{"id":"9245550f-5b86-4eb2-b0f7-3ee0ae954784","shortId":"vCCsUA","kind":"x402","title":"Pay-per-request API platform on Base via x402 — $0.02/call for data, AI, finance, and utility endpoints.","tagline":"Pay-per-request API platform on Base via x402 — $0.02/call for data, AI, finance, and utility endpoints.","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, settled in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/orders/93` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) on Base. Payment is made via the x402 protocol with an exact payment scheme — no API keys, subscriptions, or rate limits are required. The platform advertises instant access with no minimums or commitments.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The actual functionality behind the `/api/v1/orders/93` path is unclear — it does not match any of the advertised endpoint paths on the landing page, so its purpose is uncertain.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","no-api-key"],"categories":["llm","finance","geo","infrastructure"],"synonyms":["pay per call API","x402 API","micropayment API","USDC API","Base network API","low fee API","crypto payment API"],"warnings":["The endpoint path /api/v1/orders/93 does not match any of the advertised API paths on the landing page — its actual functionality is unknown.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no substantive content.","No OpenAPI schema or request/response examples are available for any endpoint.","The broad catalog of 16+ endpoints is advertised but none have documented input/output contracts."],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/93","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/93","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 on Base at $0.02 per call. However, documentation is essentially nonexistent — all doc/pricing/API pages show only 'Connect wallet'. The specific endpoint path (/api/v1/orders/93) doesn't match any advertised API, making its actual functionality unclear. No OpenAPI schema, no request/response examples, and no detailed descriptions are 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'/call':12,31 '0.02':11,30,98,134 '000':128 '20':127 '402':122 'Base network API' 'USDC API' 'access':118,162 'across':58 'actual':206 'advertis':160,221 'ai':15,34,68 'ai-inference' 'analysi':72 'analyt':62 'api':5,24,45,117,150,174 'base':8,27,106,129,136 'base-network' 'behind':208 'broad':50 'catalog':51 'categori':60 'challeng':123 'classif':75 'classification' 'commit':167 'connect':183 'content':189 'convers':91 'crypto payment API' 'data':14,33,61,65 'data-analytics' 'detail':200 'doc':173 'document':168,201 'embed':76 'embeddings' 'enabl':44 'endpoint':19,38,57,94,110,204,222 'estim':86 'exact':146 'exampl':197 'exchang':81 'export':66 'extrem':170 'feed':80 'financ':16,35,77 'finance-data' 'four':59 'function':207 'gas':85 'generat':92 'geocod':89 'geocoding' 'i.e':133 'infrastructure/utilities':88 'insight':67 'instant':161 'key':151 'land':226 'learn':70 'limit':155 'list':114 'low fee API' 'lowpaymentfee.com':39 'machin':69 'made':139 'match':217 'metric':63 'micropayment API' 'minimum':165 'network':107 'no-api-key' 'offer':48 'openapi':193 'page':178,227 'path':211,223 'pay':2,21,54 'pay per call API' 'pay-per-request':1,20,53 'payment':137,147 'per':3,22,55,99 'platform':6,25,46,159 'premium':116 'price':79,96,175 'prompt':185 'protocol':143 'purpos':230 'quot':84 'rate':82,154 'readm':177 'render':180 'report':64 'request':4,23,56,100,124 'request/response':196 'requir':157 'return':120 'schema':194 'scheme':148 'sentiment':71 'sentiment-analysis' 'settl':101 'spars':171 'specif':109 'subscript':152 'substant':188 'summar':74 'text':73 'text-summarization' 'token':83 'uncertain':232 'unclear':213 'unit':130 'usdc':103,132 'usdc-settlement' 'util':18,37 'valid':90 'via':9,28,140 'wallet':184 'web3':78 'x402':10,29,43,142 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"74899420-3b6a-458c-971b-2444909ee1f9","listingId":"9245550f-5b86-4eb2-b0f7-3ee0ae954784","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/93","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:18.008Z"}],"sources":[{"listingId":"9245550f-5b86-4eb2-b0f7-3ee0ae954784","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/93","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:18.008Z","lastSeenAt":"2026-04-23T20:31:57.863Z"}],"details":{"listingId":"9245550f-5b86-4eb2-b0f7-3ee0ae954784","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/93 \\\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 platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all priced at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v1/orders/93 endpoint returns a 402 challenge requesting up to 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/93"},{"claim":"Docs, API, pricing, and README pages all show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-call basis","Running utility operations like geocoding, validation, and data conversion with instant crypto-settled payments","Integrating pay-per-use data analytics and reporting into agent workflows"],"bestFor":["Agents or developers who want zero-signup, pay-as-you-go API access","Use cases requiring small, infrequent API calls where subscriptions are wasteful","Crypto-native workflows that can settle payments in USDC on Base"],"notFor":["High-volume production workloads needing guaranteed SLAs and detailed documentation","Users without a Base-compatible wallet or USDC holdings","Applications requiring well-documented, schema-validated API contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:51.07Z"},"updatedAt":"2026-04-23T20:31:57.863Z"}}