{"id":"16ff1ac6-b717-41f6-8d6c-b98f3efb1d80","shortId":"86tjYg","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 part of a broader platform offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network, payable in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/179` is listed as \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 exact scheme to a designated wallet address on Base. The endpoint accepts POST requests and returns application/json. No API keys or rate limits are advertised; access is purely pay-per-call.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input it expects. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what functionality this specific subscription endpoint provides beyond the generic label.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-call","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-gated API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The purpose and functionality of 'Premium API Access' at this specific subscription endpoint is entirely unclear","No examples of expected input or output"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/179","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/subscriptions/179","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 402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' actually does. The docs/pricing/README pages are all empty beyond a wallet connect prompt. This is effectively a stub 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'0.02':89,104 '000':95 '20':94 '402':195 '6':102 'Base network API' 'USDC API access' 'accept':122 'access':6,20,36,84,136,180 'actual':181 'address':117 'advertis':135 'ai':54 'analyt':53 'api':5,19,35,50,83,129,149,179 'application/json':127 'base':8,22,70,96,119 'base-network' 'behind':37 'beyond':210 'broader':46 'call':12,26,142 'categori':51 'challeng':196 'connect':158 'content':164 'cost':86 'crypto-gated API' 'data':52 'decim':103 'descript':175 'design':115 'doc':148 'document':143,199 'endpoint':30,77,121,189,208 'exact':111 'exampl':172 'expect':187 'extrem':145 'financ':57 'function':204 'gate':3,17,63 'generic':212 'infrastructur':60 'input':185 'json-response' 'key':130 'label':213 'learn':56 'limit':133 'list':80 'live':191 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':55 'made':107 'maxamountrequir':92 'micropayment API' 'multipl':49 'network':71 'offer':48 'openapi':168 'page':153 'paid':9,23 'part':43 'pay':140 'pay-per-cal':139 'pay-per-call' 'pay-per-call API' 'payabl':72 'payment':105 'paywal':40 'per':11,25,90,141 'per-cal':10,24 'platform':47 'post':123 'post-method' 'premium':4,18,34,82,178 'price':150 'prompt':160 'protocol':67 'provid':33,209 'pure':138 'rate':132 'readm':152 'render':155 'request':91,124 'request/response':171 'return':126,182,192 'schema':169 'scheme':112 'spars':146 'specif':76,206 'subscript':207 'substant':163 'unclear':202 'unit':97 'usdc':14,28,74,99 'usdc-payment' 'util':61 'valid':194 'via':64,108 'wallet':116,159 'web3':58 'without':198 'x402':2,16,39,66,110 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"1b41528c-6a3e-4eaa-ad01-153dcaa4f7ef","listingId":"16ff1ac6-b717-41f6-8d6c-b98f3efb1d80","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/subscriptions/179","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:34.312Z"}],"sources":[{"listingId":"16ff1ac6-b717-41f6-8d6c-b98f3efb1d80","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/179","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:34.312Z","lastSeenAt":"2026-04-22T15:02:03.470Z"}],"details":{"listingId":"16ff1ac6-b717-41f6-8d6c-b98f3efb1d80","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/179 \\\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/subscriptions/179"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/179"}],"useCases":["Accessing premium API functionality with per-call USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic access to gated endpoints using x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","Anyone without a Base-compatible USDC wallet","High-volume use cases where subscription pricing would be cheaper"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.295Z"},"updatedAt":"2026-04-22T15:02:03.470Z"}}