{"id":"258008ca-314d-44ee-aa63-a0ad084c42b9","shortId":"8eBNRT","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/186` 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 sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the \"exact\" scheme with a 300-second timeout.\n\nImportant caveat: the crawled documentation pages (docs, api, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation describing what this specific endpoint actually returns or what input parameters it expects. The endpoint name references \"stripe/charges\" which may relate to Stripe payment processing, but this is speculative. The platform's landing page confirms the $0.02 per-request pricing and the no-API-key, no-rate-limit model, but provides no further technical detail for this particular endpoint.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","no-api-key","post-endpoint"],"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 return only 'Connect wallet' with no content","No OpenAPI or input/output schema provided; request parameters and response format are unknown","The endpoint path 'stripe/charges/186' is unexplained and may relate to Stripe payment processing, but this is unconfirmed","Platform appears to be a demonstration or early-stage project with many listed endpoints but no substantive docs"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/186","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/186","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty (showing only 'Connect wallet'). The actual functionality of this specific endpoint is unclear — the name 'stripe/charges/186' is 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'0.02':136,227 '000':125 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '0x8335':130 '20':124 '2913':131 '300':155 '6':141 'Base network API' 'USDC API access' 'accept':113 'access':6,20,36,111 'actual':196 'address':147 'ai':62 'analyt':61 'api':5,19,35,57,93,110,165,236 'base':8,22,89,126,133 'behind':37 'call':12,26 'caller':81 'categori':58 'caveat':159 'challeng':118 'commit':100 'confirm':225 'connect':172 'content':178 'cost':122 'crawl':161 'data':60 'decim':142 'describ':191 'detail':189,248 'doc':164 'document':162,190 'endpoint':30,46,71,104,195,205,252 'equal':135 'exact':151 'exampl':186 'expect':203 'financ':65 'follow':75 'gate':3,17 'host':53 'import':158 'includ':59 'indic':119 'infrastructur':68 'input':200 'key':94,237 'land':223 'learn':64 'limit':97,241 'list':107 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'mani':45 'maximum':121 'may':210 'micropayment API' 'model':80,242 'name':206 'network':90 'no-api-key':234 'no-rate-limit':238 'offer':47 'one':43 'openapi':182 'page':163,224 'paid':9,23 'paramet':201 'particular':251 'pay':82 'pay-per-call API' 'payment':79,143,214 'paywal':40 'per':11,25,83,137,229 'per-cal':10,24 'per-request':228 'per-request-billing' 'platform':51,74,221 'post':114 'post-endpoint' 'premium':4,18,34,109 'price':166,231 'process':215 'prompt':174 'provid':33,244 'rate':96,240 'readm':167 'refer':207 'relat':211 'request':84,115,138,230 'request/response':185 'requir':101 'return':169,197 'schema':183 'scheme':152 'second':156 'sent':145 'specif':103,194 'specul':219 'stripe':213 'stripe charges API' 'stripe/charges':208 'substant':177 'technic':247 'timeout':157 'unit':127 'usdc':14,28,86,129,139 'usdc-base' 'use':140,149 'util':69 'varieti':55 'wallet':173 'web3':66 'x402':2,16,39,78,117 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"64f154e8-3b02-4155-835b-dae32ca73a96","listingId":"258008ca-314d-44ee-aa63-a0ad084c42b9","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/186","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:18.634Z"}],"sources":[{"listingId":"258008ca-314d-44ee-aa63-a0ad084c42b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/186","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:18.634Z","lastSeenAt":"2026-04-22T07:01:21.710Z"}],"details":{"listingId":"258008ca-314d-44ee-aa63-a0ad084c42b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/186 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/186"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/186"}],"useCases":["Programmatic access to a premium API endpoint without needing API key registration","Agent-driven workflows that pay per call using USDC on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC payments on Base L2","Use cases requiring no-signup, pay-as-you-go API access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Applications requiring free or fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.914Z"},"updatedAt":"2026-04-22T07:01:21.710Z"}}