{"id":"0a848ce9-4aa9-459f-ac86-b7a968f33f21","shortId":"6Sjzfz","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid 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 endpoint `/api/v1/stripe/charges/70` is listed under the provider's broader platform, which offers dozens of API endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe x402 challenge for this particular endpoint advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per call. The payment scheme is \"exact\" on the Base L2 network, with a 300-second timeout. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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 schema, no request/response examples, and no description of what the `/api/v1/stripe/charges/70` endpoint actually returns. The endpoint name suggests it may relate to Stripe charge data, but this is speculative. The provider's landing page lists many endpoint categories but does not describe individual endpoint behavior or response formats.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","post-method"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API","crypto-paid endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or output schema describing what this endpoint returns.","The endpoint path '/api/v1/stripe/charges/70' is not listed among the provider's advertised APIs on the landing page, making its purpose unclear.","No request body schema or response examples are available anywhere in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/70","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what this specific endpoint actually does. The docs pages are empty. This is effectively a stub 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'0.02':81,109 '000':96 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':102 '20':95 '300':124 '6':105 'Base network API' 'USDC API' 'access':6,20,36 'actual':187 'advertis':91 'ai':70 'analyt':69 'api':5,19,35,65,128,155 'asset':101 'attach':137 'base':8,22,47,97,119 'base-network' 'behavior':219 'behind':37 'broader':59 'call':111 'caller':135 'categori':212 'challeng':86 'charg':198 'connect':164 'content':170 'crypto-paid endpoint' 'data':68,199 'decim':106 'describ':216 'descript':181 'doc':154 'document':149 'dozen':63 'endpoint':30,51,66,90,186,190,211,218 'equat':107 'exact':116 'exampl':178 'extrem':151 'financ':73 'format':222 'gate':3,17 'header':142 'individu':217 'infrastructur':76 'key':129 'l2':120 'land':207 'learn':72 'limit':132 'list':54,209 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':71 'mani':210 'maxamountrequir':93 'may':194 'micropayment API' 'name':191 'network':48,121 'no-api-key' 'offer':62 'openapi':174 'page':159,208 'paid':9,23 'particular':89 'pay-per-call API' 'payment':42,113,141,147 'paywal':40 'per':11,25,82,110 'per-request':10,24 'per-request-pricing' 'platform':60 'post-method' 'premium':4,18,34 'price':79,156 'prompt':166 'proof':148 'provid':33,57,205 'rate':131 'readm':158 'relat':195 'render':161 'request':12,26,83 'request/response':177 'requir':134 'respons':221 'return':188 'schema':175 'scheme':114 'second':125 'settl':41 'simpli':136 'span':67 'spars':152 'specif':50 'specul':203 'stripe':197 'suggest':192 'timeout':126 'unit':98 'usdc':14,28,44,100 'usdc-settlement' 'use':104 'util':77 'valid':145 'wallet':165 'web3':74 'x':140 'x-payment':139 'x402':2,16,39,85,146 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"3b61ac22-4ccf-4150-b009-924cd3bbf79a","listingId":"0a848ce9-4aa9-459f-ac86-b7a968f33f21","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:31.280Z"}],"sources":[{"listingId":"0a848ce9-4aa9-459f-ac86-b7a968f33f21","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:31.280Z","lastSeenAt":"2026-04-22T07:31:35.737Z"}],"details":{"listingId":"0a848ce9-4aa9-459f-ac86-b7a968f33f21","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/70 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network, equating to $0.02.","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/70"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The provider lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Integrating pay-as-you-go API calls into agent workflows without API key management","Testing x402 protocol payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume production workloads requiring SLA guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.251Z"},"updatedAt":"2026-04-22T07:31:35.737Z"}}