{"id":"2d3a1490-8ea9-4212-8939-221470fc36b9","shortId":"dbVdbd","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 several 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 use the x402 protocol on the Base network, accepting USDC payments with no API keys or rate limits required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/5` is labeled \"Premium API Access\" in the x402 challenge. Its maximum cost is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The endpoint accepts POST requests and returns application/json responses. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network, with a timeout of 300 seconds.\n\nDocumentation 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 name suggests it may relate to Stripe subscription management, but this is speculative. The platform's landing page confirms the general pricing model ($0.02/request, no API keys, no rate limits, Base network), but provides no specifics for this particular endpoint.","tags":[],"capabilities":["x402-payment","usdc-on-base","per-request-billing","no-api-key","json-response"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-request api","USDC api access","Base network api","micropayment api","stripe subscriptions api"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or input/output schema provided; request format is unknown","Endpoint purpose is unclear — 'Premium API Access' and the path '/stripe/subscriptions/5' give no concrete indication of functionality","No examples of request or response payloads available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/5","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/5","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge), but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint actually does. The docs pages are empty beyond a wallet-connect prompt. The endpoint's purpose (\"Premium API Access\" / stripe subscriptions) is 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'/request':217 '0.02':118,216 '000':109 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':135 '20':108 '300':144 '6':114 'Base network api' 'USDC api access' 'accept':80,123 'access':6,20,36,99,183 'actual':184 'addit':166 'address':134 'ai':62 'analyt':61 'api':5,19,35,57,85,98,152,182,219 'application/json':128 'base':8,22,78,110,138,224 'behind':37 'categori':58 'challeng':103 'confirm':211 'connect':161 'content':167 'cost':106 'data':60 'decim':115 'descript':178 'doc':151 'document':146 'endpoint':30,46,71,93,122,192,233 'equal':117 'exampl':175 'expect':190 'extrem':148 'financ':65 'gate':3,17 'general':213 'host':53 'includ':59 'infrastructur':68 'input':188 'json-response' 'key':86,220 'label':96 'land':209 'learn':64 'limit':89,223 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'manag':201 'maximum':105 'may':196 'micropayment api' 'model':215 'name':193 'network':79,139,225 'no-api-key' 'offer':47 'one':43 'openapi':171 'page':156,210 'paid':9,23 'particular':232 'pay-per-request api' 'payment':82,130 'paywal':40 'per':11,25,119 'per-request':10,24 'per-request-billing' 'platform':51,207 'post':124 'premium':4,18,34,97,181 'price':153,214 'prompt':163 'protocol':75 'provid':33,227 'rate':88,222 'readm':155 'relat':197 'render':158 'request':12,26,120,125 'request/response':174 'requir':90 'respons':129 'return':127,185 'schema':172 'second':145 'sent':132 'sever':45 'spars':149 'specif':92,229 'specul':205 'stripe':199 'stripe subscriptions api' 'subscript':200 'suggest':194 'timeout':142 'unit':111 'usdc':14,28,81,113 'usdc-on-base' 'use':72 'util':69 'varieti':55 'wallet':162 'web3':66 'x402':2,16,39,74,102 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d6e1c16b-d399-4d17-97b7-24e6372bbe12","listingId":"2d3a1490-8ea9-4212-8939-221470fc36b9","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/5","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:57.844Z"}],"sources":[{"listingId":"2d3a1490-8ea9-4212-8939-221470fc36b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/5","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:57.844Z","lastSeenAt":"2026-04-22T08:31:38.165Z"}],"details":{"listingId":"2d3a1490-8ea9-4212-8939-221470fc36b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/5 \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/5"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/5"},{"claim":"Payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300 second timeout","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/5"}],"useCases":["Accessing premium API functionality with per-call USDC micropayments on Base","Integrating x402-compatible agents with pay-as-you-go endpoints","Testing x402 protocol payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access on Base","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume production workloads requiring SLAs or support","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.213Z"},"updatedAt":"2026-04-22T08:31:38.165Z"}}