x402-gated premium API access on Base, paid per-call in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform follow the same x402 payment model: callers pay per request in USDC on the Base network with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/stripe/charges/116` is labeled "Premium API Access" but its exact functionality is not documented beyond that title. The x402 challenge confirms it is live and accepts POST requests, settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The platform's landing page confirms a uniform $0.02/request pricing across all endpoints.
Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality this particular endpoint returns. Prospective callers should be aware that the endpoint's purpose is unclear and may require experimentation or contacting the provider to understand what it actually does.
Capabilities
Use cases
- —Paying per-call for API access without needing API keys or subscriptions
- —Integrating x402 payment flows into agent-based workflows
- —Testing x402 protocol payment challenges on Base network
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —Agents that need keyless, pay-per-use API access
- —Users who want to avoid subscription commitments for occasional API calls
Not for
- —Anyone needing documented request/response schemas before integrating
- —High-volume use cases where $0.02/request adds up without volume discounts
- —Users who cannot transact in USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/116 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear at $0.02/request in USDC on Base. However, there is no documentation, no OpenAPI spec, no request/response schema, and the endpoint's actual functionality ("Premium API Access") is completely undefined. This is effectively a stub listing.
Warnings
- —Endpoint functionality is undocumented — 'Premium API Access' provides no indication of what data or service is returned.
- —All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no usable content.
- —No OpenAPI spec or request/response schema available.
- —The endpoint path '/api/v1/stripe/charges/116' suggests Stripe integration but no details are provided.
Citations
- —Uniform $0.02/request pricing across all endpoints, no API keys, no rate limitshttps://lowpaymentfee.com
- —Endpoint is live and returns x402 challenge with maxAmountRequired of 20000 base units USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/116
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/charges/116
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com