{"id":"05681ef0-1d4f-4b1d-8a42-ba5dbfcb8e40","shortId":"MAvsnH","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 pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform use the x402 protocol on the Base network, settling payments in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/127` is labeled \"Premium API Access\" in the x402 challenge. Its maximum required payment is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The endpoint accepts POST requests and returns application/json. Payment is made via the x402 \"exact\" scheme to the specified wallet address on Base.\n\nThe platform advertises a simple pricing model of $0.02 per request across all endpoints, with no API keys, no rate limits, no minimums, and instant access. However, the documentation pages (docs, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual functionality behind this specific \"Premium API Access\" endpoint is unclear. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawl.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The actual functionality of 'Premium API Access' at this specific endpoint is unknown","No OpenAPI schema or request/response examples provided","No input parameters or expected output format documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/127","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/127","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, confirming it exists and accepts payments. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind \"Premium API Access\" is completely undocumented. The docs, pricing, and README pages all returned only a wallet-connect prompt with no 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'0.02':119,153 '000':110 '20':109 '6':115 'Base network API' 'USDC API access' 'accept':124 'access':6,20,36,99,170,198 'across':156 'actual':191 'address':142 'advertis':147 'ai':66 'analyt':65 'api':5,19,35,62,98,161,197 'application/json':129 'avail':214 'base':8,22,85,111,144 'base-network' 'behind':193 'call':61 'challeng':103 'connect':182 'content':188 'crawl':217 'crypto-paid API' 'data':64 'decim':116 'detail':212 'doc':175 'document':173,213 'endpoint':30,47,75,93,123,158,199 'equal':118 'exact':136 'exampl':209 'financ':69 'function':192 'gate':3,17 'host':54 'howev':171 'infrastructur':72 'instant':169 'json-response' 'key':162 'label':96 'learn':68 'limit':165 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'made':132 'mani':46 'maximum':105 'minimum':167 'model':151 'network':86 'offer':48 'one':44 'openapi':205 'page':174 'paid':9,23 'pay':59 'pay-per-cal':58 'pay-per-call API' 'pay-per-request' 'payment':40,88,107,130 'per':11,25,60,120,154 'per-request':10,24 'platform':52,78,146 'post':125 'post-method' 'premium':4,18,34,97,196 'premium API' 'price':150,176 'prompt':184 'protocol':41,82 'provid':33 'rate':164 'readm':177 'request':12,26,121,126,155 'request/response':208 'requir':106 'return':128,179 'schema':206 'scheme':137 'settl':87 'simpl':149 'span':63 'specif':92,195 'specifi':140 'substant':187 'unclear':201 'unit':112 'usdc':14,28,90,114 'usdc-settlement' 'use':79 'util':73 'varieti':56 'via':37,133 'wallet':141,183 'web3':70 'x402':2,16,39,81,102,135 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"84307e40-f58e-4ae7-b372-1409a5bb7acb","listingId":"05681ef0-1d4f-4b1d-8a42-ba5dbfcb8e40","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/127","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:25.279Z"}],"sources":[{"listingId":"05681ef0-1d4f-4b1d-8a42-ba5dbfcb8e40","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/127","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:25.279Z","lastSeenAt":"2026-04-22T18:04:20.925Z"}],"details":{"listingId":"05681ef0-1d4f-4b1d-8a42-ba5dbfcb8e40","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/127 \\\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/127"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/127"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to gated services using x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional subscriptions"],"notFor":["Users needing detailed API documentation before purchasing","Anyone without a Base-compatible USDC wallet","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.744Z"},"updatedAt":"2026-04-22T18:04:20.925Z"}}