x402-gated premium API access on Base, paid per-call 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 settlement on the Base network using USDC.
The specific endpoint `/api/v1/stripe/subscriptions/177` is labeled "Premium API Access" and returns a valid x402 challenge with a maximum amount of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The endpoint accepts HTTP POST requests and returns `application/json` responses. Payment is made via the x402 exact scheme, settling to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
Notably, the endpoint path references "stripe/subscriptions" which is somewhat unusual for an x402-settled API — the actual functionality behind this specific endpoint is not documented beyond the label "Premium API Access." The platform's docs, pricing, and API pages all render only a wallet-connect prompt with no additional documentation. Without further details on what data or service this endpoint actually returns, consumers should treat this as a minimally documented offering.
Capabilities
Use cases
- —Programmatic access to a premium API service paid per-call in USDC on Base
- —Agent-driven workflows that need keyless, pay-as-you-go API access
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —Agents that can settle USDC on Base for per-request API access
- —Users who want no-signup, no-API-key access to hosted services
Not for
- —Users who need detailed documentation or guaranteed SLAs before purchasing
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/177 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is essentially no documentation about what the endpoint actually does or returns. The docs, pricing, and API pages all render only a wallet-connect prompt. The endpoint path ('stripe/subscriptions/177') is opaque, and no input/output schema is provided beyond the basic x402 outputSchema stub. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages only show a wallet-connect prompt with no content.
- —The actual functionality behind 'Premium API Access' at this specific path is unknown; no request/response schema is documented.
- —The endpoint path references 'stripe/subscriptions' which is ambiguous in an x402 context — unclear what service is provided.
- —No OpenAPI spec, no examples, and no detailed description of inputs or outputs.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/stripe/subscriptions/177
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stripe/subscriptions/177