{"id":"2aee410e-fae7-4194-a7d3-1e0cf981de19","shortId":"4embWJ","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 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/110` 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 made via the x402 exact scheme on the Base network, settling in USDC (contract 0x8335…2913) to the provider's wallet. The endpoint accepts HTTP 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 substantive 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 live (returns a valid 402 challenge), but without further documentation it is unclear what data or functionality this specific subscription endpoint provides versus the other listed endpoints on the platform.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","http-post","json-response"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","USDC API access","Base network API","micropayment API","crypto-paid 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; it is unknown what this endpoint actually returns.","The endpoint name 'stripe/subscriptions/110' suggests a subscription model, but the x402 challenge uses the 'exact' (one-shot) scheme — the actual behavior is unclear.","Cannot verify what data or service is delivered after payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/110","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/110","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' actually provides. The docs/pricing/README pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'0.02':105 '000':109 '0x8335':137 '20':108 '2913':138 '402':209 '6':119 'Base network API' 'USDC API access' 'accept':146 'access':6,20,36,100,194 'actual':195 'ai':63 'analyt':62 'api':5,19,35,58,83,99,163,193 'application/json':152 'base':8,22,110,115,131 'call':12,26 'categori':59 'challeng':210 'commit':90 'connect':172 'content':178 'contract':136 'cost':102 'crypto-paid API' 'data':61,219 'decim':120 'descript':189 'doc':162 'document':154,214 'endpoint':30,47,72,94,145,203,225,231 'exact':127 'exampl':186 'expect':201 'extrem':159 'financ':66 'function':221 'gate':3,17 'host':54 'http':147 'http-post' 'includ':60 'infrastructur':69 'input':199 'json-response' 'key':84 'label':97 'learn':65 'limit':87 'list':230 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':123 'mani':46 'micropayment API' 'network':132 'no-api-key' 'offer':48 'one':44 'openapi':182 'page':167 'paid':9,23 'pay':78 'pay-per-call api' 'pay-per-request':77 'payment':40,121 'per':11,25,79,106 'per-cal':10,24 'platform':52,75,157,234 'post':148 'premium':4,18,34,98,192 'price':164 'prompt':174 'protocol':41 'provid':33,141,226 'rate':86 'readm':166 'render':169 'request':80,107,149 'request/response':185 'requir':91 'respons':153 'return':151,196,206 'schema':183 'scheme':128 'settl':133 'spars':160 'specif':93,223 'subscript':224 'substant':177 'unclear':217 'unit':111 'usdc':14,28,113,117,135 'usdc-base' 'use':118 'util':70 'valid':208 'varieti':56 'versus':227 'via':37,124 'wallet':143,173 'web3':67 'without':212 'x402':2,16,39,126 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"16e11e5a-773d-49db-a8e1-45a47a1cd2ea","listingId":"2aee410e-fae7-4194-a7d3-1e0cf981de19","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/110","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:17.415Z"}],"sources":[{"listingId":"2aee410e-fae7-4194-a7d3-1e0cf981de19","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/110","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:17.415Z","lastSeenAt":"2026-04-22T19:32:03.272Z"}],"details":{"listingId":"2aee410e-fae7-4194-a7d3-1e0cf981de19","quickStartSnippet":"# The endpoint requires an x402 X-PAYMENT header with a valid USDC payment on Base.\n# 1. Send a POST to get the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/110\n# 2. Parse the 402 response, construct the payment proof, and resend with:\n# -H 'X-PAYMENT: <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 maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/110"},{"claim":"The platform advertises $0.02/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/110"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven API consumption with per-request crypto payments"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on Base network"],"notFor":["Users needing detailed API documentation or schemas before integrating","Anyone without USDC on Base or an x402-compatible payment client","Production workloads requiring SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.186Z"},"updatedAt":"2026-04-22T19:32:03.272Z"}}