{"id":"94655383-eae8-40e0-81a6-53ccbd45ccff","shortId":"UtBzcg","kind":"x402","title":"Pay-per-request API platform on Base (USDC) via x402 — $0.02/call, no API keys required.","tagline":"Pay-per-request API platform on Base (USDC) via x402 — $0.02/call, no API keys required.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are paid per-request using USDC on the Base network, with no API keys, rate limits, or subscription commitments required. The x402 protocol handles payment inline: callers attach a payment header and the server processes the request after verifying the micropayment.\n\nThe specific endpoint at `/api/v1/orders/80` 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). The platform advertises a uniform $0.02 price across all its endpoints.\n\nNote that while the landing page lists many endpoint categories (sentiment analysis, text summarization, embeddings, price feeds, geocoding, etc.), the crawled documentation pages returned only \"Connect wallet\" with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The actual functionality behind this particular `/api/v1/orders/80` endpoint is unclear beyond its \"Premium API Access\" label.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base-network","no-api-key","post-endpoint","micropayment"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","pay per request api","micropayment api","usdc api access","base network api","402 payment api"],"warnings":["No OpenAPI or schema documentation available — endpoint behavior is unknown beyond the 'Premium API Access' label","All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no useful content","The specific purpose and expected input/output of /api/v1/orders/80 is not documented anywhere in the crawl","The platform lists many endpoint categories on its landing page but none could be verified for actual functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/80","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/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and the actual functionality of /api/v1/orders/80 is undefined. The docs, pricing, API, and README pages all returned only 'Connect wallet' with no 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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/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:33.102Z"}],"sources":[{"listingId":"94655383-eae8-40e0-81a6-53ccbd45ccff","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/80","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:33.102Z","lastSeenAt":"2026-04-24T23:02:32.695Z"}],"details":{"listingId":"94655383-eae8-40e0-81a6-53ccbd45ccff","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/80 \\\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":"Uniform pricing of $0.02 per request across all endpoints","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/80"},{"claim":"Endpoint accepts POST method per outputSchema","source_url":"https://lowpaymentfee.com/api/v1/orders/80"}],"useCases":["Accessing premium API data with per-call USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to analytics, AI, finance, or utility endpoints"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.602Z"},"updatedAt":"2026-04-24T23:02:32.695Z"}}