x402-gated premium API access on Base, paid per-request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. The endpoint is located at `/api/v1/stripe/subscriptions/194` and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 "exact" scheme.
The x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this converts to $0.02 per request, consistent with the site's stated pricing of $0.02/request across all its endpoints. The provider advertises no API keys, no rate limits, and instant access.
The broader lowpaymentfee.com platform offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. However, this specific endpoint (`/api/v1/stripe/subscriptions/194`) is labeled "Premium API Access" without further documentation on what data or functionality it returns. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. Without request/response examples or schema documentation, the actual behavior of this endpoint remains unclear.
Capabilities
Use cases
- —Agent-initiated API calls with automatic per-request USDC micropayments
- —Accessing premium data or services without traditional API key registration
- —Programmatic pay-as-you-go API consumption on Base L2
Fit
Best for
- —Developers or agents wanting keyless, pay-per-call API access
- —Users who prefer crypto micropayments over subscription billing
- —Base network users with USDC looking for low-friction API access
Not for
- —Users needing detailed API documentation or response schemas before integrating
- —High-volume consumers who need bulk pricing or rate guarantees
- —Anyone without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/194 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation on what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. The endpoint path ('stripe/subscriptions/194') is opaque and the description is just 'Premium API Access' with no further detail.
Warnings
- —No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet' with no content.
- —The endpoint path references 'stripe/subscriptions' which is unusual for an x402 endpoint and its actual functionality is unknown.
- —No request body schema or response schema is documented.
- —Cannot verify what data or service this endpoint actually provides.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/194
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/194