x402-gated premium API access on Base, paid per-request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. 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 are pay-per-request with no API keys, no rate limits, and no commitments required.
The specific endpoint at `/api/v1/stripe/subscriptions/197` is labeled "Premium API Access" and requires payment of up to 20,000 base units of USDC on the Base network. Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is settled on-chain via the x402 exact scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a maximum timeout of 300 seconds.
The endpoint accepts HTTP POST requests and returns `application/json`. However, the exact functionality behind "Premium API Access" is not documented in the crawled material — the endpoint path suggests a Stripe subscription resource, but no schema, request parameters, or response format details are available. The platform's docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further documentation. Without additional information about what this specific endpoint returns or accepts, its practical utility is unclear.
Capabilities
Use cases
- —Accessing a premium API resource with per-request USDC micropayments on Base
- —Integrating x402-compatible agent workflows that auto-pay for API calls
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that need keyless, pay-per-request API access on Base
- —Projects exploring crypto micropayment-based API monetization
Not for
- —Users who need detailed API documentation or well-defined schemas before integrating
- —Applications requiring free or fiat-only payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/197 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty. The endpoint path ('stripe/subscriptions/197') is opaque and unexplained.
Warnings
- —No documentation available — all doc/pricing/API pages return only 'Connect wallet' with no content.
- —The actual functionality behind 'Premium API Access' is completely undocumented; the endpoint path suggests a Stripe subscription resource but this is unverified.
- —No request or response schema is provided; callers cannot know what to send or what to expect back.
- —No OpenAPI spec or AI plugin manifest found.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/197
- —maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02https://lowpaymentfee.com/api/v1/stripe/subscriptions/197
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com