{"id":"dbaa051d-3cc6-4c26-b1f0-cde17e647f0e","shortId":"uwL7DF","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 one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform use the x402 protocol for per-request payment, settling in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/stripe/subscriptions/136` is labeled \"Premium API Access\" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per request. Payment is made via the x402 \"exact\" scheme to a specified wallet address. The endpoint accepts POST requests and returns `application/json` responses.\n\nNotably, the actual functionality behind this particular endpoint path (`/stripe/subscriptions/136`) is unclear — the path suggests a Stripe subscription resource, but the platform's own documentation is extremely sparse (most pages just show \"Connect wallet\" with no further content). There is no OpenAPI schema, no request/response examples, and no detailed documentation available. The endpoint is confirmed live via a valid 402 challenge, but what data or service it actually returns upon successful payment is not documented in any crawled material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API","micropayment API"],"warnings":["No documentation available — all doc/pricing/API pages return only 'Connect wallet' placeholder content","The endpoint path '/api/v1/stripe/subscriptions/136' suggests a Stripe subscription resource but its actual functionality is undocumented","No OpenAPI schema or request/response examples are provided","No input schema is documented; it is unknown what POST body (if any) is expected"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/136","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/136","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind this specific path is entirely unclear. Most site pages return only 'Connect wallet' with no 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'/stripe/subscriptions/136':158 '0.02':124 '000':113 '20':112 '402':208 '6':120 'Base network API' 'USDC API access' 'accept':142 'access':6,20,36,100 'actual':151,216 'address':139 'ai':62 'amount':107 'analyt':61 'api':5,19,35,57,99 'application/json':147 'avail':199 'base':8,22,89,114 'base-network' 'behind':37,153 'call':12,26,110 'categori':58 'challeng':104,209 'confirm':203 'connect':181 'content':186 'crawl':226 'crypto-paid API' 'data':60,212 'decim':121 'detail':197 'document':173,198,223 'endpoint':30,46,71,93,141,156,201 'equat':122 'exact':133 'exampl':194 'extrem':175 'financ':65 'function':152 'gate':3,17 'host':53 'includ':59 'infrastructur':68 'json-response' 'label':97 'learn':64 'live':204 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'made':129 'mani':45 'materi':227 'maximum':106 'micropayment API' 'network':90 'notabl':149 'offer':47 'one':43 'openapi':190 'page':178 'paid':9,23 'particular':155 'path':157,162 'pay-per-call API' 'payment':83,127,220 'paywal':40 'per':11,25,81,109,125 'per-cal':10,24 'per-request':80 'per-request-billing' 'platform':51,74,170 'post':143 'post-method' 'premium':4,18,34,98 'protocol':78 'provid':33 'request':82,126,144 'request/response':193 'requir':108 'resourc':167 'respons':148 'return':146,217 'schema':191 'scheme':134 'servic':214 'settl':84 'show':180 'spars':176 'specif':92 'specifi':137 'stripe':165 'subscript':166 'success':219 'suggest':163 'unclear':160 'unit':115 'upon':218 'usdc':14,28,86,117 'usdc-settlement' 'use':75,119 'util':69 'valid':207 'varieti':55 'via':130,205 'wallet':138,182 'web3':66 'x402':2,16,39,77,103,132 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"c66d8ba3-c9e3-4435-a46e-b38313329d2e","listingId":"dbaa051d-3cc6-4c26-b1f0-cde17e647f0e","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/136","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:28.852Z"}],"sources":[{"listingId":"dbaa051d-3cc6-4c26-b1f0-cde17e647f0e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/136","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:28.852Z","lastSeenAt":"2026-04-22T16:31:56.066Z"}],"details":{"listingId":"dbaa051d-3cc6-4c26-b1f0-cde17e647f0e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/136 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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/136"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/136"}],"useCases":["Accessing premium API resources with per-call USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to gated endpoints using x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional API subscriptions"],"notFor":["Users needing detailed API documentation or schemas before purchasing","Anyone requiring fiat-only payment methods","High-volume consumers who need bulk pricing or rate guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.608Z"},"updatedAt":"2026-04-22T16:31:56.066Z"}}