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. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required; callers simply attach an x402 payment header to each request.
The specific resource at `/api/resource/38` is listed generically as "Premium API Access" with no further documentation on what data or functionality it returns. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, using the exact payment scheme with a 300-second timeout.
Documentation is extremely sparse. The site's /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no description of what `/api/resource/38` actually returns. The landing page lists many other endpoints (analytics, AI, finance, utils) but does not mention `/api/resource/38` by name, so its specific purpose is unknown.
Capabilities
Use cases
- —Accessing a pay-per-call API without needing API keys or subscriptions
- —Making programmatic requests settled instantly in USDC on Base
- —Agent-driven API consumption with per-request micropayments
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer crypto micropayments over traditional billing
Not for
- —Users who need detailed API documentation or guaranteed SLAs before purchasing
- —Anyone without a Base-compatible USDC wallet
- —High-volume consumers who need bulk pricing or subscription discounts
Quick start
curl -X POST https://lowpaymentfee.com/api/resource/38 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what /api/resource/38 actually does. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt with no content.
- —The specific purpose and response format of /api/resource/38 is completely unknown; the site does not list this resource path.
- —No OpenAPI spec or request/response schema is provided.
- —Cannot verify what data or service this endpoint delivers before paying.
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/resource/38
- —Site lists APIs at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/resource/38