{"id":"397f0529-f3f4-4547-99e8-2c66d78e86ae","shortId":"Jx94Fk","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per 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-call 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 is priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/184` 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 — no API keys, no rate limits, and no upfront commitments are required. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.\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 documentation, and no examples of what this particular wire/184 endpoint actually returns. The site's landing page lists many API categories but does not clarify what wire/184 specifically does versus the named endpoints. Without documentation or example responses, the actual functionality behind this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","json-response","http-post"],"categories":["api-marketplace","crypto"],"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' with no content","No OpenAPI or schema describing request parameters or response format for /api/v1/wire/184","The purpose of the 'wire/184' endpoint is unclear — it may be a generic or placeholder route","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/184","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/184","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 no documentation, no OpenAPI spec, no request/response examples, and no explanation of what wire/184 specifically returns. The docs pages are empty. This is effectively a stub 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'0.02':12,28,90,121,123 '000':116 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':157 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':161 '20':115 'accept':125 'access':7,23,40,109 'actual':204,233 'address':156 'ai/ml':61 'amount':113 'analysi':64 'analyt':60 'api':6,22,39,57,108,140,170,213 'application/json':130 'base':9,25,98,117,163 'base network api' 'base-network' 'behind':235 'broad':50 'call':4,20,56 'catalog':51 'categori':214 'clarifi':218 'classif':66 'commit':148 'connect':179 'content':185 'contract':160 'convers':83 'data':59 'doc':169 'document':164,194,228 'embed':67 'endpoint':34,86,102,203,226,237 'estim':77 'exact':137 'exampl':197,230 'exchang':72 'extrem':166 'feed':71 'financ':68 'function':234 'gas':76 'generat':84 'geocod':81 'handl':133 'host':48 'http-post' 'infer':62 'infrastructur':79 'json-response' 'key':141 'land':209 'limit':144 'list':105,211 'lowpaymentfee' 'lowpaymentfee.com':36 'mani':212 'max':112 'micropayment api' 'name':225 'network':99 'no-api-key' 'openapi':189 'page':174,210 'particular':201 'pay':2,18,54 'pay per call api' 'pay-per-cal':1,17,53 'pay-per-call' 'payment':44,131,152 'per':3,13,19,29,55,91 'post':126 'premium':5,21,38,107 'premium api access' 'price':70,88,171 'prompt':181 'protocol':45 'provid':37 'quot':75 'rate':73,143 'readm':173 'remain':238 'render':176 'request':14,30,92,127 'request/response':192 'requir':150 'respons':231 'return':129,205 'schema':193 'scheme':138 'sent':154 'sentiment':63 'settl':93 'site':47,207 'span':58 'spars':167 'spec':190 'specif':101,221 'summar':65 'token':74 'unclear':239 'unit':118 'upfront':147 'usdc':16,32,95,120,122,159 'usdc api' 'usdc-settlement' 'use':158 'util':80 'valid':82 'versus':223 'via':10,26,41,134 'wallet':180 'web3':69 'wire/184':202,220 'without':227 'x402':11,27,43,136 'x402 api' 'x402-payment'","prices":[{"id":"9641acd0-c40f-40a0-9237-854ba27e5a0b","listingId":"397f0529-f3f4-4547-99e8-2c66d78e86ae","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/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:57.420Z"}],"sources":[{"listingId":"397f0529-f3f4-4547-99e8-2c66d78e86ae","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/184","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:57.420Z","lastSeenAt":"2026-04-22T13:32:00.131Z"}],"details":{"listingId":"397f0529-f3f4-4547-99e8-2c66d78e86ae","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/184 \\\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 advertising USDC on Base, maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/wire/184"},{"claim":"Site lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to paid API endpoints without API key management","Agent-driven pay-per-call workflows settled in USDC on Base","Accessing data, AI, finance, or utility APIs with per-request micropayments"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before purchasing","Anyone without USDC on the Base network","High-volume consumers who need bulk pricing or rate-limit guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.648Z"},"updatedAt":"2026-04-22T13:32:00.131Z"}}