x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.
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/81` is one of many listed on the provider's site, which offers a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
The x402 challenge confirms the endpoint is live, accepting POST requests and requiring an exact-scheme payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely via the x402 payment header.
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 schema, no request/response examples, and no description of what this specific endpoint (`stripe/charges/81`) actually returns. The provider's landing page groups endpoints into categories but does not document individual input parameters or output formats. Without documentation, the actual functionality behind this particular endpoint path is unclear.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint with per-request USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Testing x402 payment flows against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring no-signup, no-API-key access
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Applications requiring known, well-documented request/response schemas
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/81 \
-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 zero documentation on what the endpoint actually does, no OpenAPI schema, no request/response examples, and the docs pages are empty. The endpoint path ('stripe/charges/81') is not listed among the provider's advertised APIs, making its purpose unclear. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.
- —The specific endpoint path /api/v1/stripe/charges/81 is not listed among the provider's advertised API catalog, making its purpose unknown.
- —No OpenAPI schema, no request/response examples, and no description of input parameters or output format.
- —The provider lists many endpoint categories (AI, finance, analytics, etc.) but none match this specific path, raising questions about what it returns.
Citations
- —The provider advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge requires up to 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network, equaling $0.02.https://lowpaymentfee.com/api/v1/stripe/charges/81
- —Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt with no further content.https://lowpaymentfee.com/docs