{"id":"c5e65fc2-0446-4222-8ba1-61d24eae69cf","shortId":"ZbBwex","kind":"x402","title":"Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text 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, paid in USDC on the Base network.\n\nThe specific endpoint `/api/v1/orders/14` is listed as \"Premium API Access\" and its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are required. The endpoint accepts POST requests and returns application/json.\n\nDocumentation beyond the landing page is extremely sparse; the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/orders/14` endpoint actually returns. The purpose of this specific \"orders\" endpoint is unclear from available material — it does not map to any of the named API categories on the homepage. Agents should treat this endpoint with caution until more documentation is available.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-apis"],"categories":["api-platform","llm","finance","geo"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","base usdc api","402 payment api","lowpaymentfee"],"warnings":["No OpenAPI spec or schema documentation available","The /docs, /pricing, /api, and /README pages contain no useful content — only a 'Connect wallet' prompt","The purpose of /api/v1/orders/14 ('Premium API Access') is unclear and does not correspond to any named endpoint on the homepage","No request body schema or response examples are documented anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/14","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/orders/14","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response examples, and the specific purpose of /api/v1/orders/14 is unexplained. The docs, pricing, and README pages are all blank beyond a wallet-connect 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'/api/v1/orders/14':112,206 '/call':19,38 '/docs':174 '/pricing':175 '/readme':178 '0.02':18,37,99,139 '000':128 '0x8335':133 '20':127 '2913':134 '402 payment api' 'accept':159 'access':118 'across':58 'actual':208 'advertis':123 'agent':236 'ai':12,31,68 'ai-inference' 'analysi':72 'analyt':62 'api':5,24,45,117,149,231 'application/json':164 'avail':220,247 'base':8,27,107,129,136 'base usdc api' 'beyond':166 'broad':50 'catalog':51 'categori':60,232 'caution':242 'challeng':122 'classif':75 'classification' 'connect':184 'content':190 'convers':92 'data':11,30,61,65 'data-analytics' 'document':165,199,245 'embed':76 'embeddings' 'enabl':44 'endpoint':16,35,57,95,111,158,207,216,240 'equal':138 'estim':86 'exact':146 'exampl':202 'exchang':81 'export':66 'extrem':171 'feed':80 'financ':13,32,77 'finance-data' 'four':59 'gas':85 'generat':93 'geocod':90 'geocoding' 'homepag':235 'infrastructur':88 'insight':67 'key':150 'land':168 'learn':70 'limit':154 'list':114 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':69 'made':142 'map':225 'materi':221 'maxamountrequir':125 'metric':63 'micropayment api' 'name':230 'network':108 'offer':48 'openapi':194 'order':215 'page':169,179 'paid':102 'pay':2,21,54 'pay per call api' 'pay-per-request':1,20,53 'payment':140 'per':3,22,55,100 'platform':6,25,46 'post':160 'premium':116 'price':79,97 'prompt':186 'purpos':211 'quot':84 'rate':82,153 'render':181 'report':64 'request':4,23,56,101,161 'request/response':197 'requir':156 'return':163,209 'schema':198 'scheme':147 'sentiment':71 'sentiment-analysis' 'spars':172 'spec':195 'specif':110,214 'subscript':151 'substant':189 'summar':74 'text':73 'text-summarization' 'token':83 'treat':238 'unclear':218 'unit':130 'usdc':104,132 'usdc-base' 'util':15,34,89 'utility-apis' 'valid':91 'via':9,28,143 'wallet':185 'web3':78 'x402':10,29,43,121,145 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"660c6b5c-0300-48e8-badd-d83398bca551","listingId":"c5e65fc2-0446-4222-8ba1-61d24eae69cf","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/orders/14","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:35.499Z"}],"sources":[{"listingId":"c5e65fc2-0446-4222-8ba1-61d24eae69cf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/14","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:35.499Z","lastSeenAt":"2026-04-23T16:06:41.027Z"}],"details":{"listingId":"c5e65fc2-0446-4222-8ba1-61d24eae69cf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/14 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/14"},{"claim":"Endpoint categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key signup","Fetching real-time finance data like token quotes, gas estimates, and exchange rates on a per-call basis","Running utility operations like geocoding or data validation with instant crypto micropayments"],"bestFor":["Agents or developers wanting zero-signup, pay-as-you-go API access","x402-compatible clients that can settle USDC on Base","Low-volume or sporadic API consumers who don't want subscriptions"],"notFor":["High-volume production workloads needing SLAs, rate-limit guarantees, or detailed documentation","Users without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.498Z"},"updatedAt":"2026-04-23T16:06:41.027Z"}}