{"id":"b33bc684-b0b7-4c74-a51d-04569e7740a9","shortId":"PErrqG","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 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which advertises a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/86` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required. Payment is made inline via the X-PAYMENT header per the x402 protocol.\n\nHowever, the actual functionality behind this particular endpoint is unclear. The path suggests a Stripe subscription resource, but the provider's description simply says \"Premium API Access\" with no further documentation. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no explanation of what data or service this endpoint returns. Agents should be aware that while the endpoint is live and responds with a valid x402 challenge, the lack of documentation makes it difficult to know what to expect from a successful paid request.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","micropayment API","crypto-gated endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all return only 'Connect wallet' with no content.","The actual functionality of /api/v1/stripe/subscriptions/86 is undocumented; the path name suggests Stripe subscription management but this is unconfirmed.","No OpenAPI schema or request/response examples are provided by the platform.","No robots.txt or agents.txt found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/86","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/86","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 essentially no documentation: no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does. The docs pages are empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':122 '0.02':106,121 '000':95 '0x8335':100 '20':94 '2913':101 '6':111 'Base network API' 'USDC API access' 'accept':87 'access':6,20,36,180 'across':125 'actual':156 'advertis':53 'agent':222 'ai':61 'analyt':60 'api':5,19,35,57,130,179,187 'awar':225 'base':8,22,77,96,103 'base-network' 'behind':37,158 'call':108 'challeng':238 'charg':91 'commit':138 'confirm':118 'connect':196 'content':202 'crypto-gated endpoint' 'data':59,216 'decim':112 'descript':175 'difficult':245 'doc':186 'document':184,242 'endpoint':30,46,85,127,161,220,229 'equal':105 'exampl':210 'expect':250 'explan':213 'financ':64 'flat':120 'function':157 'gate':3,17,70 'header':149 'howev':154 'infrastructur':67 'inlin':143 'key':131 'know':247 'lack':240 'land':116 'learn':63 'limit':134 'live':231 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':62 'made':142 'make':243 'mani':45 'micropayment API' 'minimum':137 'model':124 'network':78 'offer':47 'one':43 'openapi':206 'page':117,191 'paid':9,23,254 'particular':160 'path':165 'pay-per-request API' 'payment':140,148 'paywal':40 'per':11,25,107,150 'per-request':10,24 'per-request-pricing' 'platform':51,114 'post':88 'post-method' 'premium':4,18,34,178 'price':123,188 'prompt':198 'protocol':74,153 'provid':33,173 'rate':133 'readm':190 'request':12,26,89,255 'request/response':209 'requir':139 'resourc':170 'respond':233 'return':193,221 'say':177 'schema':207 'servic':218 'settl':80 'simpli':176 'span':58 'specif':84 'stripe':168 'subscript':169 'substant':201 'success':253 'suggest':166 'suit':55 'unclear':163 'unit':97 'usdc':14,28,82,99,109 'usdc-settlement' 'use':110 'util':68 'valid':236 'via':71,144 'wallet':197 'web3':65 'x':147 'x-payment':146 'x402':2,16,39,73,152,237 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"48c9784e-8295-4f3c-8e2c-09d72b461e98","listingId":"b33bc684-b0b7-4c74-a51d-04569e7740a9","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/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:00.260Z"}],"sources":[{"listingId":"b33bc684-b0b7-4c74-a51d-04569e7740a9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:00.260Z","lastSeenAt":"2026-04-22T09:01:35.513Z"}],"details":{"listingId":"b33bc684-b0b7-4c74-a51d-04569e7740a9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/86\n# Returns 402 with x402 challenge. Include X-PAYMENT header with a valid payment proof to access.","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/86"},{"claim":"The platform charges $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/86"}],"useCases":["Programmatic access to a premium API resource with per-call USDC payment on Base","Agent-driven API consumption without API keys or account setup","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 protocol integrations","Agents that can settle USDC payments on Base L2","Use cases needing keyless, pay-as-you-go API access"],"notFor":["Users who need detailed API documentation before committing payment","Applications requiring guaranteed SLAs or support contracts","Non-crypto workflows that cannot settle on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.139Z"},"updatedAt":"2026-04-22T09:01:35.513Z"}}