{"id":"78203156-287e-4139-8295-5ac53dcf7334","shortId":"j2agan","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall on the Base network. The specific resource `/api/v1/claims/98` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints share a uniform $0.02-per-request pricing model settled in USDC (USD Coin) on Base.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The timeout is 300 seconds. No API keys or rate limits are advertised; access is instant upon payment.\n\nHowever, the specific functionality behind `/api/v1/claims/98` is unclear. The provider's landing page lists numerous endpoints across analytics, AI, finance, and utility categories, but none map directly to a `/claims/98` path. There is no OpenAPI spec, no detailed documentation (the docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt), and no request/response examples. The endpoint's actual input parameters and output format are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["api-gateway","misc"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The specific functionality of /api/v1/claims/98 is undocumented — the path does not appear in the provider's listed endpoints.","All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no substantive content.","No OpenAPI spec or request/response schema is available.","No examples of expected input or output could be found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/98","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/claims/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/claims/98 is not described anywhere in the crawled material. This is effectively a stub 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'/claims/98':186 '0.02':10,28,85,133 '000':129 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':119 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':122 '20':128 '300':142 '6':137 'Base network API' 'USDC micropayment API' 'accept':107 'access':6,24,44,152 'across':173 'actual':217 'address':118 'advertis':151 'ai':72,175 'amount':126 'analyt':71,174 'api':5,16,23,34,43,145,198 'base':8,26,51,97,130 'base-network' 'behind':45,161 'categori':68,179 'challeng':100 'coin':95 'confirm':101 'connect':207 'crypto-paid endpoint' 'data':70 'decim':138 'detail':194 'direct':183 'doc':197 'document':195 'endpoint':38,61,81,103,172,215 'exact':115 'exampl':213 'financ':75,176 'format':222 'function':160 'gate':3,21 'given':134 'howev':157 'i.e':132 'includ':69 'infrastructur':78 'input':218 'instant':154 'json-response' 'key':17,35,146 'land':168 'learn':74 'limit':149 'list':170 'live':105 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':73 'made':112 'mani':60 'map':182 'maximum':125 'model':90 'network':52 'no-api-key' 'none':181 'numer':171 'offer':62 'one':58 'openapi':191 'output':221 'page':169,202 'paramet':219 'path':187 'pay':9,27 'pay-per-call API' 'pay-per-request' 'payment':110,156 'paywal':48 'per':11,29,87 'per-request':86 'post':108 'post-method' 'premium':4,22,42 'premium API access' 'price':89,199 'prompt':209 'provid':41,65,166 'rate':148 'readm':201 'request':12,30,88,109 'request/response':212 'requir':18,36 'resourc':55 'return':204 'scheme':116 'second':143 'settl':91 'share':82 'span':67 'spec':192 'specif':54,159 'timeout':140 'unclear':164 'uniform':84 'unit':131 'unknown':224 'upon':155 'usd':94 'usdc':14,32,93,121,135 'usdc-settlement' 'use':120 'util':79,178 'via':113 'wallet':208 'web3':76 'x402':2,20,47,99 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"bc877081-227f-4f00-be4c-560f60d2c2c9","listingId":"78203156-287e-4139-8295-5ac53dcf7334","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/claims/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:59.763Z"}],"sources":[{"listingId":"78203156-287e-4139-8295-5ac53dcf7334","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:59.763Z","lastSeenAt":"2026-04-22T07:00:56.658Z"}],"details":{"listingId":"78203156-287e-4139-8295-5ac53dcf7334","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/98 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/98"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/claims/98"},{"claim":"Provider lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API key management","Programmatic pay-as-you-go access to various utility endpoints"],"bestFor":["Developers or agents wanting frictionless, keyless API access via x402","Crypto-native applications that can settle USDC on Base","Low-volume or exploratory usage where per-call pricing is preferable to subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone unable to transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:19.94Z"},"updatedAt":"2026-04-22T07:00:56.658Z"}}