{"id":"bc1c5bfa-05bb-4b09-8621-8dca7fabd978","shortId":"btKAzX","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\" via the x402 payment protocol. 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 are pay-per-request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/147` is labeled \"Premium API Access\" and costs up to $0.02 per request (20,000 base units of USDC on Base, where USDC uses 6 decimals). Payment is settled on the Base network using USDC (contract `0x8335...2913`) via the x402 exact payment scheme. The endpoint accepts POST requests and returns `application/json` responses.\n\nDocumentation on the platform is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input it expects. The endpoint is confirmed live (returns a valid 402 challenge), but the actual functionality behind the paywall is unknown from available materials.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","USDC api access","Base network api","micropayment api","premium api"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or input/output schema provided; actual functionality behind the paywall is unknown","The endpoint path includes 'stripe/subscriptions' which may imply subscription management, but this is unconfirmed","Cannot verify what data or service is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/147","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/147","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the endpoint actually does beyond the label 'Premium API Access'. Effectively a stub 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'0.02':105 '000':109 '0x8335':131 '20':108 '2913':132 '402':204 '6':119 'Base network api' 'USDC api access' 'accept':141 'access':6,20,36,100,188 'actual':189,208 'addit':171 'ai':63 'analyt':62 'api':5,19,35,58,83,99,157,187 'application/json':146 'avail':216 'base':8,22,110,115,126 'base-network' 'behind':210 'categori':59 'challeng':205 'commit':90 'confirm':199 'connect':166 'content':172 'contract':130 'cost':102 'data':61 'decim':120 'descript':183 'doc':156 'document':148 'endpoint':30,47,72,94,140,197 'exact':136 'exampl':180 'expect':195 'extrem':153 'financ':66 'function':209 'gate':3,17 'host':54 'includ':60 'infrastructur':69 'input':193 'json-response' 'key':84 'label':97 'learn':65 'limit':87 'live':200 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'mani':46 'materi':217 'micropayment api' 'network':127 'no-api-key' 'offer':48 'one':44 'openapi':176 'page':161 'paid':9,23 'pay':78 'pay-per-call api' 'pay-per-request':77 'payment':40,121,137 'paywal':212 'per':11,25,79,106 'per-request':10,24 'platform':52,75,151 'post':142 'post-method' 'premium':4,18,34,98,186 'premium api' 'price':158 'prompt':168 'protocol':41 'provid':33 'rate':86 'readm':160 'render':163 'request':12,26,80,107,143 'request/response':179 'requir':91 'respons':147 'return':145,190,201 'schema':177 'scheme':138 'settl':123 'spars':154 'specif':93 'unit':111 'unknown':214 'usdc':14,28,113,117,129 'usdc-settlement' 'use':118,128 'util':70 'valid':203 'varieti':56 'via':37,133 'wallet':167 'web3':67 'x402':2,16,39,135 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"71918f4e-87c4-4534-8063-a217fa2ea9e7","listingId":"bc1c5bfa-05bb-4b09-8621-8dca7fabd978","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/147","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:28.861Z"}],"sources":[{"listingId":"bc1c5bfa-05bb-4b09-8621-8dca7fabd978","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/147","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:28.861Z","lastSeenAt":"2026-04-22T16:31:56.095Z"}],"details":{"listingId":"bc1c5bfa-05bb-4b09-8621-8dca7fabd978","quickStartSnippet":"# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.\n# Using curl (you need an x402 client to generate the payment header):\ncurl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/147 \\\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 endpoint returns a valid x402 402 challenge with USDC on Base, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/147"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/147"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API key management","Programmatic access to gated services using x402 payment protocol"],"bestFor":["Developers or agents wanting keyless, pay-as-you-go API access","x402-compatible agents that can settle USDC payments on Base","Users who prefer no-commitment, no-subscription API billing"],"notFor":["Users who need detailed API documentation or schemas before purchasing","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or rate guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.574Z"},"updatedAt":"2026-04-22T16:31:56.095Z"}}