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, settling payments in USDC on the Base network. The specific resource path (`/api/v1/stripe/subscriptions/195`) suggests a subscription-related endpoint, though the x402 challenge uses the "exact" (one-shot) payment scheme rather than a recurring subscription model.
The endpoint is live and returns a valid x402 challenge. The maximum amount required is 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per request. The broader lowpaymentfee.com platform advertises a uniform $0.02/request pricing across multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. The platform emphasizes no API keys, no rate limits, and instant access.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what this particular endpoint returns. The "Premium API Access" label and the subscription-style URL path provide minimal clarity on the actual functionality. Agents should treat this as a low-documentation endpoint with uncertain output.
Capabilities
Use cases
- —Programmatic access to a premium subscription resource via x402 micropayment
- —Agent-driven API calls that settle instantly in USDC on Base
- —Accessing subscription data without traditional API key management
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users comfortable with USDC payments on Base L2
- —Scenarios requiring no-commitment, no-rate-limit API consumption
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —Applications requiring free or fiat-only payment methods
- —Production systems that need guaranteed SLA or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/195 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The actual functionality behind 'Premium API Access' is unclear, making this effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or output schema provided; actual response format is unknown
- —The URL path references 'stripe/subscriptions' but the payment mechanism is x402/USDC — the relationship to Stripe is unclear
- —No request body schema documented; unclear what input the POST endpoint expects
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/195
- —Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/195