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 a uniform pay-per-request model settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/charges/103` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme to the specified payTo address, with a 300-second timeout window. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. The exact functionality behind the "Premium API Access" label for this particular charges endpoint is not documented — the name suggests it may relate to Stripe charge creation or lookup, but this is speculative. Without schema details for request body or response, callers will need to experiment or contact the provider for integration guidance.
Capabilities
Use cases
- —Programmatic pay-per-call API access without API keys or subscriptions
- —Agent-driven workflows that need on-demand endpoint access settled in USDC on Base
- —Testing x402 payment flows against a live endpoint
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —AI agents that can autonomously pay for API calls via crypto micropayments
- —Users who want no-commitment, no-signup API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring non-crypto payment methods
- —High-volume use cases where per-request pricing may not be cost-effective compared to subscription plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/103 \
-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, but there is no documentation, no request/response schema, and the actual functionality behind "Premium API Access" is undefined. The docs pages are all empty wallet-connect stubs.
Warnings
- —No documentation available — all doc pages return only 'Connect wallet' with no content
- —The exact functionality of /api/v1/stripe/charges/103 is unknown; 'Premium API Access' is a generic label
- —No request body schema or response schema provided
- —No OpenAPI spec or AI plugin manifest found
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/charges/103
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/charges/103