{"id":"1e9a2521-e026-4856-9aaa-e7fa053dccc6","shortId":"HKBhMU","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data & analytics, AI & machine learning, finance & Web3, and infrastructure categories. The specific endpoint `/api/v1/claims/92` is labeled \"Premium API Access\" and is gated via the x402 protocol on the Base network, accepting USDC payments.\n\nThe x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme, settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nHowever, the actual functionality behind this specific `/api/v1/claims/92` endpoint is unclear. The platform homepage lists many categorized endpoints (analytics, AI, finance, utilities), but this particular path does not appear among them. There is no OpenAPI schema, no documentation beyond the homepage listing, and no example request/response available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation, the exact input parameters and response format for this endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","json-response"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific endpoint /api/v1/claims/92 is not listed among the platform's documented APIs — its exact functionality is unknown.","No OpenAPI schema, request parameters, or response format documentation is available.","All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no content.","The purpose of 'Premium API Access' at this path is entirely opaque without further information."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/92","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example requests or responses, and the specific endpoint's purpose is not described anywhere in the crawled material. The docs/pricing/API pages are all empty beyond a wallet connect 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'0.02':10,24,103 '000':93 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':129 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':98 '20':92 '300':132 'Base network API' 'USDC API' 'accept':76 'access':6,20,64,117 'across':45 'actual':137 'address':128 'advertis':108 'ai':48,154 'among':164 'analyt':47,153 'api':5,19,44,63,110,184 'appear':163 'avail':181 'base':8,22,74,94,100 'behind':139 'beyond':173 'broader':37 'categor':151 'categori':55 'challeng':81 'confirm':82 'connect':193 'content':199 'data':46 'doc':183 'document':172,202 'endpoint':30,58,84,143,152,212 'equal':102 'exact':124,204 'exampl':179 'financ':51,155 'format':209 'function':138 'gate':3,17,67 'homepag':148,175 'howev':135 'infrastructur':54 'input':205 'instant':116 'json-response' 'key':111 'label':61 'learn':50 'limit':114 'list':149,176 'live':86 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':49 'made':120 'mani':150 'maximum':90 'micropayment API' 'network':75 'no-api-key' 'offer':39 'openapi':169 'page':188 'paramet':206 'part':34 'particular':159 'path':160 'pay':9,23,41 'pay-per-call API' 'pay-per-request':40 'payment':78,118 'per':11,25,42,104 'platform':38,107,147 'premium':4,18,62 'premium API' 'price':185 'prompt':195 'protocol':71 'rate':113 'readm':187 'remain':213 'request':12,26,43,105 'request/response':180 'requir':88 'respons':208 'return':190 'schema':170 'scheme':125 'second':133 'settl':126 'specif':57,141 'substant':198 'timeout':134 'unclear':145 'unit':95 'unknown':214 'usdc':14,28,77,97 'usdc-base' 'util':156 'via':68,121 'wallet':194 'web3':52 'without':200 'x402':2,16,70,80,123 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"949e447c-77b0-482c-a005-04d90a35df42","listingId":"1e9a2521-e026-4856-9aaa-e7fa053dccc6","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:59.164Z"}],"sources":[{"listingId":"1e9a2521-e026-4856-9aaa-e7fa053dccc6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/92","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:59.164Z","lastSeenAt":"2026-04-22T10:01:46.596Z"}],"details":{"listingId":"1e9a2521-e026-4856-9aaa-e7fa053dccc6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/92 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/92"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/92"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API endpoint with per-request USDC micropayments on Base","Integrating x402-gated services into agent workflows without API key management","Making one-off paid API calls without subscriptions or commitments"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing well-documented APIs with clear input/output schemas","Anyone without a Base-compatible USDC wallet","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:19.941Z"},"updatedAt":"2026-04-22T10:01:46.596Z"}}