{"id":"44aa7477-776a-42a1-a7f0-d7a05ce29a37","shortId":"7PBwBd","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 payment wall. 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 payable per-request via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/173` is listed as \"Premium API Access\" and requires a payment of up to 20,000 base units of USDC (0.02 USD) per request. The x402 challenge confirms it accepts POST requests, settles on the Base network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and uses the \"exact\" payment scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-call micropayments.\n\nHowever, the actual functionality behind this specific endpoint is unclear. The path suggests a Stripe subscription resource, but the platform's own documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what data or service this endpoint returns. The platform landing page lists many other endpoints at $0.02 each but does not specifically describe this subscription endpoint's behavior. Treat this listing as a stub until more documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-call-billing","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — docs, pricing, and README pages all return only a 'Connect wallet' prompt with no content.","The actual functionality of /api/v1/stripe/subscriptions/173 is unknown; the path suggests a Stripe subscription resource but no details are provided.","No OpenAPI schema or request/response examples are available.","No input schema documented — unclear what POST body is expected."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/173","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/173","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, confirming pricing and network details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of this specific endpoint is undocumented. The docs, pricing, and README pages all returned only 'Connect wallet' with no content. This is effectively a stub 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'0.02':108,222 '000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':127 '20':102 '300':136 'Base network API' 'USDC micropayment endpoint' 'accept':117 'access':6,20,36,94,147 'actual':158 'address':126 'advertis':146 'ai':62 'analyt':61 'api':5,19,35,58,93,140 'avail':244 'base':8,22,81,104,123 'base-network' 'becom':243 'behavior':233 'behind':37,160 'call':12,26,154 'challeng':114 'confirm':115 'connect':186 'content':192 'crypto-paid API' 'data':60,207 'describ':228 'descript':204 'detail':203 'doc':180 'document':178,242 'endpoint':30,47,87,163,211,220,231 'exact':131 'exampl':200 'financ':65 'function':159 'gate':3,17 'grant':149 'host':54 'howev':156 'infrastructur':68 'key':141 'land':215 'learn':64 'limit':144 'list':90,217,236 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':63 'mani':46,218 'micropay':155 'network':82,124 'no-api-key' 'offer':48 'one':44 'openapi':196 'page':179,216 'paid':9,23 'path':167 'pay-per-call API' 'payabl':71 'payment':40,98,132 'per':11,25,73,110,153 'per-cal':10,24,152 'per-call-billing' 'per-request':72 'platform':52,175,214 'post':118 'premium':4,18,34,92 'price':181 'prompt':188 'protocol':78 'provid':33 'pure':150 'rate':143 'readm':182 'request':74,111,119 'request/response':199 'requir':96 'resourc':172 'return':183,212 'schema':197 'scheme':133 'second':137 'servic':209 'settl':120 'span':59 'specif':86,162,227 'stripe':170 'stub':239 'subscript':171,230 'substant':191 'suggest':168 'timeout':138 'treat':234 'unclear':165 'unit':105 'usd':109 'usdc':14,28,84,107 'usdc-micropayment' 'use':83,129 'util':69 'varieti':56 'via':75 'wall':41 'wallet':187 'web3':66 'x402':2,16,39,77,113 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"420f3e72-bae4-4ed9-916c-4aadf55f789b","listingId":"44aa7477-776a-42a1-a7f0-d7a05ce29a37","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/173","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:36.104Z"}],"sources":[{"listingId":"44aa7477-776a-42a1-a7f0-d7a05ce29a37","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/173","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:36.104Z","lastSeenAt":"2026-04-22T15:02:03.562Z"}],"details":{"listingId":"44aa7477-776a-42a1-a7f0-d7a05ce29a37","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/173 \\\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 network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/173"},{"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/173"},{"claim":"Documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to a subscription-related resource without traditional API key management"],"bestFor":["Developers or agents already holding USDC on Base who want frictionless API access","Use cases requiring no-signup, no-rate-limit API consumption","x402-compatible agent toolchains"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","Production systems requiring well-documented request/response contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.263Z"},"updatedAt":"2026-04-22T15:02:03.562Z"}}