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 advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint `/api/v1/stripe/charges/83` returned a live 402 challenge with an `exact` payment scheme requiring up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this equates to $0.02 per call. Payment is made via the x402 protocol's `X-PAYMENT` header; no API keys or accounts are needed. The challenge specifies a 300-second timeout and pays to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.
However, the actual functionality behind this particular endpoint (`/stripe/charges/83`) is unclear. The provider's landing page does not list it among its documented APIs, and the description is simply "Premium API Access" with no schema, example request/response, or documentation. The docs, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. Without knowing what data or service this endpoint returns, consumers should treat it as an opaque paid endpoint until more documentation is available.
Capabilities
Use cases
- —Programmatic pay-per-call access to a premium API without requiring API keys or subscriptions
- —Agent-driven workflows that need to pay for API calls on-the-fly using USDC on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —AI agents that can autonomously pay for API calls via crypto
- —Users who want no-signup, no-rate-limit API access
Not for
- —Users who need clear documentation of request/response schemas before integrating
- —High-volume consumers who need bulk pricing or SLAs
- —Anyone without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/83 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no request/response schema, no examples, and the specific functionality of this endpoint is unknown. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —The actual functionality of /api/v1/stripe/charges/83 is undocumented — the provider's landing page does not list this endpoint among its available APIs.
- —All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no usable content.
- —No request or response schema is available; consumers cannot know what to send or what they will receive.
- —The endpoint path includes 'stripe/charges' which may imply interaction with Stripe payment infrastructure, but this is unconfirmed.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base (=$0.02)https://lowpaymentfee.com/api/v1/stripe/charges/83
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/charges/83
- —The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com