{"id":"ee8adc1c-9117-4735-94ad-74b5faa98c21","shortId":"jCquvF","kind":"x402","title":"x402-gated premium API access on Base, paid per-call in USDC.","tagline":"x402-gated premium API access on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall, settling payments in USDC on the Base network. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request), consistent with the site's advertised $0.02/request pricing across all its endpoints.\n\nThe provider hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints follow the same x402 payment model: no API keys, no rate limits, and no commitments — just attach an X-PAYMENT header with a valid USDC payment on Base.\n\nThis specific endpoint (/api/v1/stripe/subscriptions/184) is labeled \"Premium API Access\" but its actual functionality is unclear from the available documentation. The crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what this particular subscription endpoint returns. The endpoint is live (returns a valid 402 challenge), but prospective callers should be aware that the concrete behavior behind this path is undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","http-post"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request API","USDC API access","Base network API","micropayment API","lowpaymentfee","crypto-paid API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The specific functionality of /api/v1/stripe/subscriptions/184 is undocumented","No OpenAPI schema or request/response examples provided","No input parameters or output format documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/184","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/stripe/subscriptions/184","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, but there is no OpenAPI schema, no request/response examples, and no documentation explaining what this specific endpoint actually does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':74 '0.02':63,73 '000':58 '20':57 '402':212 'Base network API' 'USDC API access' 'access':6,20,36,157 'across':76 'actual':160 'advertis':72 'ai/ml':95 'analysi':97 'analyt':94 'api':5,19,35,91,127,156,172 'attach':136 'avail':166 'awar':219 'base':8,22,47,59,148 'base-network' 'behavior':223 'behind':37,224 'broad':84 'call':12,26,90 'caller':216 'catalog':85 'challeng':51,213 'classif':99 'commit':134 'concret':222 'connect':180 'consist':67 'content':186 'convers':116 'cost':55 'crawl':169 'crypto-paid API' 'data':93 'descript':197 'doc':170 'document':167 'embed':100 'endpoint':30,79,119,151,203,206 'estim':110 'exampl':194 'exchang':105 'feed':104 'financ':101 'follow':120 'function':161 'gas':109 'gate':3,17 'generat':117 'geocod':114 'header':141 'host':82 'http-post' 'indic':52 'infrastructur':112 'key':128 'label':154 'limit':131 'live':208 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':54 'micropayment API' 'model':125 'network':48 'no-api-key' 'openapi':190 'page':175 'paid':9,23 'particular':201 'path':226 'pay':88 'pay-per-cal':87 'pay-per-call' 'pay-per-request API' 'payment':42,124,140,146 'paywal':40 'per':11,25,65,89 'per-cal':10,24 'premium':4,18,34,155 'price':75,103,171 'prompt':182 'prospect':215 'provid':33,81 'quot':108 'rate':106,130 'readm':174 'request':66 'request/response':193 'return':177,204,209 'schema':191 'sentiment':96 'settl':41 'site':70 'span':92 'specif':150 'subscript':202 'summar':98 'token':107 'unclear':163 'undocu':228 'unit':60 'usd':64 'usdc':14,28,44,62,145 'usdc-settlement' 'util':113 'valid':115,144,211 'wallet':181 'web3':102 'x':139 'x-payment':138 'x402':2,16,39,50,123 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"98b1a8bd-2cad-4f04-b3b7-a291e74af9ac","listingId":"ee8adc1c-9117-4735-94ad-74b5faa98c21","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/stripe/subscriptions/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:34.918Z"}],"sources":[{"listingId":"ee8adc1c-9117-4735-94ad-74b5faa98c21","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/184","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:34.918Z","lastSeenAt":"2026-04-22T15:02:03.471Z"}],"details":{"listingId":"ee8adc1c-9117-4735-94ad-74b5faa98c21","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/184 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/184"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium API services without traditional API key management","Agent-driven workflows that need to pay per call using on-chain USDC","Accessing data, AI, finance, or utility endpoints with minimal friction"],"bestFor":["Developers or agents who want keyless, pay-as-you-go API access","On-chain payment workflows on Base using USDC","Low-cost per-request API consumption without subscriptions"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume use cases where $0.02/request adds up significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.288Z"},"updatedAt":"2026-04-22T15:02:03.471Z"}}