{"id":"e4e270dd-168d-49dd-8659-f0077cf1332f","shortId":"PCvTMS","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. The endpoint is live and returns a standard x402 challenge requiring payment in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe provider's landing page advertises a broad suite of APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access via the Base network. However, this specific listing is for the path `/api/v1/stripe/subscriptions/182`, which is described only as \"Premium API Access\" — its exact functionality is not documented beyond the title.\n\nThe endpoint accepts HTTP POST requests and returns `application/json`. Payment is settled on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The x402 challenge specifies version 1, scheme \"exact\", and a 300-second payment timeout. No OpenAPI schema, detailed documentation, or example responses were found for this specific endpoint.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","json-response","http-post"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API access","Base network API","lowpaymentfee","stripe subscription API"],"warnings":["No documentation available for this specific endpoint — its actual functionality is unknown","The path '/api/v1/stripe/subscriptions/182' suggests a Stripe subscription resource but no details are provided","All crawled subpages (docs, api, pricing, README) returned only 'Connect wallet' with no substantive content","No input or output schema is documented; callers cannot know what request body to send"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/182","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/182","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 challenge, but there is no documentation, no OpenAPI schema, no example request/response, and the endpoint's actual functionality (\"Premium API Access\" at a stripe/subscriptions path) is entirely opaque. The crawled docs/pricing/README pages all returned only 'Connect wallet' with no useful 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'0.02':76,129 '000':67 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':189 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':193 '1':201 '20':66 '300':206 '6':72 'Base network API' 'USDC API access' 'accept':174 'access':6,20,36,141,162 'address':188 'advertis':84 'ai':98 'amount':61 'analysi':102 'analyt':92 'api':5,19,35,89,134,161 'application/json':180 'base':8,22,57,68,144,195 'behind':37 'beyond':169 'broad':86 'call':64 'chain':186 'challeng':50,198 'classif':105 'contract':192 'convers':122 'data':91,95 'decim':73 'describ':157 'detail':213 'document':168,214 'embed':106 'endpoint':30,42,125,173,223 'equal':75 'estim':116 'exact':164,203 'exampl':216 'exchang':111 'export':96 'feed':110 'financ':107 'found':219 'function':165 'gas':115 'gate':3,17 'generat':123 'geocod':120 'howev':146 'http':175 'http-post' 'infrastructur':118 'insight':97 'instant':140 'json-response' 'key':135 'land':82 'learn':100 'limit':138 'list':127,149 'live':44 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':99 'maximum':60 'metric':93 'network':58,145 'on-chain':184 'openapi':211 'page':83 'paid':9,23 'path':153 'pay-per-call API' 'payment':52,181,208 'paywal':40 'per':11,25,63,77,130 'per-request':10,24 'per-request-billing' 'post':176 'premium':4,18,34,160 'premium API' 'price':109 'provid':33,80 'quot':114 'rate':112,137 'report':94 'request':12,26,78,131,177 'requir':51,62 'respons':217 'return':46,179 'schema':212 'scheme':202 'second':207 'sentiment':101 'settl':183 'span':90 'specif':148,222 'specifi':199 'standard':48 'stripe subscription API' 'suit':87 'summar':104 'text':103 'timeout':209 'titl':171 'token':113 'unit':69 'usdc':14,28,54,71,191 'usdc-base' 'use':190 'util':119 'valid':121 'version':200 'via':142 'web3':108 'x402':2,16,39,49,197 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"dcffdfaa-18a9-42f6-8b6b-ca6bec01f32c","listingId":"e4e270dd-168d-49dd-8659-f0077cf1332f","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/182","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:43.998Z"}],"sources":[{"listingId":"e4e270dd-168d-49dd-8659-f0077cf1332f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/182","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:43.998Z","lastSeenAt":"2026-04-22T13:31:38.505Z"}],"details":{"listingId":"e4e270dd-168d-49dd-8659-f0077cf1332f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/182 \\\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/182"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/182"}],"useCases":["Accessing a premium API resource with per-request USDC micropayments on Base","Agent-driven API consumption without API keys or account setup","Programmatic access to a gated service 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 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":"2026-02-17T23:13:48.832Z"},"updatedAt":"2026-04-22T13:31:38.505Z"}}