{"id":"621d5ea5-677c-4385-91e9-0b0982f3f183","shortId":"JX3hEs","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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints share a uniform $0.02 per request pricing model, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/charges/41` accepts POST requests and returns JSON. Its exact functionality is not documented beyond the generic \"Premium API Access\" label — it sits under a `/stripe/charges/` path, which suggests it may relate to Stripe charge data or payment processing, but no detailed schema or documentation is available. The x402 challenge confirms the endpoint is live, requesting a maximum of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nThe platform advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve but contain only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method"],"categories":["payments","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","lowpaymentfee","Base network API","stripe charges API","premium API access"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The exact purpose and response format of /api/v1/stripe/charges/41 is unknown","No OpenAPI spec, no input schema, no output schema provided","The 'Premium API Access' label is generic and does not describe what the endpoint actually does"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/41","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and the endpoint's actual functionality is unclear. The docs, pricing, and README pages are all empty beyond a wallet-connect 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'/api/v1/stripe/charges/41':99 '/docs':189 '/pricing':190 '/readme':192 '/request':17,34 '/stripe/charges':123 '0.02':16,33,84,163,166 '000':158 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':172 '20':157 'Base network API' 'USDC micropayment endpoint' 'accept':100 'access':6,23,42,117,186 'actual':208 'address':171 'advertis':177 'ai':71 'analyt':70 'api':5,22,41,67,116,179 'avail':144 'base':8,25,94,159,174 'behind':43 'beyond':112 'call':12,29,168 'challeng':147 'charg':132 'collect':61 'confirm':148 'connect':199 'contain':196 'content':205 'data':69,133 'detail':139 'document':111,142,187 'endpoint':36,52,80,98,150,213 'exact':107 'financ':74 'function':108 'gate':3,20 'generic':114 'host':59 'i.e':165 'infrastructur':77 'instant':185 'json':105 'json-response' 'key':180 'label':118 'learn':73 'limit':183 'live':152 'lowpaymentfee' 'lowpaymentfee.com':38,56 'machin':72 'mani':51 'maximum':155 'may':128 'model':88 'network':95 'offer':53 'one':49 'page':188 'paid':9,26,169 'path':124 'pay':64 'pay-per-call API' 'pay-per-request':63 'payment':135 'paywal':46 'per':11,28,65,85,167 'per-cal':10,27 'platform':57,176 'post':101 'post-method' 'premium':4,21,40,115 'premium API access' 'price':87 'process':136 'prompt':201 'provid':39 'rate':182 'relat':129 'request':66,86,102,153 'request/response':209 'resolv':194 'return':104 'schema':140,210 'settl':89 'share':81 'sit':120 'span':68 'specif':97 'stripe':131 'stripe charges API' 'substant':204 'suggest':126 'uniform':83 'unit':160 'unknown':215 'usdc':14,31,91,162,164 'usdc-base' 'util':78 'wallet':200 'web3':75 'x402':2,19,45,146 'x402 API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"2916c461-85e0-4e1f-beef-0f895f786508","listingId":"621d5ea5-677c-4385-91e9-0b0982f3f183","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:22.852Z"}],"sources":[{"listingId":"621d5ea5-677c-4385-91e9-0b0982f3f183","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/41","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:22.852Z","lastSeenAt":"2026-04-23T00:32:07.609Z"}],"details":{"listingId":"621d5ea5-677c-4385-91e9-0b0982f3f183","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/41 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/41"},{"claim":"Platform advertises $0.02/request pricing 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/41"},{"claim":"Documentation pages resolve but contain only 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API resource 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","Agents that can settle USDC on Base for per-request access","Use cases requiring no API key signup or rate-limit negotiation"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring non-crypto payment methods","Anyone needing to understand the exact response schema before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.614Z"},"updatedAt":"2026-04-23T00:32:07.609Z"}}