{"id":"f85040f4-fa69-407e-98e2-b0201480888e","shortId":"Ytmpjc","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. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. Each call costs $0.02 in USDC on the Base network, with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/wire/188` is listed as \"Premium API Access\" and accepts POST requests. Payment is settled on-chain using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals) per request, with a 300-second payment timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what this particular wire endpoint actually returns. The site's landing page groups APIs into categories (analytics, AI, finance, infrastructure) but does not clarify which category `/api/v1/wire/188` belongs to or what data it provides.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-marketplace","crypto"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","USDC pay-per-call","Base network API","micropayment API","wire endpoint"],"warnings":["No documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","Purpose of /api/v1/wire/188 is unclear; 'Premium API Access' is a generic label","Cannot verify what data or service is actually returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/188","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/188","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does beyond the generic label 'Premium API Access'. This is effectively a stub 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'/request':16,34 '0.02':15,33,75,137 '000':133 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':116 '20':132 '300':147 '6':141 'Base network API' 'USDC pay-per-call' 'accept':104 'access':7,25,44,102 'actual':191 'ai':64,203 'analyt':63,202 'api':6,24,43,60,84,101,157,199 'base':9,27,80,118,134 'belong':213 'call':4,22,73 'categori':201,211 'chain':112 'challeng':121 'clarifi':209 'collect':54 'commit':91 'confirm':122 'connect':166 'contract':115 'cost':74 'data':62,217 'decim':142 'descript':184 'detail':173 'doc':156 'document':151 'endpoint':38,95,124,190 'exampl':181 'extrem':153 'financ':67,204 'given':138 'group':198 'host':52 'http-post' 'i.e':136 'infrastructur':70,205 'key':85 'land':196 'learn':66 'limit':88 'list':98 'live':126 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':65 'maximum':130 'micropayment API' 'network':10,28,81 'no-api-key' 'on-chain':110 'openapi':177 'page':161,197 'particular':188 'pay':2,20,57 'pay-per-cal':1,19 'pay-per-request':56 'payment':48,107,149 'per':3,21,58,143 'post':105 'premium':5,23,42,100 'price':158 'prompt':168 'protocol':13,31,49 'provid':41,219 'rate':87 'readm':160 'render':163 'request':59,106,144 'request/response':180 'requir':92,128 'return':192 'schema':178 'second':148 'settl':109 'site':51,194 'span':61 'spars':154 'specif':94 'technic':172 'timeout':150 'unit':135 'usdc':18,36,77,114,139 'usdc-base-network' 'use':113 'util':71 'via':11,29,45 'wallet':167 'web3':68 'wire':189 'wire endpoint' 'x402':12,30,47,120 'x402 API' 'x402-payment'","prices":[{"id":"43795828-c1a5-4047-8087-0d0ca587f360","listingId":"f85040f4-fa69-407e-98e2-b0201480888e","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/188","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:01.659Z"}],"sources":[{"listingId":"f85040f4-fa69-407e-98e2-b0201480888e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/188","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:01.659Z","lastSeenAt":"2026-04-22T13:32:00.292Z"}],"details":{"listingId":"f85040f4-fa69-407e-98e2-b0201480888e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/188 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\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/188"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/188"}],"useCases":["Programmatic access to premium data or services without subscription commitments","Agent-driven API consumption with per-call crypto payments","Testing x402 payment protocol integrations on Base network"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents with USDC wallets on Base needing on-demand endpoints","Projects exploring x402 micropayment workflows"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Applications requiring high-throughput with predictable flat-rate pricing","Developers without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.471Z"},"updatedAt":"2026-04-22T13:32:00.292Z"}}