{"id":"3129265d-e781-49ec-ba86-18015ba90900","shortId":"uZs7e9","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). All endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/122` 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 subscriptions are required. You simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The docs, pricing, API, 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/122 endpoint actually returns. The site's landing page confirms the pricing model and lists available endpoints, but does not explain what data or functionality `/api/v1/wire/122` specifically provides. Treat this as an exploratory endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","http-post"],"categories":["api-marketplace","crypto-payments"],"synonyms":["lowpaymentfee","x402 api","pay per call api","usdc api access","base network api","micropayment api","premium api"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format for /api/v1/wire/122","The specific functionality of the /api/v1/wire/122 endpoint is unknown — 'Premium API Access' is not descriptive","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/122","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/122","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what /api/v1/wire/122 actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':13,28 '0.02':12,27,88,119,121 '000':114 '20':113 'accept':123 'access':7,22,38,107 'actual':201 'ai/ml':59 'amount':111 'analysi':62 'analyt':58 'api':6,21,37,55,106,138,169 'application/json':128 'attach':150 'avail':214 'base':9,24,96,115 'base network api' 'broad':48 'call':4,19 'catalog':49 'classif':64 'confirm':208 'connect':177 'content':183 'convers':81 'data':57,221 'descript':194 'doc':167 'document':162,235 'embed':65 'endpoint':32,84,100,200,215,232 'estim':75 'exact':135 'exampl':191 'exchang':70 'explain':219 'exploratori':231 'extrem':164 'feed':69 'financ':66 'function':223 'gas':74 'generat':82 'geocod':79 'handl':131 'header':155 'host':46 'http-post' 'infer':60 'infrastructur':77 'json-response' 'key':139 'land':206 'limit':142 'list':103,213 'lowpaymentfee' 'lowpaymentfee.com':34 'max':110 'micropayment api' 'model':211 'network':97 'no-api-key' 'openapi':187 'page':172,207 'particular':198 'pay':2,17,52 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':51 'payment':42,129,154,160 'per':3,18,53,89 'post':124 'premium':5,20,36,105 'premium api' 'price':68,86,168,210 'prompt':179 'proof':161 'protocol':43 'provid':35,226 'quot':73 'rate':71,141 'readm':171 'render':174 'request':54,90,125 'request/response':190 'requir':147 'return':127,202 'schema':188 'scheme':136 'sentiment':61 'settl':91 'simpli':149 'site':45,204 'span':56 'spars':165 'specif':99,225 'subscript':145 'summar':63 'surfac':236 'token':72 'treat':227 'unit':116 'usdc':15,30,93,118,120 'usdc api access' 'usdc-base' 'util':78 'valid':80,158 'via':10,25,39,132 'wallet':178 'web3':67 'wire/122':199 'x':153 'x-payment':152 'x402':11,26,41,134,159 'x402 api' 'x402-payment'","prices":[{"id":"e53ec337-1b75-4ecc-b327-112d0d67f369","listingId":"3129265d-e781-49ec-ba86-18015ba90900","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/122","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:39.867Z"}],"sources":[{"listingId":"3129265d-e781-49ec-ba86-18015ba90900","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/122","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:39.867Z","lastSeenAt":"2026-04-22T04:02:15.131Z"}],"details":{"listingId":"3129265d-e781-49ec-ba86-18015ba90900","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/122 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","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, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/122"},{"claim":"The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to paid API endpoints without managing API keys or subscriptions","Agent-driven workflows that need on-demand API calls settled in USDC on Base","Exploring a low-cost pay-per-request API marketplace for data, AI, finance, and utility services"],"bestFor":["Developers or agents wanting zero-signup, pay-per-call API access","x402-compatible clients on the Base network","Low-volume or bursty workloads where per-request pricing is preferable to subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads requiring bulk pricing or dedicated support","Users without USDC on Base or an x402-compatible payment client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.58Z"},"updatedAt":"2026-04-22T04:02:15.131Z"}}