{"id":"4540a91a-f356-4f60-95eb-d76afe0fb30d","shortId":"zPvbKB","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API platform that gates a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint `/api/v1/claims/85` is listed as \"Premium API Access\" and accepts POST requests, charging up to 20,000 base units of USDC (i.e., $0.02) per call. Payment is handled via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required.\n\nThe broader platform advertises four categories of endpoints: 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 the same $0.02/request price point. However, the specific functionality behind the `/api/v1/claims/85` path is not documented beyond the generic \"Premium API Access\" label, so its exact purpose is unclear.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The endpoint is confirmed live (returning a valid 402 challenge), but without knowing what data or service it actually returns, callers should proceed with caution.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","post-endpoint","json-response"],"categories":["api-marketplace","payments"],"synonyms":["low payment fee","x402 api","micropayment api","pay-per-request api","base usdc api","claims api","402 payment api"],"warnings":["The specific functionality of /api/v1/claims/85 ('Premium API Access') is completely undocumented — it is unclear what data or service it provides.","All documentation pages (/docs, /api, /pricing, /README) returned only a 'Connect wallet' prompt with no usable content.","No OpenAPI spec, request schema, or response schema is available.","No examples of successful responses exist in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/85","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/85","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 x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what '/api/v1/claims/85' actually returns. The docs pages are empty. This is effectively a stub 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'/api/v1/claims/85':62,162 '/docs':185 '/pricing':187 '/readme':189 '/request':17,34,153 '0.02':16,33,83,152 '000':77 '20':76 '402':228 '402 payment api' 'accept':70 'access':68,172 'actual':238 'advertis':107 'ai':10,27,119 'analysi':123 'analyt':113 'api':4,21,41,67,95,171 'avail':215 'base':7,24,57,78 'base usdc api' 'base-network' 'behind':49,160 'beyond':167 'broader':105 'call':85 'caller':240 'categori':109 'caution':244 'challeng':229 'charg':73 'claims api' 'classif':126 'confirm':223 'connect':195 'content':201 'convers':143 'crawl':218 'data':9,26,112,116,234 'document':166,180,210 'embed':127 'endpoint':14,31,48,61,111,146,221 'estim':137 'exact':92,176 'exampl':214 'exchang':132 'export':117 'extrem':182 'feed':131 'financ':11,28,128 'four':108 'function':159 'gas':136 'gate':3,20,44 'generat':144 'generic':169 'geocod':141 'handl':88 'howev':156 'i.e':82 'infrastructur':139 'insight':118 'json-response' 'key':96 'know':232 'label':173 'learn':121 'limit':99 'list':64,148 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'x402-protocol':38","prices":[{"id":"18d6623a-85eb-4aec-bba9-ae6ddf4f53ab","listingId":"4540a91a-f356-4f60-95eb-d76afe0fb30d","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:02.150Z"}],"sources":[{"listingId":"4540a91a-f356-4f60-95eb-d76afe0fb30d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:02.150Z","lastSeenAt":"2026-04-22T23:01:31.443Z"}],"details":{"listingId":"4540a91a-f356-4f60-95eb-d76afe0fb30d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/85 \\\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":"The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/85"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints in Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/85"}],"useCases":["Paying per-request for API access without needing API keys or subscriptions","Programmatic agent-driven API consumption using x402 USDC micropayments on Base","Accessing data, AI, finance, or utility endpoints with minimal friction"],"bestFor":["Developers or agents wanting key-free, pay-as-you-go API access","x402-compatible wallets and agents on the Base network","Low-cost micropayment experimentation ($0.02/call)"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume use cases where per-request crypto payments add unacceptable latency"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:19.823Z"},"updatedAt":"2026-04-22T23:01:31.443Z"}}