{"id":"3a19db5b-950f-4171-83f5-f776ba3112df","shortId":"VVtC6s","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 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 share a uniform $0.02-per-request pricing model, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/benefits/72` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title. The x402 challenge confirms it is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) to the address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The response MIME type is `application/json`. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment.\n\nThe platform's landing page lists sibling endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no additional technical detail, so the precise input/output schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","premium-api-access"],"categories":["general","api-gateway"],"synonyms":["premium API","lowpaymentfee","x402 API","micropayment API","USDC API","Base network API","pay-per-call"],"warnings":["The exact functionality of /api/v1/benefits/72 ('Premium API Access') is not documented anywhere in the crawled material.","All documentation, pricing, API, and README pages returned only 'Connect wallet' with no technical content.","No OpenAPI spec, input schema, or response examples are available.","The platform lists many endpoints but none appear to have public documentation beyond titles and prices."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/72","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/benefits/72","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 the actual functionality behind \"Premium API Access\" is entirely undocumented. No input/output schema, no examples, and all doc pages return only a wallet-connect prompt. The listing is effectively a stub with confirmed liveness and 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'0.02':10,24,82,136,208 '000':131 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '20':130 '6':141 'Base network API' 'USDC API' 'accept':121 'access':6,20,36,103,163 'addit':225 'address':145 'advertis':162 'ai':66 'analysi':186 'analyt':65 'api':5,19,35,62,102,156 'application/json':154 'base':8,22,93,132,148 'beyond':111,213 'call':61 'challeng':116 'classif':189 'confirm':117 'connect':220 'convers':201 'data':64,182 'decim':142 'detail':227 'document':110,211 'embed':190 'endpoint':30,47,75,97,178,235 'estim':198 'exact':106 'exchang':193 'export':183 'feed':192 'financ':69 'function':107 'gas':197 'gate':3,17,165 'generat':203 'geocod':199 'host':54 'infrastructur':72 'input/output':231 'insight':184 'json-response' 'key':157 'label':100 'land':174,215 'learn':68 'limit':160 'list':176 'live':120 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'mani':46 'metric':180 'micropay':170 'micropayment API' 'mime':151 'model':87 'network':94 'no-api-key' 'offer':48 'one':44 'page':175,212,216 'pay':9,23,59 'pay-per-cal':58 'pay-per-call' 'pay-per-request' 'payment':40,126 'per':11,25,60,84 'per-request':83 'platform':52,78,172 'point':210 'post':122 'precis':230 'premium':4,18,34,101 'premium API' 'premium-api-access' 'price':86,191,209 'prompt':222 'protocol':41 'provid':33 'pure':166 'quot':196 'rate':159,194 'report':181 'request':12,26,85,123 'requir':125 'respons':150 'return':217 'schema':232 'sentiment':185 'settl':88 'share':79 'sibl':177 'sinc':138 'span':63 'specif':96 'summar':188 'technic':226 'text':187 'titl':113 'token':195 'type':152 'uniform':81 'unit':133 'unknown':237 'usd':137 'usdc':14,28,90,135,139 'usdc-base' 'use':140 'util':73 'valid':200 'varieti':56 'via':37 'wallet':221 'web3':70 'x402':2,16,39,115,169 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"fb79183c-671b-4505-91b5-a582e8ba2d5d","listingId":"3a19db5b-950f-4171-83f5-f776ba3112df","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/benefits/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:36.477Z"}],"sources":[{"listingId":"3a19db5b-950f-4171-83f5-f776ba3112df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:36.477Z","lastSeenAt":"2026-04-22T05:31:54.647Z"}],"details":{"listingId":"3a19db5b-950f-4171-83f5-f776ba3112df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/72 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/72"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/72"}],"useCases":["Accessing a premium API resource with a single USDC micropayment on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to undocumented premium content"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.519Z"},"updatedAt":"2026-04-22T05:31:54.647Z"}}