{"id":"40465ee8-2b30-42c9-bb45-2aeb479c3990","shortId":"tAjdU6","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all payable per-request in USDC on the Base network with no API keys or rate limits required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/159` is listed as \"Premium API Access\" and returns a valid x402 challenge (version 1, scheme \"exact\") requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's advertised flat pricing. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what this particular endpoint actually returns. The endpoint name suggests it may relate to Stripe subscription management, but this is speculative. The platform's landing page confirms the pay-per-use model and lists sibling endpoints, but provides no technical detail about request formats or response payloads for any of them.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 API","USDC pay-per-call","Base network API","micropayment API","premium API access","stripe subscriptions"],"warnings":["No documentation available — all doc/pricing/API/README pages render only 'Connect wallet' with no content","No OpenAPI or input/output schema provided; request and response formats are unknown","The endpoint path '/api/v1/stripe/subscriptions/159' suggests Stripe subscription functionality but this is unconfirmed","The actual functionality behind 'Premium API Access' is completely undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/159","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/159","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 zero documentation on what it does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The listing is effectively a 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'0.02':124 '000':107 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':140 '0x8335':112 '1':100 '20':106 '2913':113 '300':143 '6':119 'Base network API' 'USDC pay-per-call' 'access':6,20,36,92 'actual':184 'address':139 'advertis':132 'ai':56 'analyt':55 'api':5,19,35,51,77,91,152 'base':8,22,73,108,115 'behind':37 'broader':47 'categori':52 'challeng':98 'confirm':206 'connect':161 'consist':127 'content':167 'data':54 'decim':120 'descript':178 'detail':221 'doc':151 'document':146 'endpoint':30,85,183,187,216 'exact':102 'exampl':175 'extrem':148 'financ':59 'flat':133 'format':224 'gate':3,17 'includ':53 'infrastructur':62 'key':78 'land':204 'learn':58 'limit':81 'list':88,214 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':57 'manag':196 'may':191 'micropayment API' 'model':212 'multipl':50 'name':188 'network':74 'no-api-key' 'offer':49 'openapi':171 'page':156,205 'paid':9,23 'part':44 'particular':182 'pay':209 'pay-per-us':208 'payabl':65 'payload':227 'payment':40,135 'per':11,25,67,125,210 'per-request':10,24,66 'per-request-billing' 'platform':48,130,202 'post-method' 'premium':4,18,34,90 'premium API access' 'price':134,153 'prompt':163 'provid':33,218 'rate':80 'readm':155 'relat':192 'render':158 'request':12,26,68,103,126,223 'request/response':174 'requir':82 'respons':226 'return':94,185 'schema':172 'scheme':101 'second':144 'sent':137 'sibl':215 'sinc':116 'spars':149 'specif':84 'specul':200 'stripe':194 'stripe subscriptions' 'subscript':195 'suggest':189 'technic':220 'timeout':145 'translat':122 'unit':109 'usdc':14,28,70,111,117 'usdc-base' 'use':118,211 'util':63 'valid':96 'version':99 'wall':41 'wallet':162 'web3':60 'x402':2,16,39,97 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"8333edd0-9332-4aba-a90f-c38fe85c3fc1","listingId":"40465ee8-2b30-42c9-bb45-2aeb479c3990","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/159","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:28.276Z"}],"sources":[{"listingId":"40465ee8-2b30-42c9-bb45-2aeb479c3990","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/159","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:28.276Z","lastSeenAt":"2026-04-22T16:31:56.063Z"}],"details":{"listingId":"40465ee8-2b30-42c9-bb45-2aeb479c3990","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/159 \\\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/159"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/159"},{"claim":"Docs, API, pricing, and README pages all show only 'Connect wallet' 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, pay-as-you-go API access on Base","Integrating x402-compatible payment flows into automated pipelines"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC on Base for per-call access","Use cases requiring no-signup, no-API-key access"],"notFor":["Users who need detailed API documentation or response schemas before integrating","Production workloads requiring SLA guarantees or support","Non-crypto users who cannot pay in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.608Z"},"updatedAt":"2026-04-22T16:31:56.063Z"}}