{"id":"04ddb439-5c57-4605-b139-64b6263d1fb5","shortId":"f9CLX9","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. The endpoint is live and returns a standard x402 challenge requiring payment in USDC on the Base network. The price for this specific endpoint (/api/v1/stripe/subscriptions/53) is $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme to the specified wallet address, with no API keys or rate limits required.\n\nThe broader lowpaymentfee.com platform advertises a suite of APIs across several categories: 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 $0.02 per request.\n\nHowever, the specific endpoint being listed here (/api/v1/stripe/subscriptions/53) is labeled \"Premium API Access\" and its exact functionality is not documented beyond that title. The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional documentation. Without further details, the actual response payload and use case for this particular subscription endpoint remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","per-call-pricing","no-api-key","http-post"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment endpoint"],"warnings":["No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.","The specific functionality of /api/v1/stripe/subscriptions/53 ('Premium API Access') is undocumented; it is unclear what this endpoint actually returns.","No OpenAPI schema or output schema beyond basic HTTP method metadata.","The endpoint path includes 'stripe/subscriptions' which may imply Stripe integration, but no details are provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/53","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/53","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, but there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality behind \"Premium API Access\" is entirely opaque. The docs/pricing/README pages all render only a wallet-connect prompt with no useful 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'0.02':67,150 '000':71 '20':70 '402 payment endpoint' '6':77 'Base network API' 'USDC API access' 'access':6,20,36,165 'across':109 'actual':198 'addit':192 'address':91 'advertis':104 'ai':119 'analysi':123 'analyt':113 'api':5,19,35,94,108,164 'base':8,22,57,72 'behind':37 'beyond':173 'broader':101 'call':12,26 'case':203 'categori':111 'challeng':50 'classif':126 'connect':187 'convers':143 'crawl':177 'crypto-paid API' 'data':112,116 'decim':78 'detail':196 'doc':178 'document':172,193 'embed':127 'endpoint':30,42,64,146,156,208 'estim':137 'exact':85,168 'exchang':132 'export':117 'feed':131 'financ':128 'function':169 'gas':136 'gate':3,17 'generat':144 'geocod':141 'howev':153 'http-post' 'infrastructur':139 'insight':118 'key':95 'label':162 'learn':121 'limit':98 'list':148,158 'live':44 'lowpaymentfee' 'lowpaymentfee.com':32,102 'machin':120 'made':81 'metric':114 'network':58 'no-api-key' 'page':182 'paid':9,23 'particular':206 'pay-per-call API' 'payload':200 'payment':52,79 'paywal':40 'per':11,25,68,151 'per-cal':10,24 'per-call-pricing' 'platform':103 'premium':4,18,34,163 'price':60,130,179 'prompt':189 'provid':33 'quot':135 'rate':97,133 'readm':181 'remain':209 'report':115 'request':69,152 'requir':51,99 'respons':199 'return':46,184 'scheme':86 'sentiment':122 'sever':110 'specif':63,155 'specifi':89 'standard':48 'subscript':207 'suit':106 'summar':125 'text':124 'titl':175 'token':134 'unclear':210 'unit':73 'usdc':14,28,54,75 'usdc-base' 'use':202 'util':140 'valid':142 'via':82 'wallet':90,188 'web3':129 'without':194 'x402':2,16,39,49,84 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f5adbfc7-3ab3-479b-b146-8941d20bf588","listingId":"04ddb439-5c57-4605-b139-64b6263d1fb5","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/53","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:48.237Z"}],"sources":[{"listingId":"04ddb439-5c57-4605-b139-64b6263d1fb5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/53","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:48.237Z","lastSeenAt":"2026-04-22T12:01:42.932Z"}],"details":{"listingId":"04ddb439-5c57-4605-b139-64b6263d1fb5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/53 \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/53"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API resource paid per-call in USDC on Base","Agent-driven API consumption without traditional API key management","Integrating pay-as-you-go API calls into Web3 workflows"],"bestFor":["Developers wanting keyless, pay-per-request API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on the Base network"],"notFor":["Users who need detailed API documentation before purchasing","Anyone without USDC on Base or an x402-compatible payment client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.683Z"},"updatedAt":"2026-04-22T12:01:42.932Z"}}