{"id":"b90d1783-8e8e-4f8e-8322-d53ac9bf0579","shortId":"LUQC2X","kind":"x402","title":"x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at `/api/v1/claims/27` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific endpoint is labeled \"Premium API Access\" and is gated behind an x402 payment challenge requiring USDC on the Base network.\n\nThe platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access. The x402 challenge captured for this endpoint shows a `maxAmountRequired` of 20,000 base units of USDC (contract `0x8335…2913` on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout.\n\nHowever, the specific functionality of `/api/v1/claims/27` is unclear. The endpoint path does not match any of the documented API routes listed on the homepage (analytics, AI, finance, utils). The description is simply \"Premium API Access\" with no further documentation, input schema, or example responses available. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. Without knowing what this endpoint actually returns, agents should treat this as a stub listing until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method"],"categories":["api","misc"],"synonyms":["premium API","x402 endpoint","lowpaymentfee","pay-per-call API","USDC API","Base network API","micropayment API"],"warnings":["The specific purpose and response format of /api/v1/claims/27 is unknown — it does not match any documented route on the site.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no useful content.","No OpenAPI spec, input schema, or example responses are available.","The endpoint path '/api/v1/claims/27' suggests a resource-specific route but its domain is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/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/claims/27","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but the specific functionality of /api/v1/claims/27 is completely undocumented. No input schema, no output schema, no example responses, and no description beyond the generic 'Premium API Access' label. The docs pages are empty. This is effectively a 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'0.02':10,24,90,130 '000':118 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x8335':124 '20':117 '2913':125 '300':149 '6':134 'Base network API' 'USDC API' 'access':70,105,186 'across':93 'actual':219 'addit':212 'address':145 'advertis':87 'agent':221 'ai':55,177 'analyt':54,176 'api':5,19,51,69,98,170,185,201 'avail':196 'base':8,22,83,119,127 'behind':74 'captur':109 'challeng':78,108 'collect':42 'connect':207 'content':213 'contract':123 'data':53 'decim':135 'descript':181 'doc':198 'document':169,190,231 'endpoint':6,20,30,65,95,112,161,218 'equal':129 'exact':142 'exampl':194 'financ':58,178 'flat':89 'function':155 'gate':3,17,73 'given':131 'homepag':175 'howev':152 'infrastructur':61 'input':191 'instant':104 'json-response' 'key':99 'know':215 'label':67 'learn':57 'limit':102 'list':172,228 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':56 'made':138 'match':165 'maxamountrequir':115 'micropayment API' 'network':84 'offer':40 'page':202 'part':34 'path':162 'pay':9,23,48 'pay-per-call API' 'pay-per-request':47 'payment':77,136 'per':11,25,49,91 'platform':38,86 'post-method' 'premium':4,18,68,184 'premium API' 'price':199 'prompt':209 'protocol':46 'rate':101 'render':204 'request':12,26,50,92 'requir':79 'respons':195 'return':220 'rout':171 'schema':192 'scheme':143 'second':150 'show':113 'simpli':183 'span':52 'specif':64,154 'stub':227 'surfac':232 'timeout':151 'treat':223 'unclear':159 'unit':120 'usdc':14,28,80,122,132 'usdc-base' 'util':62,179 'via':139 'wallet':208 'web3':59 'without':214 'x402':2,16,45,76,107,141 'x402 endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':44","prices":[{"id":"7907fe6b-2de4-495d-bd83-d963dff0f2c6","listingId":"b90d1783-8e8e-4f8e-8322-d53ac9bf0579","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/claims/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":"2026-04-18T18:45:44.655Z"}],"sources":[{"listingId":"b90d1783-8e8e-4f8e-8322-d53ac9bf0579","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/27","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:44.655Z","lastSeenAt":"2026-04-22T07:00:55.905Z"}],"details":{"listingId":"b90d1783-8e8e-4f8e-8322-d53ac9bf0579","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/27 \\\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":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/27"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/claims/27"},{"claim":"Available API categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a pay-per-request API without needing API keys or subscriptions","Making programmatic calls with instant USDC micropayments on Base","Exploring x402-protocol gated services"],"bestFor":["Agents or developers wanting keyless, pay-per-call API access","Users who prefer crypto micropayments over subscription billing","Testing x402 protocol integrations"],"notFor":["Users who need detailed documentation or guaranteed SLAs before purchasing","Anyone needing to understand the exact response schema before calling","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.646Z"},"updatedAt":"2026-04-22T07:00:55.905Z"}}