{"id":"3fe4362c-fd37-40cb-be08-9d9f4eb6134c","shortId":"YCs3V9","kind":"x402","title":"Pay-per-request API suite on Base via x402 — analytics, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API suite 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 collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint at `/api/v1/orders/50` is listed as \"Premium API Access\" and accepts POST requests. 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 settled on-chain via the x402 \"exact\" scheme with a 300-second timeout.\n\nThe broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation beyond the landing page 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 available for any endpoint, including this one. The actual data or functionality returned by `/api/v1/orders/50` is unclear from the available material.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","post-endpoint","pay-per-use"],"categories":["api-marketplace","infrastructure"],"synonyms":["low payment fee","x402 api","pay per request api","usdc api","base network api","micropayment api","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or JSON schema provided for request or response formats.","The specific functionality of /api/v1/orders/50 ('Premium API Access') is not described anywhere; it is unclear what this endpoint actually returns.","The platform lists many endpoints on its landing page but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/50","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/50","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, confirming it accepts payments. However, there is no OpenAPI schema, no request/response examples, and all documentation pages beyond the landing page are empty ('Connect wallet' only). The purpose of '/api/v1/orders/50' specifically is unclear — the generic 'Premium API Access' label provides no detail on what data or functionality is 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'x402-payment'","prices":[{"id":"fab4ad35-242e-4373-9762-b3d542a58ab7","listingId":"3fe4362c-fd37-40cb-be08-9d9f4eb6134c","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/50","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:27.682Z"}],"sources":[{"listingId":"3fe4362c-fd37-40cb-be08-9d9f4eb6134c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/50","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:27.682Z","lastSeenAt":"2026-04-23T18:03:20.358Z"}],"details":{"listingId":"3fe4362c-fd37-40cb-be08-9d9f4eb6134c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/50 \\\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","source_url":"https://lowpaymentfee.com/api/v1/orders/50"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/orders/50"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-call USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","On-demand API calls where usage is sporadic and subscriptions are undesirable"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native micropayment billing over subscriptions"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited plans","Anyone without a Base-compatible wallet holding USDC"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.611Z"},"updatedAt":"2026-04-23T18:03:20.358Z"}}