{"id":"7f350e39-19fa-4bca-ab6c-f5f7dab02c70","shortId":"X7zCCp","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 that offers dozens of pay-per-request API endpoints spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/178` 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…on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme — no API keys, no rate limits, and no upfront commitments are required. The payment timeout is 300 seconds.\n\nThe broader platform advertises a uniform $0.02/request pricing model across all its endpoints. However, the specific functionality behind this particular \"Premium API Access\" endpoint is not documented in detail. The path suggests it may relate to Stripe subscription management, but no request/response schema or documentation is available beyond the x402 challenge metadata. The docs, pricing, and API pages all appear to require a wallet connection and provide no additional content to unauthenticated crawlers.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","post-method","no-api-key","pay-per-use"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","USDC API access","Base network API","pay-per-request API","micropayment API"],"warnings":["No request or response schema available — the actual functionality of this endpoint is unknown","All documentation pages require wallet connection and returned no useful content to crawlers","The URL path '/api/v1/stripe/subscriptions/178' suggests Stripe subscription management but this is unconfirmed","No OpenAPI spec, no examples, no detailed docs found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/178","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/178","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation of request parameters, response schema, or what the endpoint actually does beyond the label \"Premium API Access\". The docs/pricing/API pages are all gated behind wallet connection and yielded no 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'/request':150 '0.02':110,149 '000':100 '0x8335':105 '20':99 '300':141 '6':115 'Base network API' 'USDC API access' 'accept':88 'access':6,20,36,86,166 'across':153 'addit':212 'advertis':146 'ai/ml':61 'analyt':60 'api':5,19,35,56,85,126,165,200 'appear':203 'avail':190 'base':8,22,73,101,107 'base-network' 'behind':37,161 'beyond':191 'broader':46,144 'call':12,26 'challeng':93,194 'commit':134 'connect':208 'content':213 'cost':97 'crawler':216 'data':59,65 'decim':116 'detail':172 'doc':197 'document':170,188 'dozen':50 'endpoint':30,57,79,156,167 'equal':109 'exact':123 'financ':63 'function':160 'gate':3,17 'howev':157 'indic':94 'infer':62 'infrastructur':67 'key':127 'limit':130 'list':82 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':32 'made':119 'manag':182 'maximum':96 'may':177 'metadata':195 'micropayment API' 'model':152 'network':74 'no-api-key' 'offer':49 'page':201 'paid':9,23 'part':43 'particular':163 'path':174 'pay':53 'pay-per-request':52 'pay-per-request API' 'pay-per-use' 'payment':117,138 'paywal':40 'per':11,25,54,111 'per-cal':10,24 'per-request-pricing' 'platform':47,145 'post':89 'post-method' 'premium':4,18,34,84,164 'price':151,198 'provid':33,210 'rate':129 'relat':178 'request':55,90,112 'request/response':185 'requir':136,205 'schema':186 'scheme':124 'second':142 'settl':70 'span':58 'specif':78,159 'stripe':180 'subscript':181 'suggest':175 'timeout':139 'unauthent':215 'uniform':148 'unit':102 'upfront':133 'usdc':14,28,76,104,113 'usdc-settlement' 'use':75,114 'util':68 'via':120 'wallet':207 'web3':64 'x402':2,16,39,92,122,193 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"2112868f-9914-4bcb-be21-97e31f303ae0","listingId":"7f350e39-19fa-4bca-ab6c-f5f7dab02c70","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/178","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:40.958Z"}],"sources":[{"listingId":"7f350e39-19fa-4bca-ab6c-f5f7dab02c70","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/178","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:40.958Z","lastSeenAt":"2026-04-22T13:31:38.357Z"}],"details":{"listingId":"7f350e39-19fa-4bca-ab6c-f5f7dab02c70","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/178 \\\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 returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/178"},{"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/178"}],"useCases":["Programmatic access to premium API functionality with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API key management","On-chain settled API calls for Web3-native applications"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-friction, per-request billing without subscriptions"],"notFor":["Users who need detailed API documentation before purchasing","Applications requiring free-tier or trial access","Non-crypto users who cannot pay in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.031Z"},"updatedAt":"2026-04-22T13:31:38.357Z"}}