{"id":"3f72cd7d-74ab-4f96-ad88-a807b19eb4aa","shortId":"2bB5yJ","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 are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/wire/28` is labeled \"Premium API Access\" but its exact functionality is not documented beyond the generic description. The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (0.02 USD given 6 decimals) per call. Payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract on Base (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\n\nThe platform advertises instant access with no signup, leveraging the x402 HTTP payment standard. Documentation pages exist but appear gated behind a wallet connection, so detailed request/response schemas are not publicly available.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-gateway","infrastructure"],"synonyms":["low payment fee API","x402 API","pay-per-call API","USDC micropayment API","Base network API","premium access endpoint"],"warnings":["Exact functionality of /api/v1/wire/28 is undocumented — 'Premium API Access' is a generic label","Documentation pages are gated behind wallet connection and provide no public content","No OpenAPI spec or response schema available","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/28","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/wire/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via 402 challenge and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no request/response schema, and no examples. The 'Premium API Access' label is generic and 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'/request':16,34 '0.02':15,33,79,141 '000':136 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':156 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':163 '20':135 '6':144 'Base network API' 'USDC micropayment API' 'accept':127 'access':7,25,44,108,168 'address':155 'advertis':166 'ai':66 'analyt':65 'api':6,24,43,91,107 'appear':182 'avail':195 'base':9,27,87,137,162 'behind':184 'beyond':116 'call':4,22,147 'categori':62 'chain':153 'challeng':122 'charg':131 'commit':98 'confirm':123 'connect':187 'contract':160 'data':64 'decim':145 'descript':119 'detail':189 'document':115,178 'endpoint':38,55,75,102 'exact':111 'exist':180 'financ':69 'function':112 'gate':183 'generic':118 'given':143 'http':175 'http-post' 'includ':63 'infrastructur':72 'instant':167 'key':92 'label':105 'learn':68 'leverag':172 'limit':95 'live':126 'low payment fee API' 'lowpaymentfee.com':40 'machin':67 'mani':54 'maximum':133 'network':10,28,88 'no-api-key' 'offer':56 'on-chain':151 'one':52 'page':179 'paid':82 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payment':48,148,176 'per':3,21,80,146 'platform':59,165 'post':128 'premium':5,23,42,106 'premium access endpoint' 'price':77 'protocol':13,31,49 'provid':41 'public':194 'rate':94 'request':81,129 'request/response':190 'requir':99 'schema':191 'settl':150 'signup':171 'span':61 'specif':101 'standard':177 'unit':138 'usd':142 'usdc':18,36,84,140,159 'usdc-base-network' 'use':157 'util':73 'via':11,29,45 'wallet':186 'web3':70 'x402':12,30,47,121,174 'x402 API' 'x402-payment'","prices":[{"id":"33ea1fe4-3988-466d-866e-a2f6be0ad594","listingId":"3f72cd7d-74ab-4f96-ad88-a807b19eb4aa","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/wire/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:00.438Z"}],"sources":[{"listingId":"3f72cd7d-74ab-4f96-ad88-a807b19eb4aa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/28","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:00.438Z","lastSeenAt":"2026-04-22T10:32:31.098Z"}],"details":{"listingId":"3f72cd7d-74ab-4f96-ad88-a807b19eb4aa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/28 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","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 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/28"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/28"}],"useCases":["Accessing premium API services without signup or API key management","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-use endpoints into autonomous agent workflows"],"bestFor":["Developers wanting frictionless pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed documentation or OpenAPI specs before integrating","High-volume use cases where per-request pricing may add up","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.534Z"},"updatedAt":"2026-04-22T10:32:31.098Z"}}