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, settling payments in USDC on the Base network. The specific endpoint `/api/v1/stripe/charges/19` is listed under the provider's broader platform, which offers dozens of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all at $0.02 per request with no API keys, no rate limits, and no commitments required.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is "exact" with a 300-second timeout. The payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.
However, the specific functionality behind this particular endpoint (`/stripe/charges/19`) is not documented beyond the generic label "Premium API Access." The provider's docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The actual behavior of this endpoint — what data it returns or what action it performs — cannot be determined from the available material.
Capabilities
Use cases
- —Programmatic access to a paid API endpoint without needing API keys or subscriptions
- —Agent-driven workflows that settle per-call payments in USDC on Base
- —Testing x402 payment flows against a live endpoint
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —Agents that can autonomously pay for API calls in USDC on Base
- —Low-cost per-request API consumption without upfront commitments
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone requiring fiat-only payment methods (endpoint requires on-chain USDC on Base)
- —Production use cases where the exact response schema must be known in advance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/19 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what the endpoint actually does beyond the generic label "Premium API Access." The docs pages are empty. This is effectively a stub listing.
Warnings
- —No OpenAPI spec or request/response schema available
- —Docs, pricing, and API pages render only 'Connect wallet' with no usable content
- —The specific functionality of /api/v1/stripe/charges/19 is undocumented — 'Premium API Access' is the only description
- —The endpoint path includes 'stripe/charges' but the payment is settled on-chain via x402/USDC, which is potentially confusing
Citations
- —The endpoint returns a valid x402 402 challenge with USDC on Base, maxAmountRequired of 20000 base units ($0.02)https://lowpaymentfee.com/api/v1/stripe/charges/19
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The provider offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com