{"id":"6db01988-3d73-46df-83b2-ece2597d38ea","shortId":"qN9nyS","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/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 platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/benefits/8` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title. The x402 challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) on Base, and returns application/json responses. Payment is settled to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.\n\nThe platform's documentation pages appear to require wallet connection and do not expose further technical details about request/response schemas. Without additional documentation, the exact input parameters and response structure for this endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api-gateway","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC API payment","Base network API","lowpaymentfee","micropayment API"],"warnings":["Exact functionality of /api/v1/benefits/8 is undocumented — 'Premium API Access' is the only description available","No request or response schema documented anywhere","Documentation pages require wallet connection and expose no useful content","The purpose and output of this specific endpoint cannot be verified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/8","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of request parameters, response schema, or what 'Premium API Access' actually returns. Docs pages all require wallet connection and provide no 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'/request':16,34 '0.02':15,33,82,139 '000':133 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':156 '20':132 '6':143 'Base network API' 'USDC API payment' 'accept':125 'access':7,25,44,109 'addit':178 'address':155 'ai':66 'analyt':65 'api':6,24,43,94,108 'appear':162 'application/json':149 'base':9,27,90,134,146 'beyond':117 'call':4,22 'categori':62 'challeng':122 'charg':128 'commit':99 'confirm':123 'connect':166 'data':64 'decim':144 'detail':173 'document':116,160,179 'endpoint':38,55,75,103,189 'exact':112,181 'expos':170 'financ':69 'function':113 'given':140 'i.e':138 'includ':63 'infrastructur':72 'input':182 'json-response' 'key':95 'label':106 'learn':68 'limit':97 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':67 'mani':54 'maximum':130 'micropayment API' 'network':10,28,91 'no-api-key' 'no-rate-limit' 'offer':56 'one':52 'page':161 'paramet':183 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payabl':85 'payment':48,151 'per':3,21,83 'platform':59,78,158 'post':126 'premium':5,23,42,107 'premium API' 'price':80 'protocol':13,31,49 'provid':41 'rate':96 'remain':190 'request':84,127 'request/response':175 'requir':100,164 'respons':150,185 'return':148 'schema':176 'settl':153 'span':61 'specif':102 'structur':186 'technic':172 'titl':119 'unit':135 'unknown':191 'usdc':18,36,87,137,141 'usdc-base-network' 'util':73 'via':11,29,45 'wallet':165 'web3':70 'without':177 'x402':12,30,47,121 'x402 endpoint' 'x402-payment'","prices":[{"id":"c137952d-d3d0-4187-bd8f-1a6e3dfdae1b","listingId":"6db01988-3d73-46df-83b2-ece2597d38ea","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/8","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":"6db01988-3d73-46df-83b2-ece2597d38ea","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:35.894Z","lastSeenAt":"2026-04-22T05:31:54.620Z"}],"details":{"listingId":"6db01988-3d73-46df-83b2-ece2597d38ea","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/8 \\\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 advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/8"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/8"}],"useCases":["Accessing premium API features without subscription or API key management","Agent-driven workflows that need instant, keyless API access with crypto payment","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers wanting zero-friction API access without signup","AI agents that can settle payments on Base via x402","Users who prefer pay-per-use over subscription models"],"notFor":["Users who need detailed documentation or guaranteed SLAs","Applications requiring known, well-documented request/response schemas","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.634Z"},"updatedAt":"2026-04-22T05:31:54.620Z"}}