{"id":"6677a09f-c039-4923-b2df-bdd6eaa6fc63","shortId":"Fh53aM","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/orders/8` is labeled \"Premium API Access\" and accepts POST requests, charging up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys, rate limits, or subscriptions are required — each request is paid individually via the x402 payment header.\n\nThe broader platform advertises multiple API categories including 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 listed at the same $0.02/request price point.\n\nHowever, the specific endpoint being listed here (`/api/v1/orders/8`) is described only as \"Premium API Access\" with no further documentation about what data or functionality it returns. The docs, pricing, and API pages on the site are essentially empty (showing only a \"Connect wallet\" prompt). Without additional documentation or example responses, the exact behavior of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access"],"warnings":["No documentation available — docs, pricing, and API pages show only 'Connect wallet' with no content","The specific endpoint /api/v1/orders/8 has no description of what it returns or what input it expects","No OpenAPI spec or response schema provided","The broader platform lists many endpoint categories but none have documented behavior"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/8","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request/response, and the docs/pricing/API pages are empty stubs. The purpose of this specific endpoint (/api/v1/orders/8) is entirely opaque beyond the label 'Premium API 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'/call':13,28 '/request':147 '0.02':12,27,76,146 '000':70 '20':69 'Base network API' 'USDC API' 'accept':46,63 'access':61,164 'addit':195 'advertis':101 'ai':113 'analysi':117 'analyt':107 'api':5,20,38,60,80,103,163,180 'base':8,23,51,71 'behavior':202 'broader':99 'call':78 'categori':104 'charg':66 'classif':120 'connect':191 'convers':137 'data':106,110,171 'describ':159 'doc':177 'document':168,196 'embed':121 'empti':187 'endpoint':55,140,153,205 'essenti':186 'estim':131 'exact':201 'exampl':198 'exchang':126 'export':111 'feed':125 'financ':122 'function':173 'gas':130 'generat':138 'geocod':135 'header':97 'howev':150 'i.e':75 'includ':105 'individu':92 'infrastructur':133 'insight':112 'json-response' 'key':81 'label':58 'learn':115 'limit':83 'list':142,155 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':114 'metric':108 'micropayment API' 'multipl':102 'network':9,24,52 'no-api-key' 'page':181 'paid':91 'pay':2,17,35 'pay per call API' 'pay-per-request':1,16,34 'payment':48,96 'per':3,18,36,77 'platform':6,21,39,100 'point':149 'post':64 'post-endpoint' 'premium':59,162 'premium API access' 'price':124,148,178 'prompt':193 'protocol':44 'quot':129 'rate':82,127 'remain':206 'report':109 'request':4,19,37,65,89 'requir':87 'respons':199 'return':175 'sentiment':116 'show':188 'site':184 'specif':54,152 'subscript':85 'summar':119 'text':118 'token':128 'unclear':207 'unit':72 'usdc':15,30,47,74 'usdc-base-network' 'use':41 'util':134 'valid':136 'via':10,25,93 'wallet':192 'web3':123 'without':194 'x402':11,26,43,95 'x402 API' 'x402-payment'","prices":[{"id":"e6116790-df9f-47ea-96a4-108f627a8a4d","listingId":"6677a09f-c039-4923-b2df-bdd6eaa6fc63","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:52.286Z"}],"sources":[{"listingId":"6677a09f-c039-4923-b2df-bdd6eaa6fc63","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:52.286Z","lastSeenAt":"2026-04-25T00:03:31.586Z"}],"details":{"listingId":"6677a09f-c039-4923-b2df-bdd6eaa6fc63","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/8 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/orders/8"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/8"}],"useCases":["Accessing a premium API endpoint with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Testing x402 protocol integrations with low-cost endpoints"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-as-you-go API access","Low-volume consumers who want no subscription commitments"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume use cases where per-request crypto payments add overhead","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:46.525Z"},"updatedAt":"2026-04-25T00:03:31.586Z"}}