{"id":"f75d66be-e9f4-498b-a2d6-87a663a08369","shortId":"Ngu5YV","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/112` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. It accepts HTTP POST requests and returns JSON.\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per call is 20,000 base units of USDC, which at 6 decimals equals $0.02 USD — consistent with the platform's uniform $0.02/request pricing across all endpoints. No API keys are required; access is granted instantly upon payment. The platform advertises no rate limits and no minimum commitments.\n\nThe endpoint is live and returns a proper 402 challenge with x402 version 1. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input parameters it expects. The platform hosts many endpoints but provides almost no technical documentation for any of them.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","http-post"],"categories":["infrastructure"],"synonyms":["premium API","paid API access","x402 API","USDC API","lowpaymentfee","micropayment API","Base network API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","The exact functionality of /api/v1/generate/resource/112 ('Premium API Access') is unknown; no input parameters or output format documented","No OpenAPI or schema provided for any endpoint on the platform","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/112","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/generate/resource/112","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 no documentation, no OpenAPI schema, no request/response examples, and the purpose of 'Premium API Access' at resource/112 is entirely opaque. All doc pages return only 'Connect wallet' with no 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'/request':17,34,138 '0.02':16,33,129,137 '000':119 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':110 '1':177 '20':118 '402':172 '6':126 'Base network API' 'USDC API' 'accept':89 'access':77,148,216 'across':140 'actual':217 'advertis':156 'ai':59 'almost':232 'amount':113 'analyt':58 'api':5,22,55,76,144,185,215 'base':8,25,105,120 'base-network' 'beyond':85 'call':12,29,116 'challeng':173 'commit':163 'connect':194 'consist':131 'content':200 'contract':109 'data':57 'decim':127 'descript':211 'doc':184 'document':84,179,235 'endpoint':6,23,36,142,165,229 'equal':128 'exact':80 'exampl':208 'expect':224 'extrem':181 'financ':62 'function':81 'gate':3,20 'grant':150 'handl':98 'host':227 'howev':178 'http':90 'http-post' 'infrastructur':65 'input':221 'instant':151 'json':95 'json-response' 'key':145 'label':87 'learn':61 'limit':159 'list':73 'live':167 'lowpaymentfee' 'lowpaymentfee.com':41 'machin':60 'mani':228 'maximum':112 'micropayment API' 'minimum':162 'network':106 'offer':44 'openapi':204 'page':189 'paid API access' 'paramet':222 'part':38 'pay':10,27,52 'pay-per-cal':9,26 'pay-per-request':51 'payment':96,153 'per':11,28,53,115 'platform':42,134,155,226 'post':91 'premium':4,21,75,214 'premium API' 'price':139,186 'prompt':196 'proper':171 'protocol':50,102 'provid':231 'rate':158 'readm':188 'render':191 'request':54,92 'request/response':207 'requir':114,147 'resourc':69 'return':94,169,218 'schema':205 'span':56 'spars':182 'specif':68 'substant':199 'suit':46 'technic':234 'uniform':136 'unit':121 'upon':152 'usd':130 'usdc':14,31,108,123 'usdc-settlement' 'use':107 'util':66 'version':176 'via':99 'wallet':195 'web3':63 'x402':2,19,49,101,175 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"ecca5473-12f5-4cac-a6db-daaf30374e37","listingId":"f75d66be-e9f4-498b-a2d6-87a663a08369","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/generate/resource/112","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:20.321Z"}],"sources":[{"listingId":"f75d66be-e9f4-498b-a2d6-87a663a08369","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/112","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:20.321Z","lastSeenAt":"2026-04-28T17:34:18.697Z"}],"details":{"listingId":"f75d66be-e9f4-498b-a2d6-87a663a08369","quickStartSnippet":"# The endpoint requires an x402 payment header (USDC on Base).\n# 1. Send POST to get the 402 challenge:\ncurl -X POST https://lowpaymentfee.com/api/v1/generate/resource/112\n# 2. Parse the 402 response, construct an X-PAYMENT header\n#    with a signed USDC payment of 20000 base units ($0.02),\n#    then resend the POST with that header.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402 version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/112"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/112"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a pay-per-call premium API resource without needing API keys or subscriptions","Programmatic agent-driven API consumption with on-chain USDC micropayments","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers exploring x402 pay-per-request patterns","Agents that can settle USDC payments on Base","Low-commitment, no-signup API access"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume use cases where $0.02/request adds up without bulk discounts","Anyone who needs to know exactly what the endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.181Z"},"updatedAt":"2026-04-28T17:34:18.697Z"}}