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 payment wall. It is part of a broader platform offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network, payable in USDC.
The specific endpoint `/api/v1/stripe/subscriptions/190` is listed as "Premium API Access" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 exact scheme to a specified wallet address on Base. The endpoint accepts POST requests and returns application/json. No API keys or rate limits are advertised; access is granted purely through per-call x402 micropayments.
The platform's documentation pages (docs, pricing, README) all resolve but contain only a "Connect wallet" prompt, providing no further technical detail about request/response schemas, parameters, or what data this particular subscription endpoint actually returns. The endpoint name suggests it may relate to Stripe subscription management, but no concrete documentation confirms the payload structure or response format. Because of this lack of documentation, the actual functionality behind this endpoint remains unclear.
Capabilities
Use cases
- —Programmatic access to a premium API resource with per-call USDC micropayments
- —Agent-driven API consumption without API keys or subscriptions
- —Paying for API access on-chain via Base network USDC
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents with x402-compatible payment capabilities
- —Users who prefer on-chain micropayments over traditional billing
Not for
- —Users needing detailed API documentation before integrating
- —Applications requiring guaranteed SLAs or support contracts
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/190 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI schema, no documentation of request/response payloads, and the docs/pricing/README pages are all 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, pricing, and README pages all show only 'Connect wallet'
- —Request and response schemas are unknown; no OpenAPI spec provided
- —The endpoint name references 'stripe/subscriptions' but no details explain what it does
- —Functionality is entirely opaque without integration testing
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/190
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/190
- —Documentation pages resolve but contain only 'Connect wallet' contenthttps://lowpaymentfee.com/docs