{"id":"9d5e21da-2f6f-4a35-8a97-948d7562c67e","shortId":"BPVT8R","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 access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/claims/17` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. Payment is made via the x402 exact scheme with no API keys, rate limits, or subscriptions required.\n\nThe broader platform advertises four categories of APIs: 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 per request price point. However, the specific endpoint probed (`/api/v1/claims/17`) does not clearly map to any of these named services, and its actual functionality is undocumented.\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 schema, no request/response examples, and no description of what the `/claims/17` endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but without documentation it is impossible to determine what data or service it provides.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","no-api-key","json-response","post-method"],"categories":["api-platform","payments"],"synonyms":["x402 api","micropayment api","pay-per-request api","base network api","USDC api","lowpaymentfee","claims api"],"warnings":["The /claims/17 endpoint has no documentation — its actual functionality is unknown.","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content.","No OpenAPI schema or request/response examples are available.","The endpoint name 'Premium API Access' does not map to any of the named services on the landing page."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/17","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the /claims/17 endpoint actually does, no request/response schema, and the docs pages are empty. The listing is effectively a stub with only pricing and protocol details 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'/api/v1/claims/17':67,172 '/claims/17':225 '/docs':194 '/pricing':196 '/readme':198 '/request':17,34 '0.02':16,33,89,162 '000':83 '20':82 '402':77,234 '6':93 'USDC api' 'access':45,73 'actual':185,227 'advertis':117 'ai':10,27,129 'analysi':133 'analyt':123 'api':4,21,41,72,107,121 'base':7,24,61,84 'base network api' 'behind':51 'broader':115 'call':96 'captur':236 'categori':119 'challeng':78,235 'claims api' 'classif':136 'clear':175 'confirm':232 'connect':204 'content':210 'convers':153 'data':9,26,122,126,246 'decim':94 'descript':221 'determin':244 'document':189,239 'embed':137 'endpoint':14,31,50,65,156,170,226,230 'estim':147 'exact':103 'exampl':218 'exchang':142 'export':127 'extrem':191 'feed':141 'financ':11,28,138 'four':118 'function':186 'gas':146 'gate':3,20,44 'generat':154 'geocod':151 'given':90 'howev':167 'i.e':88 'imposs':242 'infrastructur':149 'insight':128 'json-response' 'key':108 'learn':131 'limit':110 'list':69,158 'live':233 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':130 'made':99 'map':176 'metric':124 'micropay':55 'micropayment api' 'name':181 'network':62 'no-api-key' 'offer':8,25 'openapi':214 'page':199 'pay-per-request api' 'payment':97 'per':53,95,163 'per-request':52 'per-request-micropayment' 'platform':5,22,42,116 'point':166 'post-method' 'premium':71 'price':140,165 'probe':171 'prompt':206 'protocol':40 'provid':250 'quot':145 'rate':109,143 'render':201 'report':125 'request':54,79,164 'request/response':217 'requir':113 'return':75,228 'schema':215 'scheme':104 'sentiment':132 'servic':182,248 'settl':56 'spars':192 'specif':64,169 'subscript':112 'summar':135 'text':134 'token':144 'undocu':188 'unit':85 'usdc':58,87,91 'usdc-base' 'util':13,30,150 'valid':152 'varieti':48 'via':100 'wallet':205 'web3':139 'without':238 'x402':2,19,39,102 'x402 api' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"36100530-f885-4581-83a4-96f825af7f49","listingId":"9d5e21da-2f6f-4a35-8a97-948d7562c67e","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:52.527Z"}],"sources":[{"listingId":"9d5e21da-2f6f-4a35-8a97-948d7562c67e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/17","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:52.527Z","lastSeenAt":"2026-04-24T09:32:09.811Z"}],"details":{"listingId":"9d5e21da-2f6f-4a35-8a97-948d7562c67e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/17 \\\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 402 challenge requesting up to 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).","source_url":"https://lowpaymentfee.com/api/v1/claims/17"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, rate limits, or minimums.","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure utility API categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-request for API access without subscriptions or API keys","Integrating x402-compatible agents with low-cost data or utility endpoints","Exploring x402 protocol micropayment flows on Base"],"bestFor":["Developers experimenting with x402 micropayment protocol","Agents that need keyless, pay-per-call API access on Base","Low-volume consumers who want no-commitment API usage"],"notFor":["Production workloads requiring documented, stable API contracts","Users who need detailed request/response schemas before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.278Z"},"updatedAt":"2026-04-24T09:32:09.811Z"}}