{"id":"bed37753-f933-4019-b5dd-469b167774cb","shortId":"Egk4p5","kind":"x402","title":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","tagline":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/products/62` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain using USDC (contract 0x8335…2913 on Base) with an exact payment scheme. The maxAmountRequired of 20,000 base units corresponds to $0.02 USD (USDC uses 6 decimals). The timeout for payment is 300 seconds.\n\nWhile the platform advertises a broad suite of endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more), the specific functionality behind `/api/v1/products/62` is not documented beyond the label \"Premium API Access.\" No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["low payment fee API","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","The specific functionality of /api/v1/products/62 ('Premium API Access') is not described anywhere in the crawled material.","No OpenAPI spec, request schema, or response schema found.","No example requests or responses available to verify what the endpoint actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/62","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/products/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation beyond the endpoint label. The docs and other pages returned only wallet-connect prompts. The specific functionality of /api/v1/products/62 is 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'/call':13,28 '0.02':12,27,79,137 '000':132 '0x8335':119 '20':131 '2913':120 '300':148 '6':141 'Base network API' 'USDC API access' 'accept':107 'access':7,22,38,187 'advertis':153 'ai':63 'analysi':162 'analyt':62 'api':6,21,37,91,186,203 'base':9,24,87,122,133 'behind':177 'beyond':182 'broad':155 'categori':59 'chain':115 'challeng':100 'classif':164 'commit':96 'confirm':101 'connect':212 'content':218 'contract':118 'correspond':135 'crawl':200 'data':61 'decim':142 'detail':194 'doc':202 'document':181,195 'embed':165 'endpoint':32,52,72,103,158 'exact':125 'exampl':192 'exchang':168 'feed':167 'financ':66 'found':197 'function':176 'geocod':170 'includ':60 'infrastructur':69 'json-response' 'key':92 'label':184 'learn':65 'limit':94 'live':105 'low payment fee API' 'lowpaymentfee.com':34 'machin':64 'mani':51 'maxamountrequir':129 'metric':159 'micropayment API' 'network':88 'no-api-key' 'offer':53 'on-chain':113 'one':49 'openapi':189 'page':207 'paid':82 'pay':2,17 'pay-per-call API' 'pay-per-request':1,16 'payment':42,110,126,146 'per':3,18,80 'platform':56,75,152 'post':108 'post-endpoint' 'premium':5,20,36,185 'price':77,166,204 'prompt':214 'protocol':43 'provid':35 'rate':93,169 'readm':206 'report':160 'request':4,19,81,109 'request/response':191 'requir':97 'resourc':46 'return':209 'schema':190 'scheme':127 'second':149 'sentiment':161 'settl':112 'span':58 'specif':45,175 'substant':217 'suit':156 'summar':163 'timeout':144 'unit':134 'usd':138 'usdc':15,30,84,117,139 'usdc-base' 'use':116,140 'util':70 'valid':171 'via':10,25,39 'wallet':213 'web3':67 'x402':11,26,41,99 'x402 API' 'x402-payment'","prices":[{"id":"530eef23-5f92-4ed1-af6b-698459aa5d97","listingId":"bed37753-f933-4019-b5dd-469b167774cb","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/products/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:57.382Z"}],"sources":[{"listingId":"bed37753-f933-4019-b5dd-469b167774cb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:57.382Z","lastSeenAt":"2026-04-23T16:30:38.219Z"}],"details":{"listingId":"bed37753-f933-4019-b5dd-469b167774cb","quickStartSnippet":"# Requires an x402-compatible HTTP client that handles the 402 challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/products/62 \\\n  -H 'Content-Type: application/json' \\\n  -H 'X-PAYMENT: <x402_payment_token>'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment in USDC on Base network, maxAmountRequired 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/products/62"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/products/62"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to a multi-category API platform"],"bestFor":["Developers or agents wanting zero-commitment, per-call API access","x402-compatible clients on the Base network","Use cases requiring no rate limits and instant access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-network USDC wallet or x402-compatible client","High-volume consumers who need bulk pricing or subscription discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.223Z"},"updatedAt":"2026-04-23T16:30:38.219Z"}}