{"id":"e9b18b1c-11b7-4d01-88c7-4d1b8efdb220","shortId":"bWRDnh","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/257/receipt`) behind an x402 paywall. Payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals). The endpoint accepts POST requests and returns JSON.\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nDocumentation is extremely sparse — 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 specific endpoint probed here (`/transactions/257/receipt`) is not listed on the homepage's API catalog, so its purpose and response format are unclear beyond the generic \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","usdc-base","transaction-receipt","micropayment","pay-per-request","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment","USDC payment API","Base network API","pay-per-call API","lowpaymentfee","receipt endpoint"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition found for any endpoint","The specific endpoint /api/v1/transactions/257/receipt is not listed in the site's own API catalog","Request body format and response schema are completely unknown","Platform appears to be a demo or early-stage project with placeholder documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/257/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/257/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific endpoint path (/transactions/257/receipt) is not listed in the site's own catalog, and all doc pages return only 'Connect wallet' with no content. This is effectively a stub 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'/api/v1/transactions/257/receipt':38 '/docs':145 '/pricing':147 '/readme':149 '/transactions/257/receipt':182 '0.02':11,24,53,126 '000':59 '20':58 '6':65 'Base network API' 'USDC payment API' 'accept':69 'access':32,205 'advertis':79 'ai':95 'analysi':99 'analyt':89 'api':86,131,190,204 'avail':176 'base':8,21,50,60 'behind':39 'beyond':200 'broader':76 'catalog':191 'classif':102 'commit':139 'connect':155 'convers':119 'data':88,92 'decim':66 'detail':162 'document':140,171 'embed':103 'endpoint':28,68,122,179 'estim':113 'exampl':175 'exchang':108 'export':93 'extrem':142 'feed':107 'financ':104 'format':197 'gas':112 'gate':85 'generat':120 'generic':202 'geocod':117 'homepag':188 'infrastructur':115 'insight':94 'json':74 'json-response' 'key':132 'label':206 'learn':97 'limit':135 'list':124,185 'lowpaymentfee' 'lowpaymentfee.com':30,77 'machin':96 'maxamountrequir':56 'metric':90 'micropay':6,19 'micropayment' 'minimum':138 'network':9,22,51 'openapi':166 'page':150 'pay-per-call API' 'pay-per-request' 'payment':43 'paywal':42 'per':12,25,54,127 'platform':78 'post':70 'premium':203 'price':106 'probe':180 'prompt':157 'provid':31 'purpos':194 'quot':111 'rate':109,134 'receipt':2,15,36 'receipt endpoint' 'render':152 'report':91 'request':13,26,55,71,128 'request/response':169 'resourc':37 'respons':196 'retriev':3,16 'return':73 'schema':170 'sentiment':98 'settl':45 'span':87 'spars':143 'spec':167 'specif':178 'suit':81 'summar':101 'technic':161 'text':100 'token':110 'transact':1,14,35 'transaction receipt API' 'transaction-receipt' 'unclear':199 'unit':61 'usag':174 'usdc':47,63 'usdc-base' 'util':116 'valid':118 'via':4,17 'wallet':156 'web3':105 'x402':5,18,41,84 'x402 micropayment' 'x402-gated':83 'x402-payment'","prices":[{"id":"6e4ab0d2-3d81-4bb2-b318-7bf51c43be00","listingId":"e9b18b1c-11b7-4d01-88c7-4d1b8efdb220","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/257/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":"2026-04-18T18:59:36.611Z"}],"sources":[{"listingId":"e9b18b1c-11b7-4d01-88c7-4d1b8efdb220","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/257/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:36.611Z","lastSeenAt":"2026-04-24T14:33:33.505Z"}],"details":{"listingId":"e9b18b1c-11b7-4d01-88c7-4d1b8efdb220","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/257/receipt\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with valid USDC payment proof on Base to access the resource.","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 USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/transactions/257/receipt"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/257/receipt"},{"claim":"All listed APIs 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 lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a transaction receipt for a specific transaction ID via micropayment","Programmatic access to receipt data without API key registration","Agent-driven payment-gated data retrieval on Base network"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need on-demand receipt data without pre-registration","Low-friction pay-per-use API consumption on Base"],"notFor":["Production use requiring documented request/response schemas","Bulk or high-volume receipt retrieval where per-call pricing is inefficient","Users who need detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:40.748Z"},"updatedAt":"2026-04-24T14:33:33.505Z"}}