{"id":"656a3d41-1c61-4491-a7b9-e8777ecaf2f1","shortId":"Bm9kmz","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. The specific resource `/api/v1/claims/74` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC (USD Coin) on Base with no API keys, rate limits, or upfront commitments.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. The response MIME type is `application/json` and the timeout is 300 seconds.\n\nHowever, the specific functionality behind `/api/v1/claims/74` is unclear — the description is simply \"Premium API Access\" with no further documentation, input schema, or example responses available. The provider's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical content. Without knowing what this particular claims endpoint returns, agents should treat this as an opaque paid JSON endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-on-base","per-request-billing","json-response","no-api-key","post-method"],"categories":["general","api-gateway"],"synonyms":["premium API","paid API access","x402 endpoint","USDC micropayment API","lowpaymentfee","claims API","Base network API"],"warnings":["No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet' with no technical content.","The specific functionality of /api/v1/claims/74 is unknown; 'Premium API Access' is the only description provided.","No input schema or example responses are available, making it impossible to know what data to send or expect back.","The provider lists many diverse endpoints (AI, finance, analytics, utilities) all at $0.02 — it is unclear whether these are fully implemented services."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/74","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/74","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 the x402 challenge is well-formed with clear pricing, but there is no documentation, no input/output schema, and no indication of what '/api/v1/claims/74' actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':10,28,86,148 '000':139 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':125 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':130 '20':138 '300':159 '6':144 'Base network API' 'USDC micropayment API' 'accept':114 'access':6,24,44,175 'addit':203 'address':124 'agent':214 'ai':73 'amount':135 'analyt':72 'api':5,16,23,34,43,98,174,192 'application/json':154 'avail':185 'base':8,26,52,95,132,140 'behind':165 'categori':69 'chain':122 'challeng':107 'claim':211 'claims API' 'coin':93 'commit':104 'confirm':108 'connect':198 'content':205 'contract':129 'data':71 'decim':145 'descript':170 'doc':189 'document':179,226 'endpoint':38,62,82,110,212,223 'equal':147 'exampl':183 'financ':76 'function':164 'gate':3,21 'howev':161 'includ':70 'infrastructur':79 'input':180 'json':222 'json-response' 'key':17,35,99 'know':207 'learn':75 'limit':101 'live':112 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':74 'mani':61 'maximum':134 'mime':151 'network':53 'no-api-key' 'offer':63 'on-chain':120 'one':59 'opaqu':220 'page':193 'paid':221 'paid API access' 'particular':210 'pay':9,27 'payabl':89 'payment':48,117 'per':11,29,87 'per-request-billing' 'post':115 'post-method' 'premium':4,22,42,173 'premium API' 'price':84,190 'prompt':200 'protocol':49 'provid':41,66,187 'rate':100 'render':195 'request':12,30,88,116 'requir':18,36,136 'resourc':56 'respons':150,184 'return':213 'schema':181 'second':160 'settl':119 'simpli':172 'span':68 'specif':55,163 'surfac':227 'technic':204 'timeout':157 'treat':216 'type':152 'unclear':168 'unit':141 'upfront':103 'usd':92 'usdc':14,32,91,128,143 'usdc-on-base' 'use':126 'util':80 'via':45 'wallet':199 'web3':77 'without':206 'x402':2,20,47,106 'x402 endpoint' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"e33b5665-0c0e-45d9-b5b2-2b142b8de8fd","listingId":"656a3d41-1c61-4491-a7b9-e8777ecaf2f1","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:57.375Z"}],"sources":[{"listingId":"656a3d41-1c61-4491-a7b9-e8777ecaf2f1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/74","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:57.375Z","lastSeenAt":"2026-04-22T09:01:04.203Z"}],"details":{"listingId":"656a3d41-1c61-4491-a7b9-e8777ecaf2f1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/74 \\\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":"Endpoint returns 402 with x402 challenge, confirming it is live on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/74"},{"claim":"USDC contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/claims/74"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-call for premium data or services without managing API keys","Agent-driven workflows that need on-chain-settled API access","Testing x402 payment protocol integrations on Base"],"bestFor":["Developers experimenting with x402 pay-per-call APIs","AI agents with USDC on Base that need keyless API access","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed documentation or guaranteed SLAs before purchasing","High-volume batch processing where $0.02/request adds up quickly","Anyone without a Base-compatible wallet or USDC balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.074Z"},"updatedAt":"2026-04-22T09:01:04.203Z"}}