{"id":"e801d293-dea2-4651-829c-244c09af99c5","shortId":"RTmrPk","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall on the Base network. The site hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on Base. The specific resource `/api/v1/benefits/82` is listed under the site's x402 challenge with a maxAmountRequired of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals).\n\nThe x402 challenge confirms the endpoint is live, accepts POST requests, and returns application/json. Payment is made via the \"exact\" scheme to wallet `0x1A2B…85F3` using USDC (`0x8335…2913`) on Base. No API keys are required; access is granted per-payment with no stated rate limits. The timeout window is 300 seconds.\n\nDocumentation is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. The exact data or functionality returned by `/api/v1/benefits/82` is not documented anywhere in the crawled material. The endpoint path suggests it may be a benefits-related resource (ID 82), but without schema details or example responses, the actual payload is unknown. The site's broader catalog lists analytics, AI, finance, and utility endpoints, but this specific path does not appear in those listings.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","pay-per-call"],"synonyms":["lowpaymentfee","x402 api","micropayment api","pay per call api","usdc api access","base network api","402 payment api"],"warnings":["The exact data or service returned by /api/v1/benefits/82 is unknown — no documentation, schema, or examples exist in crawled material.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","This specific endpoint path does not appear in the site's listed API catalog, making its purpose unclear.","Response schema is entirely unknown; integrators must discover the payload empirically."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/82","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/82","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but the actual functionality of /api/v1/benefits/82 is completely undocumented. No request or response schema is available, and all documentation pages render only a wallet-connect prompt. The endpoint's purpose must be guessed from its URL path 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'0.02':10,29,81,112 '000':106 '0x1a2b':141 '0x8335':145 '20':105 '2913':146 '300':169 '402 payment api' '6':116 '82':222 '85f3':142 'accept':126 'access':6,25,46,154 'actual':231 'addit':191 'ai':242 'ai/ml':70 'analyt':69,241 'anywher':204 'api':5,24,45,66,150,178 'appear':253 'application/json':131 'base':8,27,53,88,107,148 'base network api' 'base-network' 'behind':47 'benefit':218 'benefits-rel':217 'broad':59 'broader':238 'call':65 'catalog':60,239 'challeng':100,120 'confirm':121 'connect':186 'content':192 'crawl':207 'data':68,74,195 'decim':117 'detail':226 'doc':176 'document':171,203 'endpoint':40,123,210,246 'exact':137,194 'exampl':228 'extrem':173 'financ':72,243 'function':197 'gate':3,22 'given':113 'grant':156 'host':57 'i.e':111 'id':221 'infer':71 'infrastructur':76 'json-response' 'key':16,35,151 'limit':19,38,164 'list':94,240,256 'live':125 'lowpaymentfee' 'lowpaymentfee.com':42 'made':134 'materi':208 'maxamountrequir':103 'may':214 'micropayment api' 'network':54 'no-api-key' 'page':181 'path':211,250 'pay':9,28,63 'pay per call api' 'pay-per-cal':62 'pay-per-request' 'payload':232 'payment':132,159 'paywal':50 'per':11,30,64,82,158 'per-pay':157 'post':127 'post-method' 'premium':4,23,44 'price':79,177 'prompt':188 'provid':43 'rate':18,37,163 'readm':180 'relat':219 'render':183 'request':12,31,83,128 'requir':153 'resourc':91,220 'respons':229 'return':130,198 'schema':225 'scheme':138 'second':170 'settl':84 'site':56,97,236 'span':67 'specif':90,249 'state':162 'suggest':212 'thin':174 'timeout':166 'unit':108 'unknown':234 'usdc':14,33,86,110,114,144 'usdc api access' 'usdc-settlement' 'use':143 'util':77,245 'via':135 'wallet':140,187 'web3':73 'window':167 'without':224 'x402':2,21,49,99,119 'x402 api' 'x402-gated':1,20 'x402-payment'","prices":[{"id":"3d36787c-224f-459f-82d3-0d727b6eb605","listingId":"e801d293-dea2-4651-829c-244c09af99c5","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/82","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:35.894Z"}],"sources":[{"listingId":"e801d293-dea2-4651-829c-244c09af99c5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/82","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:35.894Z","lastSeenAt":"2026-04-22T05:31:54.635Z"}],"details":{"listingId":"e801d293-dea2-4651-829c-244c09af99c5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/82 \\\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":"x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/82"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/82"},{"claim":"Site advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages all render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API resource without managing API keys or subscriptions","Agent-driven workflows that need to pay per call using USDC on Base","Exploring x402 protocol integration with low-cost endpoints"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that can settle micropayments in USDC on Base","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Users who need detailed documentation or known response schemas before integrating","High-volume consumers who need bulk pricing or subscription discounts","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.556Z"},"updatedAt":"2026-04-22T05:31:54.635Z"}}