{"id":"8c2253f4-d3b8-4088-84fe-85336d22593c","shortId":"sjVXDc","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 on the Base network. It is one of many endpoints offered by the lowpaymentfee.com platform, which advertises a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and instant access.\n\nThe specific endpoint `/api/v1/stripe/charges/106` accepts POST requests and is gated by an x402 challenge requiring payment in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). The maximum amount required is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). Payment is made via the \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nHowever, the actual functionality behind this specific endpoint path (`/stripe/charges/106`) is unclear. The site's landing page lists many API categories but does not specifically document this path. The docs, API, pricing, and README pages all returned minimal content (just \"Connect wallet\"), so there is no detailed documentation available for what this endpoint returns or what input it expects. The endpoint is confirmed live via the 402 challenge, but its precise purpose beyond the generic \"Premium API Access\" label cannot be determined from available materials.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","per-call-pricing","post-endpoint","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","USDC API access","pay-per-call API","Base network API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all return minimal 'Connect wallet' content","The specific purpose of /api/v1/stripe/charges/106 is undocumented; 'Premium API Access' is a generic label","No request body schema or response schema available","No OpenAPI specification found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/106","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC per call). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of this endpoint path is unknown. The docs and other site pages returned only 'Connect wallet' with no useful 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'/stripe/charges/106':153 '0.02':76,124 '000':117 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':108 '20':116 '300':141 '402':210 '6':127 'Base network API' 'USDC API access' 'accept':93 'access':6,20,36,88,221 'actual':146 'address':137 'advertis':57 'ai':65 'amount':113 'analyt':64 'api':5,19,35,61,81,163,174,220 'avail':192,227 'base':8,22,43,110,118 'base-network' 'behind':37,148 'beyond':216 'call':12,26 'cannot':223 'categori':164 'challeng':102,211 'confirm':206 'connect':184 'content':182 'contract':107 'data':63 'decim':128 'detail':190 'determin':225 'doc':173 'document':169,191 'endpoint':30,50,91,151,196,204 'equal':123 'exact':134 'expect':202 'financ':68 'function':147 'gate':3,17,98 'generic':218 'howev':144 'infrastructur':71 'input':200 'instant':87 'key':82 'label':222 'land':159 'learn':67 'limit':85 'list':161 'live':207 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':32,54 'machin':66 'made':131 'mani':49,162 'materi':228 'maximum':112 'micropayment API' 'minim':181 'network':44 'no-api-key' 'offer':51 'one':47 'page':160,178 'paid':9,23 'path':152,171 'pay-per-call API' 'payment':104,129 'paywal':40 'per':11,25,77 'per-cal':10,24 'per-call-pricing' 'platform':55 'post':94 'post-endpoint' 'precis':214 'premium':4,18,34,219 'price':74,175 'provid':33 'purpos':215 'rate':84 'readm':177 'request':78,95 'requir':103,114 'return':180,197 'scheme':135 'second':142 'site':157 'span':62 'specif':90,150,168 'suit':59 'timeout':143 'unclear':155 'unit':119 'usdc':14,28,106,121,125 'usdc-payment' 'use':126 'util':72 'via':132,208 'wallet':185 'web3':69 'x402':2,16,39,101 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d704dcb2-52ab-48bc-ad2b-1aacc9353059","listingId":"8c2253f4-d3b8-4088-84fe-85336d22593c","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:51.905Z"}],"sources":[{"listingId":"8c2253f4-d3b8-4088-84fe-85336d22593c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/106","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:51.905Z","lastSeenAt":"2026-04-23T05:01:31.490Z"}],"details":{"listingId":"8c2253f4-d3b8-4088-84fe-85336d22593c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/106 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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/106"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/106"},{"claim":"The site offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents needing keyless API access with crypto micropayments","Users who want pay-per-use pricing without subscriptions"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring high-throughput with predictable flat-rate pricing","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:57.052Z"},"updatedAt":"2026-04-23T05:01:31.490Z"}}