{"id":"8e01c34d-918e-4b47-8a38-92ec4c0b10d1","shortId":"nNDS9V","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/policies/60` is listed as \"Premium API Access\" and returns an x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and returns `application/json`. The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation.\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 examples of what this particular endpoint actually returns. The endpoint is live (confirmed via 402 challenge), but without documentation it is unclear what \"Premium API Access\" at the `/policies/60` path specifically provides.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","micropayment API","pay-per-call API","USDC API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition for this endpoint; request body format and response structure are completely unknown","The specific purpose of /api/v1/policies/60 ('Premium API Access') is unclear and may differ from the other listed endpoints","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/60","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/policies/60","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of '/api/v1/policies/60' specifically is unknown beyond the generic label 'Premium API Access'. The docs/pricing/README pages are all empty wallet-connect 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'/policies/60':226 '/request':13,28 '0.02':12,27,62,121 '000':110 '0x8335':115 '20':109 '2913':116 '402':212 '6':125 'Base network API' 'USDC API' 'accept':129 'access':100,223 'account':74 'across':45 'actual':204 'advertis':138 'ai/ml':48 'analysi':147 'analyt':47 'api':5,20,37,72,99,171,222 'application/json':134 'attach':82 'base':8,23,69,111,118 'base-network' 'broader':136 'call':4,19 'caller':80 'categori':139 'challeng':105,213 'classif':150 'confirm':210 'connect':180 'content':186 'convers':162 'crypto-paid API' 'data':46,143 'decim':126 'doc':170 'document':165,195,216 'embed':151 'enabl':36 'endpoint':44,55,92,128,203,207 'equal':120 'estim':159 'exampl':198 'exchang':154 'export':144 'extrem':167 'feed':153 'finance/web3':50 'gas':158 'generat':164 'geocod':160 'given':122 'header':86 'includ':140 'infer':49 'infrastructur':52 'insight':145 'json-response' 'key':73 'limit':77 'list':96 'live':209 'lowpaymentfee' 'lowpaymentfee.com':31 'metric':141 'micropayment API' 'network':9,24,70 'no-api-key' 'offer':40 'openapi':190 'page':175 'particular':202 'path':227 'pay':2,17,58 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':57 'payment':85 'per':3,18,59 'platform':6,21,38,137 'post':130 'post-method' 'premium':98,221 'premium API access' 'price':152,172 'prompt':182 'provid':229 'quot':157 'rate':76,155 'readm':174 'render':177 'report':142 'request':60,89,106,131 'request/response':193 'requir':79 'return':102,133,205 'schema':194 'sentiment':146 'settl':64 'simpli':81 'spars':168 'spec':191 'specif':91,228 'summar':149 'text':148 'token':156 'unclear':219 'unit':112 'usdc':15,30,66,114,123 'usdc-settlement' 'util':53 'valid':161 'varieti':42 'via':10,25,211 'wallet':181 'without':215 'x402':11,26,35,84,104 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"f63ab66e-96da-43a3-af55-1c09708e3779","listingId":"8e01c34d-918e-4b47-8a38-92ec4c0b10d1","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/policies/60","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:08.664Z"}],"sources":[{"listingId":"8e01c34d-918e-4b47-8a38-92ec4c0b10d1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/60","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:08.664Z","lastSeenAt":"2026-04-24T00:32:17.067Z"}],"details":{"listingId":"8e01c34d-918e-4b47-8a38-92ec4c0b10d1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/60 \\\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 an x402 challenge requesting up to 20,000 base units of USDC on Base ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/policies/60"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/60"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing paid API endpoints without creating accounts or managing API keys","Making one-off API calls with per-request USDC micropayments on Base","Agent-driven workflows that need frictionless pay-as-you-go API access"],"bestFor":["Developers wanting zero-signup API access with crypto micropayments","AI agents that can autonomously pay for API calls via x402","Users already on the Base network with USDC who want low-friction API consumption"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without USDC on the Base network or an x402-compatible payment flow","High-volume use cases where per-request pricing may not be cost-effective compared to subscription APIs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.086Z"},"updatedAt":"2026-04-24T00:32:17.067Z"}}