14,28,60,92 'request/response':194 'resourc':37 'respons':221 'return':94,207 'schema':195 'scheme':139 'second':145 'settl':79 'sign':113 'sinc':126 'site':165 'span':62 'spec':192 'specif':87 'structur':217 'technic':186 'thin':168 'timeout':146 'transact':4,18,35,38 'transaction receipt' 'transaction-receipt' 'unit':121 'unknown':223 'usag':199 'usd':125 'usdc':12,26,81,123,127 'usdc-micropayment' 'use':128 'util':71 'varieti':55 'via':99 'wallet':181 'window':147 'x':108 'x-payment':107 'x402':2,16,43,101 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"b6add856-5e66-4657-b395-49a3e068048e","listingId":"856fb603-01b7-4569-9f98-3956f35d798f","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/107/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":"2026-04-18T18:58:13.714Z"}],"sources":[{"listingId":"856fb603-01b7-4569-9f98-3956f35d798f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/107/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:13.714Z","lastSeenAt":"2026-04-25T03:03:30.042Z"}],"details":{"listingId":"856fb603-01b7-4569-9f98-3956f35d798f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/107/receipt\n# Returns 402 with x402 challenge; include X-PAYMENT header with signed USDC payment (0.02 USD on Base) to access.","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/107/receipt"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/107/receipt"}],"useCases":["Retrieving a transaction receipt for transaction 107 via micropayment","Programmatic access to receipt data without API key management","Agent-driven payment-gated data retrieval on Base"],"bestFor":["Developers experimenting with x402 micropayment protocols","Agents that need to fetch transaction receipts on-demand","Use cases requiring keyless, pay-per-call API access"],"notFor":["Bulk retrieval of many transaction receipts (no batch endpoint documented)","Users who need detailed API documentation or response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.554Z"},"updatedAt":"2026-04-25T03:03:30.042Z"}}