{"id":"3466d273-48d6-4a8d-a133-3869fe875a2d","shortId":"2egdzA","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API platform that gates a variety of endpoints behind per-request USDC micropayments on the Base network. The specific endpoint at `/api/v1/orders/68` is labeled \"Premium API Access\" and requires a POST request with an x402 payment header. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\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\nHowever, the specific `/api/v1/orders/68` endpoint lacks detailed documentation — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what this particular orders endpoint returns. The endpoint is live (returns a valid 402 challenge), but its actual functionality beyond the generic \"Premium API Access\" label is unclear.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","post-endpoint","json-response"],"categories":["api-gateway","payments"],"synonyms":["x402 API","micropayment API","pay-per-request API","USDC API access","Base network API","low fee API","crypto-gated endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The purpose and response format of /api/v1/orders/68 is undocumented — 'Premium API Access' is vague","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content","Cannot verify what data or service this specific endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/68","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/68","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is no OpenAPI schema, no request/response examples, and no meaningful documentation beyond a landing page listing. The specific /api/v1/orders/68 endpoint's purpose is entirely opaque — 'Premium API Access' is not descriptive. Docs pages render only 'Connect wallet' with no 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'list':161 'live':224 'low fee API' 'lowpaymentfee.com':35 'machin':133 'maximum':84 'metric':127 'micropay':54 'micropayment API' 'minimum':175 'network':58 'no-api-key' 'offer':8,25 'openapi':206 'order':218 'page':191 'particular':217 'pay-per-request API' 'payment':77,106 'per':51,100,164 'per-request':50 'per-request-billing' 'platform':5,22,42,119 'post':72 'post-endpoint' 'premium':66,237 'price':143,188 'prompt':198 'protocol':40 'quot':148 'rate':146,171 'render':193 'report':128 'request':52,73,101,165 'request/response':209 'requir':70,177 'return':220,225 'schema':207 'second':115 'sent':108 'sentiment':135 'specif':60,180 'summar':138 'text':137 'timeout':116 'token':147 'unclear':242 'unit':90 'usdc':53,92,102 'usdc-micropayment' 'use':103 'util':13,30,153 'valid':155,227 'varieti':46 'wallet':197 'web3':142 'x402':2,19,39,76,80 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"665472f6-4df1-4185-ab2a-45b49639726f","listingId":"3466d273-48d6-4a8d-a133-3869fe875a2d","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/68","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:49.756Z"}],"sources":[{"listingId":"3466d273-48d6-4a8d-a133-3869fe875a2d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/68","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:49.756Z","lastSeenAt":"2026-04-23T20:01:33.287Z"}],"details":{"listingId":"3466d273-48d6-4a8d-a133-3869fe875a2d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/68 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/68"},{"claim":"The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/orders/68"}],"useCases":["Accessing premium API data with per-call USDC micropayments on Base","Integrating pay-as-you-go API calls into agent workflows without API key management","Programmatic purchasing of API access using x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-request API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Applications requiring high-throughput with predictable flat-rate pricing","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:22:23.688Z"},"updatedAt":"2026-04-23T20:01:33.287Z"}}