{"id":"727689d4-5475-4b36-a2a3-7cb31f236bdc","shortId":"rSypcb","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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform follow the same x402 payment model: callers pay per request in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/stripe/charges/109` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout window.\n\nImportant caveat: the endpoint's actual functionality is unclear. The path suggests it may relate to Stripe charge operations, but no documentation, request schema, or response schema is available beyond the x402 challenge metadata. The platform's docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. Without further documentation it is impossible to confirm what data or service this endpoint returns upon successful payment.","tags":[],"capabilities":["x402-payment","usdc-base","per-call-billing","post-endpoint","no-api-key"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","micropayment API","stripe charges API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet' with no content.","Endpoint functionality is unknown; the path '/api/v1/stripe/charges/109' is unexplained.","No request or response schema provided; callers cannot know what to send or expect back.","No OpenAPI spec, no AI plugin manifest, and no agents.txt discovered."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/109","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/109","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what the endpoint actually does. The docs, API, pricing, and README pages are all empty beyond a wallet-connect prompt, making this effectively a stub 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'0.02':136 '000':125 '0x8335':130 '20':124 '2913':131 '300':158 '6':141 'Base network API' 'USDC API access' 'accept':113 'access':6,20,36,111 'actual':167 'addit':214 'address':155 'ai':62 'analyt':61 'api':5,19,35,57,93,110,200 'avail':190 'base':8,22,89,126,133 'behind':37 'beyond':191 'call':12,26 'caller':81 'categori':58 'caveat':163 'challeng':118,194 'charg':179 'commit':100 'confirm':224 'connect':209 'cost':122 'data':60,226 'decim':142 'detail':216 'doc':199 'document':183,219 'endpoint':30,46,71,104,165,230 'equal':135 'exact':149 'financ':65 'follow':75 'function':168 'gate':3,17 'host':53 'import':162 'imposs':222 'includ':59 'indic':119 'infrastructur':68 'key':94 'learn':64 'limit':97 'list':107 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'made':145 'mani':45 'maximum':121 'may':175 'metadata':195 'micropayment API' 'model':80 'network':90 'no-api-key' 'offer':47 'one':43 'oper':180 'page':204 'paid':9,23 'path':172 'pay':82 'pay-per-call API' 'payment':79,143,234 'payto':154 'paywal':40 'per':11,25,83,137 'per-cal':10,24 'per-call-billing' 'platform':51,74,197 'post':114 'post-endpoint' 'premium':4,18,34,109 'price':201 'prompt':211 'provid':33 'rate':96 'readm':203 'relat':176 'render':206 'request':84,115,138,184 'requir':101 'respons':187 'return':231 'schema':185,188 'scheme':150 'second':159 'servic':228 'specif':103 'specifi':153 'stripe':178 'stripe charges API' 'success':233 'suggest':173 'technic':215 'timeout':160 'unclear':170 'unit':127 'upon':232 'usdc':14,28,86,129,139 'usdc-base' 'use':140 'util':69 'varieti':55 'via':146 'wallet':210 'web3':66 'window':161 'without':217 'x402':2,16,39,78,117,148,193 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"08ed1eb1-851b-4fdd-ba5b-8dbd064cb7d4","listingId":"727689d4-5475-4b36-a2a3-7cb31f236bdc","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/109","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:56.217Z"}],"sources":[{"listingId":"727689d4-5475-4b36-a2a3-7cb31f236bdc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/109","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:56.217Z","lastSeenAt":"2026-04-22T07:01:20.107Z"}],"details":{"listingId":"727689d4-5475-4b36-a2a3-7cb31f236bdc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/109\n# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment proof to access.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/109"},{"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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/109"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-request for premium API functionality without needing an API key","Integrating x402-compatible agents that settle in USDC on Base","Accessing gated endpoints with crypto micropayments"],"bestFor":["Developers or agents already using x402 payment flows","Users who want keyless, pay-as-you-go API access","Base/USDC holders looking for low-friction API consumption"],"notFor":["Users who need detailed API documentation before integrating","Anyone requiring fiat-only payment methods","Production workloads that need SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.9Z"},"updatedAt":"2026-04-22T07:01:20.107Z"}}