{"id":"4024e065-ffeb-424c-98ca-7cb6a60443e3","shortId":"5pEkQk","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The x402 protocol handles payment inline: callers attach a payment header to each HTTP request, and the server fulfills the call once payment is verified.\n\nThe specific endpoint at `/api/v1/wire/1` is listed as \"Premium API Access.\" Its x402 challenge confirms it is live, accepting POST requests, and requires up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The platform also advertises sibling endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point.\n\nDocumentation is extremely thin: the /docs, /pricing, /api, 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 usage examples available from the crawl. The actual functionality behind `/api/v1/wire/1` (\"Premium API Access\") is unclear — the name is generic and no input/output schema is documented beyond the x402 challenge's indication that it accepts POST with `application/json` responses.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post","json-response"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee","crypto-paid API"],"warnings":["Documentation pages (/docs, /pricing, /api, /README) all render only 'Connect wallet' with no usable content.","The specific functionality of /api/v1/wire/1 ('Premium API Access') is undocumented — it is unclear what data or service it provides.","No OpenAPI spec, request schema, or response schema is available.","No usage examples or sample responses could be found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/1","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/1","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and network details, but documentation is essentially absent — every doc page returns only 'Connect wallet.' The purpose of /api/v1/wire/1 is unclear, there is no input/output schema, and no examples exist. This is effectively a stub 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'/api/v1/wire/1':108,219 '/docs':181 '/pricing':182 '/readme':185 '/request':13,28 '0.02':12,27,58,141,173 '000':130 '0x8335':135 '20':129 '2913':136 'Base network API' 'USDC API' 'accept':122,243 'access':114,222 'across':46 'actual':216 'advertis':145 'ai/ml':49 'also':144 'analysi':150 'analyt':48 'api':5,20,37,70,113,221 'application/json':246 'attach':86 'avail':211 'base':8,23,66,131,138 'behind':218 'beyond':235 'broad':42 'call':4,19,99 'caller':85 'challeng':117,238 'classif':153 'commit':77 'confirm':118 'connect':191 'content':197 'convers':165 'cost':57 'crawl':214 'crypto-paid API' 'data':47,167 'document':176,206,234 'embed':154 'enabl':36 'endpoint':45,56,106,147 'equal':140 'estim':162 'everi':55 'exampl':210 'exchang':157 'extrem':178 'feed':156 'finance/web3':51 'fulfil':97 'function':217 'gas':161 'generat':168 'generic':228 'geocod':163 'handl':82 'header':89 'http':92 'http-post' 'indic':240 'infer':50 'inlin':84 'input/output':231 'json-response' 'key':71 'limit':74 'list':110 'live':121 'lowpaymentfee' 'lowpaymentfee.com':31 'micropayment API' 'name':226 'network':9,24,67 'no-api-key' 'offer':40 'openapi':201 'page':186 'paid':61 'pay':2,17 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request' 'payment':83,88,101 'per':3,18,59 'platform':6,21,38,143 'point':175 'post':123,244 'premium':112,220 'price':155,174 'prompt':193 'protocol':81 'quot':160 'rate':73,158 'render':188 'request':60,93,124 'request/response':204 'requir':78,126 'respons':247 'schema':205,232 'sentiment':149 'server':96 'servic':54 'set':43 'sibl':146 'spec':202 'specif':105 'summar':152 'text':151 'thin':179 'token':159 'unclear':224 'unit':132 'usag':209 'usdc':15,30,63,134 'usdc-base-network' 'util':53 'valid':164 'verifi':103 'via':10,25 'wallet':192 'x402':11,26,35,80,116,237 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"352b3f56-532a-4c21-a799-d8a09bb8c577","listingId":"4024e065-ffeb-424c-98ca-7cb6a60443e3","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/1","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:40.478Z"}],"sources":[{"listingId":"4024e065-ffeb-424c-98ca-7cb6a60443e3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/1","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:40.478Z","lastSeenAt":"2026-04-22T20:01:46.459Z"}],"details":{"listingId":"4024e065-ffeb-424c-98ca-7cb6a60443e3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/1 \\\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":"All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge for /api/v1/wire/1 requires maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/wire/1"},{"claim":"The platform lists endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents that need to call utility or data APIs without pre-registering for API keys","Programmatic access to analytics, AI inference, or finance data with per-call USDC payments","Testing x402 protocol integrations against a live, low-cost endpoint"],"bestFor":["Developers or agents wanting zero-signup, pay-as-you-go API access","x402 protocol experimentation on Base with low per-call costs","Scenarios where avoiding API key management is valuable"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where $0.02/request adds up and bulk pricing is preferred","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.579Z"},"updatedAt":"2026-04-22T20:01:46.459Z"}}