{"id":"e5b88e78-a351-40df-b7fd-c00d17b2d93c","shortId":"KqNqAb","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. The provider operates a suite of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required; callers simply attach an x402 payment header to each request.\n\nThe specific endpoint `/api/v1/stripe/charges/114` is listed under the title \"Premium API Access.\" Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no description of what this particular endpoint actually returns. The name \"stripe/charges/114\" suggests it may relate to Stripe charge data or a payment-processing wrapper, but this is speculative. Prospective callers should be aware that the actual functionality behind this endpoint is undocumented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","json-response","http-post"],"categories":["api","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-request api","USDC micropayment api","base network api","premium api access","stripe charges api"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format.","The purpose of '/api/v1/stripe/charges/114' is unclear; 'Premium API Access' is a generic label that does not describe functionality.","No examples of successful responses are available anywhere in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/114","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/114","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 with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation of what the endpoint actually does or returns, and the docs/pricing/README pages are all empty wallet-connect stubs. The endpoint name 'stripe/charges/114' is opaque without further 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'/api/v1/stripe/charges/114':105 '/docs':165 '/pricing':167 '/readme':169 '/request':17,34 '0.02':16,33,72,132 '000':122 '0x8335':127 '20':121 '300':145 '6':136 'USDC micropayment api' 'accept':150 'access':6,23,42,113 'actual':199,229 'advertis':117 'ai/ml':61 'analyt':60 'api':5,22,41,57,83,112 'application/json':155 'attach':94 'awar':226 'base':8,25,80,123,129 'base network api' 'behind':43,231 'beyond':157 'call':12,29,56 'caller':92,223 'challeng':116 'charg':210 'commit':89 'connect':175 'data':59,65,211 'decim':137 'descript':193 'detail':182 'document':156 'endpoint':36,104,149,198,233 'equal':131 'exact':142 'extrem':162 'financ':63 'function':230 'gate':3,20 'given':133 'header':98 'http':151 'http-post' 'infer':62 'infrastructur':67 'json-response' 'key':84 'land':159 'limit':86 'list':107 'lowpaymentfee' 'lowpaymentfee.com':38 'maxamountrequir':119 'may':206 'name':202 'network':81 'openapi':186 'oper':49 'page':160,170 'paid':9,26 'particular':197 'pay':54 'pay-per-cal':53 'pay-per-call' 'pay-per-request api' 'payment':97,139,215 'payment-process':214 'paywal':46 'per':11,28,55,73 'per-cal':10,27 'post':152 'premium':4,21,40,111 'premium api access' 'price':70 'process':216 'prompt':177 'prospect':222 'provid':39,48 'rate':85 'relat':207 'render':172 'request':74,101 'request/response':189 'requir':91 'return':154,200 'schema':190 'scheme':140 'second':146 'settl':75 'simpli':93 'span':58 'spars':163 'spec':187 'specif':103 'specul':221 'stripe':209 'stripe charges api' 'stripe/charges/114':203 'suggest':204 'suit':51 'technic':181 'timeout':147 'titl':110 'undocu':235 'unit':124 'upfront':88 'usdc':14,31,77,126,134 'usdc-base' 'util':68 'wallet':176 'web3':64 'wrapper':217 'x402':2,19,45,96,115 'x402 api' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"e270202d-2dd6-4902-8c0e-b8a23b822a27","listingId":"e5b88e78-a351-40df-b7fd-c00d17b2d93c","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/114","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:53:55.597Z"}],"sources":[{"listingId":"e5b88e78-a351-40df-b7fd-c00d17b2d93c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/114","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:53:55.597Z","lastSeenAt":"2026-04-22T07:01:20.083Z"}],"details":{"listingId":"e5b88e78-a351-40df-b7fd-c00d17b2d93c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/114 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network with scheme 'exact'.","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/114"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The docs, api, pricing, and README pages render only a 'Connect wallet' prompt with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access without subscriptions","Testing x402 payment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocols","Agents that need frictionless pay-per-call API access without API key management","Low-volume consumers who prefer micropayments over subscriptions"],"notFor":["Users who need well-documented API contracts and response schemas before integrating","High-volume production workloads where per-call crypto settlement overhead matters","Anyone who needs to understand the exact response format before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.928Z"},"updatedAt":"2026-04-22T07:01:20.083Z"}}