{"id":"ba11056f-4cdc-4cf3-95f5-2f267f17438a","shortId":"zrzFL5","kind":"x402","title":"Pay-per-request API platform on Base via x402 — analytics, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API platform on Base via x402 — analytics, 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 settled in USDC on the Base network. The specific endpoint at `/api/v1/orders/46` is labeled \"Premium API Access\" and accepts POST requests with payment via the x402 protocol. The 402 challenge indicates a max amount of 20,000 base units of USDC (0.02 USD per request) on Base.\n\nThe broader platform advertises four categories of APIs: 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 $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the docs, API, pricing, 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 detailed documentation for any endpoint. The specific functionality of the `/api/v1/orders/46` endpoint is unclear beyond its \"Premium API Access\" label, and it is not listed among the catalog endpoints on the homepage.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","no-api-key"],"categories":["api-platform","ai","finance","data"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","base usdc api","crypto api gateway","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema provided for any endpoint","The specific endpoint /api/v1/orders/46 ('Premium API Access') is not listed in the site's public API catalog — its purpose is unknown","No request or response examples available anywhere in the crawled material","The breadth of advertised capabilities (AI, finance, analytics, utilities) cannot be verified due to lack of documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/46","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC payments on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The specific purpose of /api/v1/orders/46 is unclear and not listed in the site catalog. This is effectively a stub 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'/call':19,38 '0.02':18,37,99,151 '000':94 '20':93 '402':86 'accept':76 'access':74,216 'advertis':108 'ai':12,31,120 'ai-inference' 'among':223 'amount':91 'analysi':124 'analyt':11,30,114 'api':5,24,45,73,112,156,172,215 'base':8,27,63,95,104 'base usdc api' 'base-network' 'beyond':212 'broad':50 'broader':106 'catalog':51,225 'categori':110 'challeng':87 'classif':127 'classification' 'commit':164 'connect':181 'content':187 'convers':144 'crypto api gateway' 'data':113,117 'data-analytics' 'detail':198 'doc':171 'document':166,199 'embed':128 'embeddings' 'enabl':44 'endpoint':16,35,57,67,147,202,209,226 'estim':138 'exampl':195 'exchang':133 'export':118 'extrem':168 'feed':132 'financ':13,32,129 'finance-data' 'four':109 'function':205 'gas':137 'generat':145 'geocod':142 'geocoding' 'homepag':229 'indic':88 'infrastructur':140 'insight':119 'key':157 'label':71,217 'learn':122 'limit':160 'list':149,222 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':121 'max':90 'metric':115 'micropayment api' 'minimum':163 'network':64 'no-api-key' 'offer':48 'openapi':191 'page':176 'pay':2,21,54 'pay per call api' 'pay-per-request':1,20,53 'payment':80 'per':3,22,55,101,152 'platform':6,25,46,107 'post':77 'premium':72,214 'price':131,173 'prompt':183 'protocol':84 'quot':136 'rate':134,159 'readm':175 'render':178 'report':116 'request':4,23,56,78,102,153 'request/response':194 'requir':165 'schema':192 'sentiment':123 'sentiment-analysis' 'settl':58 'spars':169 'specif':66,204 'summar':126 'text':125 'text-summarization' 'token':135 'unclear':211 'unit':96 'usd':100 'usdc':60,98 'usdc-settlement' 'util':15,34,141 'valid':143 'via':9,28,81 'wallet':182 'web3':130 'x402':10,29,43,83 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"449a2196-4334-4a03-a71e-680bfd105be1","listingId":"ba11056f-4cdc-4cf3-95f5-2f267f17438a","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:33.090Z"}],"sources":[{"listingId":"ba11056f-4cdc-4cf3-95f5-2f267f17438a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:33.090Z","lastSeenAt":"2026-04-22T21:30:30.015Z"}],"details":{"listingId":"ba11056f-4cdc-4cf3-95f5-2f267f17438a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/46 \\\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":"The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/orders/46"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/orders/46"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data such as token quotes, gas estimates, and exchange rates","Running analytics queries and data exports on a per-request payment basis","Using utility services like geocoding, validation, and data conversion"],"bestFor":["Agents or developers who want zero-signup, pay-per-call API access","Use cases requiring low-cost micropayments ($0.02/request) settled on-chain","Projects already operating on the Base network with USDC"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integration","High-volume use cases where per-request pricing may add up compared to subscription models","Users without a Base-compatible wallet or USDC holdings"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.462Z"},"updatedAt":"2026-04-22T21:30:30.015Z"}}