{"id":"13868e43-140e-4ab5-8648-dbd863baf947","shortId":"cddbDA","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 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) with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/policies/27` is listed under the umbrella \"Premium API Access\" but its exact functionality is not documented in the available crawl material. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC on Base (0x8335…2913), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schema for this endpoint is unknown. Without documentation on what data or service this specific policy endpoint returns, agents should treat this as a low-information listing. The platform advertises instant access with no rate limits and settlement on the Base L2 network.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","micropayment API"],"warnings":["No documentation available — all doc pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt","The exact purpose and response format of /api/v1/policies/27 is unknown","No OpenAPI spec or output schema beyond basic HTTP method info","Cannot verify what data or service is actually returned upon successful payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/27","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/policies/27","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 pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific function of /api/v1/policies/27 is undisclosed. All doc pages return only 'Connect wallet' with no 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'/api/v1/policies/27':94 '/docs':166 '/pricing':167 '/readme':169 '0.02':10,24,72,144 '000':133 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':155 '0x8335':140 '20':132 '2913':141 '300':158 '6':148 'Base network API' 'USDC API access' 'accept':123 'access':6,20,36,102,217 'actual':183 'address':154 'advertis':215 'agent':203 'ai':60 'analyt':59 'api':5,19,35,82,101 'avail':112 'base':8,22,44,134,139,226 'base-network' 'categori':68 'challeng':117 'coin':79 'commit':89 'confirm':118 'connect':174 'content':180 'crawl':113 'data':58,195 'decim':149 'document':109,164,192 'endpoint':30,51,93,120,188,201 'equal':143 'exact':105 'financ':63 'function':106 'gate':3,17 'given':145 'inform':211 'infrastructur':66 'instant':216 'key':83 'l2':227 'learn':62 'limit':86,221 'list':96,212 'live':122 'low':210 'low-inform':209 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':61 'mani':50 'materi':114 'micropayment API' 'network':45,228 'no-api-key' 'offer':52 'one':48 'page':165 'paid':75 'pay':9,23 'pay-per-call API' 'payment':40,128,150 'per':11,25,73 'per-request-pricing' 'platform':55,162,214 'polici':200 'post':124 'post-method' 'premium':4,18,34,100 'premium API' 'price':70 'prompt':176 'protocol':41 'provid':33 'rate':85,220 'request':12,26,74,125 'request/response':184 'requir':90,127 'return':171,202 'schema':185 'second':159 'sent':152 'servic':197 'settlement':223 'span':57 'specif':92,199 'substant':179 'timeout':160 'treat':205 'umbrella':99 'unit':135 'unknown':190 'usd':78 'usdc':14,28,77,137,146 'usdc-settlement' 'util':67 'via':37 'wallet':175 'web3':64 'without':191 'x402':2,16,39,116 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"5da1f752-3e6a-4dac-9fdb-f33103333074","listingId":"13868e43-140e-4ab5-8648-dbd863baf947","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/policies/27","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:51:48.736Z"}],"sources":[{"listingId":"13868e43-140e-4ab5-8648-dbd863baf947","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/27","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:51:48.736Z","lastSeenAt":"2026-04-23T05:01:27.319Z"}],"details":{"listingId":"13868e43-140e-4ab5-8648-dbd863baf947","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/27 \\\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":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/27"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/27"},{"claim":"Documentation pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Agents needing on-demand API access without pre-registration or API keys","Pay-per-request access to a premium data or service endpoint","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers exploring x402 payment-gated APIs","Agents that can settle USDC payments on Base","Low-cost per-request API consumption without subscriptions"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","Use cases requiring known, well-documented response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:03.061Z"},"updatedAt":"2026-04-23T05:01:27.319Z"}}