Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource at `/api/v1/charges/282` 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 are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The `maxAmountRequired` is 20000 base units, which at 6 decimals for USDC equals $0.02. The payment scheme is "exact" with a 300-second timeout. The response MIME type is `application/json`.
However, the specific functionality behind `/api/v1/charges/282` is not documented — the title "Premium API Access" is generic and does not describe what data or service this particular endpoint returns. The provider's landing page lists numerous other endpoints (metrics, reports, sentiment analysis, summarization, price feeds, geocoding, etc.) but does not map `/api/v1/charges/282` to any of them. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no substantive content. Without knowing what this endpoint actually does, agents should treat it as an opaque paid resource.
Capabilities
Use cases
- —Programmatic access to a paid API resource without needing API keys or subscriptions
- —Agent-driven workflows that settle per-call payments in USDC on Base
- —Testing x402 payment protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers exploring x402 payment-gated APIs
- —AI agents with USDC wallets on Base seeking pay-per-use services
- —Low-commitment, no-signup API consumption
Not for
- —Users who need clearly documented endpoint behavior before paying
- —High-volume use cases where $0.02/request adds up without known value
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/charges/282 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and the x402 challenge is well-formed with clear pricing ($0.02 USDC on Base). However, the specific functionality of /api/v1/charges/282 is completely undocumented — there is no schema, no example request/response, and no description beyond the generic 'Premium API Access' title. All doc pages returned only 'Connect wallet' with no content.
Warnings
- —The specific functionality of /api/v1/charges/282 is unknown — 'Premium API Access' is a generic label with no documentation
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content
- —No input or output schema is provided beyond the basic HTTP POST method
- —Cannot determine what data or service this endpoint actually returns
Citations
- —All endpoints priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/charges/282
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/charges/282
- —Provider offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com