{"id":"991a6a21-c9d4-40b2-baf0-96942c9fa80a","shortId":"Zbbg9w","kind":"x402","title":"Pay-per-call API suite on Base (USDC) covering analytics, AI, finance, and utilities at $0.02/request.","tagline":"Pay-per-call API suite on Base (USDC) covering analytics, AI, finance, and utilities at $0.02/request.","description":"lowpaymentfee.com offers a collection of x402-enabled API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utilities. Every endpoint is priced at $0.02 per request, settled in USDC on the Base network. There are no API keys, no rate limits, and no minimum commitments — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/wire/69` is listed as \"Premium API Access.\" Its x402 challenge confirms it accepts USDC (contract 0x8335…) on Base with a maxAmountRequired of 20000 base units, which equals $0.02 (USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json. However, the exact functionality behind this particular path (`/wire/69`) is not documented on the site — the landing page only lists analytics, AI, finance, and utility routes. No OpenAPI spec, detailed docs, or example request/response payloads were found; the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Without documentation or schema details for `/api/v1/wire/69` specifically, its exact purpose remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method"],"categories":["api","infrastructure"],"synonyms":["x402 API","micropayment API","USDC API","Base network API","pay-per-call","lowpaymentfee","wire API"],"warnings":["The exact functionality of /api/v1/wire/69 is not documented anywhere on the site","No OpenAPI spec or request/response schema available","Docs, pricing, and API pages render only a 'Connect wallet' prompt with no usable content","The /wire/69 path does not appear in the site's listed API catalog"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/69","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/69","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 schema, no example requests/responses, and the specific purpose of /api/v1/wire/69 is undocumented. The docs/pricing/API pages are empty beyond a wallet-connect 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'/request':18,36 '/wire/69':146 '0.02':17,35,62,125,221 '0x8335':113 '20000':120 '6':128 'Base network API' 'USDC API' 'accept':110,132 'access':104 'advertis':195 'ai':12,30,159 'ai/ml':50 'analysi':199 'analyt':11,29,49,158 'api':5,23,45,75,103,179 'application/json':137 'attach':86 'base':8,26,70,115,121 'behind':142 'broader':193 'call':4,22 'caller':84 'challeng':107 'classif':202 'collect':40 'commit':83 'confirm':108 'connect':185 'content':191 'contract':112 'convers':214 'cover':10,28 'data':48,53 'decim':129 'detail':167,228 'doc':168,176 'document':149,225 'embed':203 'enabl':44 'endpoint':46,58,96,131,196 'equal':124 'estim':211 'everi':57 'exact':140,233 'exampl':170 'exchang':206 'feed':205 'financ':13,31,160 'finance/web3':52 'found':174 'function':141 'gas':210 'general':55 'generat':216 'geocod':212 'header':90 'howev':138 'infer':51 'json-api' 'key':76 'land':154 'limit':79 'list':100,157 'lowpaymentfee' 'lowpaymentfee.com':37 'maxamountrequir':118 'micropayment API' 'minimum':82 'network':71 'offer':38 'openapi':165 'page':155,180 'particular':144 'path':145 'pay':2,20 'pay-per-cal':1,19 'pay-per-call' 'pay-per-request' 'payload':172 'payment':89 'per':3,21,63 'platform':194 'point':223 'post':133 'post-method' 'premium':102 'price':60,177,204,222 'prompt':187 'purpos':234 'quot':209 'rate':78,207 'remain':235 'render':182 'request':64,93,134 'request/response':171 'return':136 'rout':163 'schema':227 'sentiment':198 'settl':65 'simpli':85 'site':152 'span':47 'spec':166 'specif':95,231 'suit':6,24 'summar':201 'text':200 'token':208 'unclear':236 'unit':122 'usdc':9,27,67,111,126 'usdc-base' 'use':127 'util':15,33,56,162 'valid':213 'wallet':186 'wire API' 'without':224 'x402':43,88,106 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"4cda9bc1-bcf9-41e3-9041-a84a5f5b3565","listingId":"991a6a21-c9d4-40b2-baf0-96942c9fa80a","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:14.332Z"}],"sources":[{"listingId":"991a6a21-c9d4-40b2-baf0-96942c9fa80a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:14.332Z","lastSeenAt":"2026-04-22T04:02:16.611Z"}],"details":{"listingId":"991a6a21-c9d4-40b2-baf0-96942c9fa80a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/69 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired 20000 base units USDC on Base for /api/v1/wire/69","source_url":"https://lowpaymentfee.com/api/v1/wire/69"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/69"},{"claim":"Site lists analytics, AI, finance, and utility API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a pay-per-call API without needing API keys or subscriptions","Agent-driven workflows that settle per-request costs in USDC on Base","Low-friction API consumption where each call costs $0.02"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native micropayments over traditional billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.914Z"},"updatedAt":"2026-04-22T04:02:16.611Z"}}