{"id":"ff66c09d-956e-4873-bceb-5e878f672052","shortId":"WTHUB2","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\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/116` 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: callers include an X-PAYMENT header with a signed payment to the provider's address on Base. No API keys, rate limits, or upfront commitments are required — access is instant upon valid payment.\n\nHowever, the actual functionality behind this particular endpoint is unclear. The endpoint path suggests it relates to Stripe subscriptions, but the provider's landing page does not describe this specific route among its documented APIs. The crawled docs, pricing, and README pages returned only a \"Connect wallet\" prompt with no additional documentation. Without further details on request/response schemas or the endpoint's purpose beyond \"Premium API Access,\" the listing remains a stub. Callers should experiment with POST requests to discover the actual behavior.","tags":[],"capabilities":["x402-payment","usdc-base","per-call-micropayment","http-post","json-response"],"categories":["payments","api-gateway"],"synonyms":["x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","premium API access","crypto-gated endpoint"],"warnings":["No documentation available for this specific endpoint — docs, pricing, and README pages return only 'Connect wallet' with no content.","The endpoint path '/api/v1/stripe/subscriptions/116' is not listed among the provider's documented APIs, making its purpose unclear.","No request or response schema is available; callers must discover behavior experimentally.","No OpenAPI spec or AI plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/116","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/116","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge), but there is no documentation on what the endpoint actually does, no request/response schema, and the crawled pages beyond the landing page are empty. The endpoint path ('stripe/subscriptions/116') does not match any of the documented APIs on the site. This is effectively a stub 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'0.02':96,111 '000':102 '20':101 '6':109 'Base network API' 'USDC micropayment API' 'access':6,20,36,91,148,220 'actual':156,235 'addit':204 'address':135 'ai':62 'among':185 'analyt':61 'api':5,19,35,58,90,139,188,219 'base':8,22,80,103,137 'behavior':236 'behind':72,158 'beyond':217 'call':12,26 'caller':120,226 'commit':145 'connect':199 'cost':93 'crawl':190 'crypto-gated endpoint' 'data':60 'decim':110 'describ':181 'detail':208 'discov':233 'doc':191 'document':187,205 'endpoint':30,47,84,161,165,214 'exact':118 'experi':228 'financ':65 'function':157 'gate':3,17,71 'header':126 'host':54 'howev':154 'http-post' 'includ':121 'infrastructur':68 'instant':150 'json-response' 'key':140 'land':177 'learn':64 'limit':142 'list':87,222 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':63 'made':114 'mani':46 'maxamountrequir':99 'micropay':74 'network':81 'offer':48 'one':44 'page':178,195 'paid':9,23 'particular':160 'path':166 'pay-per-call API' 'payment':40,112,125,130,153 'per':11,25,97 'per-cal':10,24 'per-call-micropayment' 'platform':52 'post':230 'premium':4,18,34,89,218 'premium API access' 'price':192 'prompt':201 'protocol':41 'provid':33,133,175 'purpos':216 'rate':141 'readm':194 'relat':169 'remain':223 'request':98,231 'request/response':210 'requir':147 'return':196 'rout':184 'schema':211 'scheme':119 'settl':75 'sign':129 'span':59 'specif':83,183 'stripe':171 'stub':225 'subscript':172 'suggest':167 'unclear':163 'unit':104 'upfront':144 'upon':151 'usdc':14,28,77,106 'usdc-base' 'util':69 'valid':152 'varieti':56 'via':37,115 'wallet':200 'web3':66 'without':206 'x':124 'x-payment':123 'x402':2,16,39,73,117 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"28aca7e4-443d-4ff7-8e64-f64c42e9da3a","listingId":"ff66c09d-956e-4873-bceb-5e878f672052","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/116","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:16.815Z"}],"sources":[{"listingId":"ff66c09d-956e-4873-bceb-5e878f672052","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/116","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:16.815Z","lastSeenAt":"2026-04-22T19:32:03.215Z"}],"details":{"listingId":"ff66c09d-956e-4873-bceb-5e878f672052","quickStartSnippet":"# The endpoint requires an X-PAYMENT header with a valid x402 payment.\n# First, obtain the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/116\n# Then construct and sign a USDC payment on Base for up to $0.02\n# and resend with the X-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/116"},{"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 address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/116"}],"useCases":["Paying per-call for premium API functionality without API keys or subscriptions","Integrating x402 micropayments into agent workflows on the Base network","Accessing gated services with USDC payments at $0.02 per request"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can sign USDC payments on Base","Users who want pay-as-you-go access without registration"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring guaranteed SLAs or support contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.193Z"},"updatedAt":"2026-04-22T19:32:03.215Z"}}