{"id":"1e13a3b5-2790-4605-aa66-4d3ae55ab6d4","shortId":"953hcw","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request 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 specific resource path `/api/v1/stripe/charges/143` suggests a Stripe-related charges endpoint, though the provider's landing page does not document this particular path in detail. The broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and requiring an X-PAYMENT header with an \"exact\" scheme payment. The maximum amount required is 20,000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The provider advertises uniform $0.02/request pricing across all endpoints with no API keys, no rate limits, and instant access. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail, so the actual request/response schema for this specific endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","stripe-charges"],"categories":["finance","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","lowpaymentfee","stripe charges API","Base network API","crypto-paid API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","Documentation pages (/docs, /api, /pricing, /README) all returned only a 'Connect wallet' prompt with no content","The specific path /api/v1/stripe/charges/143 is not listed among the provider's advertised APIs, so its exact functionality is unclear","Request and response formats are entirely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/143","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/charges/143","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC per request). However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty stubs. The specific purpose of `/api/v1/stripe/charges/143` is not documented anywhere in the crawl material, making this effectively a stub 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'/request':164 '0.02':10,24,153,163 '000':141 '0x8335':147 '20':140 '2913':148 '6':157 'Base network API' 'USDC micropayment endpoint' 'accept':120 'access':6,20,36,178 'across':166 'actual':198 'advertis':79,161 'ai':87 'amount':137 'analysi':91 'analyt':86 'api':5,19,35,83,171 'base':8,22,47,142,150 'base-network' 'behind':37 'beyond':181 'broader':76 'challeng':114 'charg':59 'classif':93 'confirm':115 'connect':188 'contract':146 'convers':110 'crypto-paid API' 'data':85 'decim':158 'detail':74,195 'document':69,179 'embed':94 'endpoint':30,60,117,168,204 'equal':152 'estim':104 'exact':132 'exchang':99 'feed':98 'financ':95 'gas':103 'gate':3,17 'generat':111 'geocod':108 'given':154 'header':129 'infrastructur':106 'instant':177 'key':172 'land':65,183 'learn':89 'limit':175 'live':119 'lowpaymentfee' 'lowpaymentfee.com':32,77 'machin':88 'maximum':136 'network':48 'no-api-key' 'page':66,180,184 'particular':71 'path':52,72 'pay':9,23 'pay-per-call API' 'payment':42,128,134 'paywal':40 'per':11,25 'per-request-pricing' 'platform':78 'post':121 'premium':4,18,34 'price':97,165 'prompt':190 'provid':33,63,160 'quot':102 'rate':100,174 'relat':58 'request':12,26,122 'request/response':199 'requir':124,138 'resourc':51 'return':185 'schema':200 'scheme':133 'sentiment':90 'settl':41 'span':84 'specif':50,203 'stripe':57 'stripe charges API' 'stripe-charges' 'stripe-rel':56 'suggest':54 'suit':81 'summar':92 'technic':194 'though':61 'token':101 'uniform':162 'unit':143 'unknown':206 'usdc':14,28,44,145,155 'usdc-settlement' 'util':107 'valid':109 'wallet':189 'web3':96 'x':127 'x-payment':126 'x402':2,16,39,113 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"025d025b-b844-4c7a-9f08-f3435eafbcf1","listingId":"1e13a3b5-2790-4605-aa66-4d3ae55ab6d4","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/charges/143","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:05.860Z"}],"sources":[{"listingId":"1e13a3b5-2790-4605-aa66-4d3ae55ab6d4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/143","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:05.860Z","lastSeenAt":"2026-04-25T23:32:33.197Z"}],"details":{"listingId":"1e13a3b5-2790-4605-aa66-4d3ae55ab6d4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/143 \\\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 returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/143"},{"claim":"USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/143"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Landing page lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a Stripe charges resource with per-call USDC micropayments","Agent-driven API consumption without API key management","Integrating pay-per-use endpoints into automated workflows on Base"],"bestFor":["Developers wanting keyless, pay-per-request API access","AI agents that can settle x402 payments in USDC on Base","Projects needing low-friction, low-cost API calls without subscriptions"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who prefer flat-rate or subscription pricing","Developers not set up for on-chain USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.455Z"},"updatedAt":"2026-04-25T23:32:33.197Z"}}