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. 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, settled in USDC.
The specific endpoint `/api/v1/stripe/subscriptions/198` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
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 spec, no request/response schema beyond the x402 outputSchema stub, and no description of what data or functionality this particular endpoint actually returns. The endpoint name ("stripe/subscriptions") suggests it may relate to Stripe subscription management, but this is unconfirmed. Prospective users should be aware that the actual behavior of this endpoint is undocumented.
Capabilities
Use cases
- —Programmatic access to a premium API endpoint without traditional API key registration
- —Agent-driven workflows that need to pay per-call using USDC on Base
- —Testing x402 protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —AI agents with USDC wallets on Base seeking pay-per-call endpoints
- —Users who want keyless, instant API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone looking for a well-documented, production-grade API with clear response schemas
- —Users without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/198 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (returns a valid x402 402 challenge), but there is virtually no documentation — no OpenAPI spec, no request/response schemas, no explanation of what the endpoint actually does. The docs pages are empty beyond a wallet-connect prompt. The endpoint path ('stripe/subscriptions/198') is opaque and unexplained.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or request/response schema provided; actual endpoint behavior is unknown.
- —Endpoint path suggests Stripe subscription functionality but this is unconfirmed and undocumented.
- —No examples of expected input or output are available.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout.https://lowpaymentfee.com/api/v1/stripe/subscriptions/198
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/stripe/subscriptions/198