Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform share a uniform $0.02-per-request pricing model, settled in USDC on the Base network with no API keys, rate limits, or commitments required.
The specific endpoint `/api/v1/payments/271` is listed as "Premium API Access" but the crawled material does not clarify what data or functionality this particular path returns — it does not appear in the provider's public API catalog. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The provider's landing page lists 16 other endpoints across analytics, AI inference (sentiment, summarization, classification, embeddings), finance (price feeds, exchange rates, token quotes, gas estimates), and utilities (geocoding, validation, conversion, generation), all at the same $0.02 price point. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail, so request/response schemas for this or any endpoint are unknown.
Capabilities
Use cases
- —Accessing premium API functionality with per-call USDC micropayments on Base
- —Agent-driven API consumption without pre-registration or API keys
- —Programmatic pay-as-you-go access to data or services
Fit
Best for
- —Developers or agents wanting keyless, pay-per-call API access
- —x402-compatible wallets and agent frameworks on Base
- —Low-commitment, no-subscription API consumption
Not for
- —Users who need detailed API documentation or schemas before purchasing
- —High-volume consumers who prefer flat-rate or subscription pricing
- —Users without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/271 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but the specific functionality of /api/v1/payments/271 is undocumented and does not appear in the provider's public catalog. No request/response schemas, no documentation beyond a landing page listing, and all doc pages return only 'Connect wallet'. Effectively a stub listing.
Warnings
- —The endpoint path /api/v1/payments/271 is not listed in the provider's public API catalog — its actual functionality is unknown.
- —All documentation, pricing, API, and README pages return only 'Connect wallet' with no technical content.
- —No request or response schema is available; callers cannot know what to send or expect back.
- —The 'Premium API Access' label is generic and does not describe a specific capability.
Citations
- —The provider lists 16 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, all at $0.02/request.https://lowpaymentfee.com
- —Pricing is $0.02 per request with no API keys, no rate limits, instant access, on Base network.https://lowpaymentfee.com
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/payments/271