{"id":"68f4f708-ebf4-474f-9c23-a4d80ba32442","shortId":"hwM77t","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/141` is listed as \"Premium API Access\" with a max amount of 20,000 base units of USDC (0.02 USDC = $0.02). It accepts POST requests and returns application/json. Payment is handled via the x402 exact scheme — callers attach an X-PAYMENT header with a signed payment to the payTo address. No API keys, rate limits, or upfront commitments are required; access is instant once payment is included.\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 spec, no request/response schema, and no description of what this particular wire/141 endpoint actually returns. The site's landing page confirms the pricing model and lists sibling endpoints, but the specific functionality behind `/api/v1/wire/141` is not documented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method","no-api-key"],"categories":["api-gateway","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","The specific functionality of /api/v1/wire/141 ('Premium API Access') is completely undocumented; it is unclear what data or service it provides.","No OpenAPI spec or request/response schema is available.","No examples of request bodies or response payloads exist in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/141","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/141","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/v1/wire/141 actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':13,28 '0.02':12,27,89,120,122 '000':115 '20':114 'Base network API' 'USDC micropayment API' 'accept':124 'access':7,22,38,108,163 'actual':209 'address':152 'ai':59 'amount':112 'analysi':63 'analyt':58 'api':6,21,37,55,107,154,176 'application/json':129 'attach':139 'base':9,24,97,116 'behind':228 'broad':48 'call':4,19 'caller':138 'catalog':49 'classif':65 'commit':160 'confirm':216 'connect':185 'content':191 'convers':82 'data':57 'descript':202 'doc':175 'document':170,232 'embed':66 'endpoint':32,85,101,208,223 'estim':76 'exact':136 'exchang':71 'extrem':172 'feed':70 'financ':67 'function':227 'gas':75 'generat':83 'geocod':80 'handl':132 'header':144 'host':46 'includ':169 'infrastructur':78 'instant':165 'json-response' 'key':155 'land':214 'learn':61 'limit':157 'list':104,221 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':60 'max':111 'model':219 'network':98 'no-api-key' 'openapi':195 'page':180,215 'particular':206 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':51 'payment':42,130,143,148,167 'payto':151 'per':3,18,53,90 'post':125 'post-method' 'premium':5,20,36,106 'premium API' 'price':69,87,177,218 'prompt':187 'protocol':43 'provid':35 'quot':74 'rate':72,156 'readm':179 'render':182 'request':54,91,126 'request/response':198 'requir':162 'return':128,210 'schema':199 'scheme':137 'sentiment':62 'settl':92 'sibl':222 'sign':147 'site':45,212 'span':56 'spars':173 'spec':196 'specif':100,226 'summar':64 'token':73 'unit':117 'upfront':159 'usdc':15,30,94,119,121 'usdc-base' 'util':79 'valid':81 'via':10,25,39,133 'wallet':186 'web3':68 'wire/141':207 'x':142 'x-payment':141 'x402':11,26,41,135 'x402 API' 'x402-payment'","prices":[{"id":"a0c748d1-9501-49f6-b9e2-3fb2703766bd","listingId":"68f4f708-ebf4-474f-9c23-a4d80ba32442","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/141","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:41.085Z"}],"sources":[{"listingId":"68f4f708-ebf4-474f-9c23-a4d80ba32442","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/141","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:41.085Z","lastSeenAt":"2026-04-22T10:32:30.207Z"}],"details":{"listingId":"68f4f708-ebf4-474f-9c23-a4d80ba32442","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/141 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment settled in USDC on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units (0.02 USDC) for /api/v1/wire/141","source_url":"https://lowpaymentfee.com/api/v1/wire/141"},{"claim":"Asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/141"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to utility endpoints"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on Base who want frictionless API calls"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without USDC on Base or an x402-compatible payment client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.464Z"},"updatedAt":"2026-04-22T10:32:30.207Z"}}