{"id":"2762d658-7463-4484-9c8a-170bb8528565","shortId":"rKzFkK","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. It is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories — all priced at $0.02 per request paid in USDC (USD Coin) on Base.\n\nThe specific endpoint `/api/v1/benefits/33` is listed under the title \"Premium API Access\" but its exact functionality is not documented in the available crawl material. The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a 300-second timeout.\n\nThe platform advertises a simple pay-per-use model: no API keys, no rate limits, no minimums, and instant access. However, documentation pages (docs, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schema for this endpoint is unknown. Without knowing what data or service `/api/v1/benefits/33` returns, agents should treat this as a loosely documented endpoint.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint","premium-api"],"categories":["api","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium access","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The exact functionality of /api/v1/benefits/33 ('Premium API Access') is undocumented — no request or response schema is available.","All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no substantive content.","The endpoint path '/api/v1/benefits/33' does not match any of the named endpoints listed on the homepage, so its purpose is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/33","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/33","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 zero documentation on what /api/v1/benefits/33 actually does or returns. All doc pages render only 'Connect wallet' with no content. The request/response schema is completely unknown, making this effectively a stub 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'0.02':10,28,80,135 '000':130 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':149 '20':129 '300':154 '6':140 'Base network API' 'USDC micropayment API' 'accept':121 'access':6,24,44,101,177 'actual':197 'address':148 'advertis':159 'agent':213 'ai':68 'analyt':67 'api':5,16,23,34,43,100,168 'avail':111 'base':8,26,52,89,131,151 'call':143 'categori':76 'challeng':116 'charg':125 'coin':87 'confirm':117 'connect':188 'content':194 'crawl':112 'data':66,208 'decim':141 'doc':181 'document':108,179,220 'endpoint':38,59,92,202,221 'exact':104 'financ':71 'function':105 'gate':3,21 'howev':178 'infrastructur':74 'instant':176 'key':17,35,169 'know':206 'learn':70 'limit':172 'list':95 'live':120 'loos':219 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':69 'mani':58 'materi':113 'maximum':127 'minimum':174 'model':166 'network':53 'no-api-key' 'offer':60 'one':56 'page':180 'paid':83 'pay':9,27,163 'pay-per-call API' 'pay-per-request' 'pay-per-us':162 'payment':48,144 'per':11,29,81,142,164 'platform':63,158 'post':122 'post-endpoint' 'premium':4,22,42,99 'premium-api' 'price':78,182 'prompt':190 'protocol':49 'provid':41 'rate':171 'readm':183 'request':12,30,82,123 'request/response':198 'requir':18,36 'return':185,212 'schema':199 'second':155 'sent':146 'servic':210 'simpl':161 'sinc':137 'span':65 'specif':91 'substant':193 'timeout':156 'titl':98 'treat':215 'unit':132 'unknown':204 'usd':86,136 'usdc':14,32,85,134,138 'usdc-base' 'use':139,165 'util':75 'via':45 'wallet':189 'web3':72 'without':205 'x402':2,20,47,115 'x402 premium access' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"baa975af-a933-469a-b304-074fb3a2a41f","listingId":"2762d658-7463-4484-9c8a-170bb8528565","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:33.455Z"}],"sources":[{"listingId":"2762d658-7463-4484-9c8a-170bb8528565","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/33","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:33.455Z","lastSeenAt":"2026-04-22T02:31:44.471Z"}],"details":{"listingId":"2762d658-7463-4484-9c8a-170bb8528565","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/33 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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/33"},{"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/33"},{"claim":"Payment is sent to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/benefits/33"}],"useCases":["Programmatic access to a premium API resource with per-request USDC micropayments","Agent-driven workflows that need keyless, on-demand API access settled on Base","Demonstrating x402 payment protocol integration for pay-per-use endpoints"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can settle USDC payments on Base L2","Use cases requiring keyless, no-signup API access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring known, well-documented request/response schemas","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.516Z"},"updatedAt":"2026-04-22T02:31:44.471Z"}}