{"id":"3a236765-1595-4e6f-9436-2aea3ad53e2a","shortId":"Qv7r66","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 & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/119` is listed as \"Premium API Access\" with a maximum payment of 20,000 base units of USDC (0.02 USDC = $0.02). It accepts POST requests and returns application/json. Payment is made via the x402 exact scheme — no API keys, no rate limits, and no subscriptions required. The x402 challenge was confirmed live, returning a proper 402 response with payment parameters.\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 this particular wire/119 endpoint actually returns. The site's landing page lists many endpoints but does not clarify what `/api/v1/wire/119` specifically does versus the named endpoints. Prospective users should be aware that without documentation, the actual functionality behind this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post","no-api-key"],"categories":["api-marketplace","crypto-payments"],"synonyms":["lowpaymentfee","x402 api","pay per call api","usdc api","base network api","micropayment api","premium api access"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","The specific functionality of /api/v1/wire/119 ('Premium API Access') is not described anywhere","No OpenAPI schema or request/response examples provided","No information on what input the POST endpoint expects or what it returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/119","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/119","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, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of /api/v1/wire/119 is completely undocumented. The docs pages are empty beyond a wallet-connect 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'/request':13,28 '0.02':12,27,89,120,122 '000':115 '20':114 '402':157 'accept':124 'access':7,22,38,108 'actual':201,232 'ai':59 'analysi':63 'analyt':58 'api':6,21,37,55,107,139,168 'application/json':129 'awar':227 'base':9,24,97,116 'base network api' 'behind':234 'broad':48 'call':4,19 'catalog':49 'challeng':150 'clarifi':214 'classif':65 'confirm':152 'connect':177 'content':183 'convers':82 'data':57 'descript':194 'doc':167 'document':162,230 'embed':66 'endpoint':32,85,101,200,210,222,236 'estim':76 'exact':136 'exampl':191 'exchang':71 'extrem':164 'feed':70 'financ':67 'function':233 'gas':75 'generat':83 'geocod':80 'host':46 'http-post' 'infrastructur':78 'json-response' 'key':140 'land':206 'learn':61 'limit':143 'list':104,208 'live':153 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':60 'made':132 'mani':209 'maximum':111 'micropayment api' 'name':221 'network':98 'no-api-key' 'openapi':187 'page':172,207 'paramet':161 'particular':198 'pay':2,17,52 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':51 'payment':42,112,130,160 'per':3,18,53,90 'post':125 'premium':5,20,36,106 'premium api access' 'price':69,87,169 'prompt':179 'proper':156 'prospect':223 'protocol':43 'provid':35 'quot':74 'rate':72,142 'readm':171 'render':174 'request':54,91,126 'request/response':190 'requir':147 'respons':158 'return':128,154,202 'schema':188 'scheme':137 'sentiment':62 'settl':92 'site':45,204 'span':56 'spars':165 'specif':100,217 'subscript':146 'summar':64 'token':73 'unit':117 'unknown':238 'usdc':15,30,94,119,121 'usdc api' 'usdc-base' 'user':224 'util':79 'valid':81 'versus':219 'via':10,25,39,133 'wallet':178 'web3':68 'wire/119':199 'without':229 'x402':11,26,41,135,149 'x402 api' 'x402-payment'","prices":[{"id":"05b0730f-c408-4bb1-96dd-3613742196d2","listingId":"3a236765-1595-4e6f-9436-2aea3ad53e2a","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/119","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:33.139Z"}],"sources":[{"listingId":"3a236765-1595-4e6f-9436-2aea3ad53e2a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/119","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:33.139Z","lastSeenAt":"2026-04-22T04:02:14.849Z"}],"details":{"listingId":"3a236765-1595-4e6f-9436-2aea3ad53e2a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/119 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0.02 USD) on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/119"},{"claim":"Site lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-request for API access without subscriptions or API keys","Programmatic agent-driven API consumption settled in USDC on Base","Accessing data, AI, finance, or utility endpoints with crypto micropayments"],"bestFor":["Developers wanting zero-commitment pay-per-use API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native billing over traditional API key models"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Applications requiring guaranteed SLAs or support contracts","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.837Z"},"updatedAt":"2026-04-22T04:02:14.849Z"}}