{"id":"899a2889-76e0-4b60-9acd-eb18753bdbe9","shortId":"9ZVWBx","kind":"x402","title":"x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.","tagline":"x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall on the Base network. The specific endpoint `/api/v1/stripe/charges/43` is one of many offered by the provider, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.\n\nPayment is handled via the x402 protocol: callers receive a 402 challenge specifying an \"exact\" payment scheme on Base, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The max amount required is 20,000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised; access is instant once payment is included in the request header.\n\nHowever, the specific functionality of this particular endpoint (`/api/v1/stripe/charges/43`) is unclear. The path suggests it may relate to Stripe charge operations, but no documentation, request schema, or response schema is available beyond the generic \"Premium API Access\" label. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no additional content. Without concrete documentation on what this endpoint accepts or returns, callers should treat this as an exploratory or stub listing.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","no-api-key","no-rate-limit","http-post"],"categories":["payments","infrastructure"],"synonyms":["x402 API","pay-per-request API","USDC micropayment endpoint","Base network API","lowpaymentfee","stripe charges API","402 payment required"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.","The specific functionality of /api/v1/stripe/charges/43 is undocumented; the 'Premium API Access' label is generic.","No request or response schema is provided; callers cannot know what to send or expect back.","The endpoint path references 'stripe/charges' which may imply financial operations — exercise caution."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/43","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/43","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 USDC on Base), but there is no documentation, no request/response schema, and the specific purpose of this endpoint is unknown. The site's docs pages render only wallet-connect prompts with no useful 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'/request':17,34 '0.02':16,33,88,131 '000':126 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':115 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':119 '20':125 '402':103 '402 payment required' '6':134 'Base network API' 'USDC micropayment endpoint' 'accept':220 'access':6,23,42,144,191 'addit':211 'address':114 'advertis':143 'ai/ml':77 'amount':122 'analyt':76 'api':5,22,41,73,137,190,197 'avail':185 'base':8,25,49,111,127 'behind':43 'beyond':186 'broad':66 'call':12,29,72 'caller':100,223 'catalog':67 'challeng':104 'charg':174 'concret':214 'connect':206 'content':212 'contract':118 'data':75,81 'decim':135 'doc':194 'document':178,215 'endpoint':36,53,162,219 'equal':130 'exact':107 'exploratori':229 'financ':79 'function':158 'gate':3,20 'generic':188 'handl':95 'header':154 'host':64 'howev':155 'http-post' 'includ':150 'infer':78 'infrastructur':83 'instant':146 'key':138 'label':192 'limit':141 'list':232 'lowpaymentfee' 'lowpaymentfee.com':38 'mani':58 'max':121 'may':170 'network':50 'no-api-key' 'no-rate-limit' 'offer':59 'one':56 'oper':175 'page':198 'paid':9,26 'particular':161 'path':167 'pay':70,112 'pay-per-cal':69 'pay-per-call' 'pay-per-request API' 'payment':93,108,148 'paywal':46 'per':11,28,71,89 'per-cal':10,27 'premium':4,21,40,189 'price':86,195 'prompt':208 'protocol':99 'provid':39,62 'rate':140 'receiv':101 'relat':171 'render':203 'request':90,153,179 'requir':123 'respons':182 'return':222 'schema':180,183 'scheme':109 'site':201 'span':74 'specif':52,157 'specifi':105 'stripe':173 'stripe charges API' 'stub':231 'suggest':168 'treat':225 'unclear':165 'unit':128 'usdc':14,31,92,117,132 'usdc-base' 'use':116,133 'util':84 'via':96 'wallet':207 'web3':80 'without':213 'x402':2,19,45,98 'x402 API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"85f728a7-9a12-4021-a564-e8f7da7e9e50","listingId":"899a2889-76e0-4b60-9acd-eb18753bdbe9","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/43","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:13.689Z"}],"sources":[{"listingId":"899a2889-76e0-4b60-9acd-eb18753bdbe9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/43","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:13.689Z","lastSeenAt":"2026-04-23T02:01:29.661Z"}],"details":{"listingId":"899a2889-76e0-4b60-9acd-eb18753bdbe9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/43 \\\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 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/43"},{"claim":"All APIs on the site are priced at $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/43"},{"claim":"Docs, pricing, and API pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic per-call API access without subscription or API key management","Agent-driven workflows that need instant, keyless access to paid endpoints","Testing x402 payment flows on Base with low-cost USDC transactions"],"bestFor":["Developers experimenting with x402 payment protocol integrations","AI agents that need frictionless pay-per-call API access","Users who want to avoid API key provisioning and rate limit management"],"notFor":["Production use cases requiring well-documented request/response schemas","Users who need free or subscription-based API access without crypto wallets","Anyone needing detailed documentation on endpoint behavior before calling"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.091Z"},"updatedAt":"2026-04-23T02:01:29.661Z"}}