{"id":"1aebd3dd-1300-4f64-8739-cb69d0c1a5d2","shortId":"wysjZS","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Each endpoint costs $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/162` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live, requiring up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. No API keys or rate limits are advertised — access is gated purely by payment. The response MIME type is `application/json`.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what `/api/v1/wire/162` specifically returns or what input parameters it expects. The endpoint's exact functionality beyond the generic \"Premium API Access\" label is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","crypto-payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-gated endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; input parameters and output format are unknown","The specific functionality of /api/v1/wire/162 is unclear — 'Premium API Access' is a generic label","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/162","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/162","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 with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/wire/162 is entirely unclear beyond the generic label 'Premium API Access'. The docs pages are 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'/request':13,28 '0.02':12,27,86,126 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '20':120 '6':131 'Base network API' 'USDC micropayment API' 'accept':107 'access':7,22,38,105,147,213 'address':137 'advertis':146 'ai/ml':59 'analysi':62 'analyt':58 'api':6,21,37,55,104,140,165,212 'application/json':158 'base':9,24,94,122 'beyond':208 'broad':48 'call':4,19,134 'catalog':49 'challeng':112 'classif':64 'confirm':113 'connect':174 'content':180 'convers':81 'cost':85 'crypto-gated endpoint' 'data':57 'decim':132 'descript':191 'doc':164 'document':159 'embed':65 'endpoint':32,84,98,204 'estim':75 'exact':206 'exampl':188 'exchang':70 'expect':202 'extrem':161 'feed':69 'financ':66 'function':207 'gas':74 'gate':149 'generat':82 'generic':210 'geocod':79 'host':46 'infer':60 'infrastructur':77 'input':199 'json-response' 'key':141 'label':214 'limit':144 'list':101 'live':116 'lowpaymentfee' 'lowpaymentfee.com':34 'mime':155 'network':95 'no-api-key' 'openapi':184 'page':169 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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/162","description":"Premium API 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endpoint returns a 402 x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/162"},{"claim":"All APIs on the site cost $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/162"},{"claim":"The site offers APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services without API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven workflows that need keyless, pay-as-you-go API access"],"bestFor":["Developers who want instant API access without signup or API keys","AI agents that can settle x402 payments autonomously on Base","Users comfortable paying per-request in USDC"],"notFor":["Users who need detailed API documentation or schemas before integrating","Anyone without USDC on the Base network","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.447Z"},"updatedAt":"2026-04-22T04:02:15.214Z"}}