Pay-per-request premium API access via x402 on Base network, settled in USDC at $0.02/call.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities—all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/stripe/charges/49` accepts POST requests and is gated by an x402 payment challenge requiring up to 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base network, which equals $0.02. Payment is made via the x402 "exact" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The exact functionality behind this particular endpoint path (`/stripe/charges/49`) is not documented beyond the generic "Premium API Access" label. The site's documentation pages only show a "Connect wallet" prompt with no further technical details. Without additional documentation or response examples, the precise data returned by this endpoint remains unclear.
Capabilities
Use cases
- —Programmatic access to premium API services without traditional API key management
- —Agent-driven workflows that need instant, keyless API access settled in crypto
- —Demonstrating x402 payment protocol integration for pay-per-request services
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can settle USDC payments on Base network
- —Use cases requiring no-signup, no-rate-limit API access
Not for
- —Users who need detailed documentation or response schemas before integrating
- —High-volume use cases where per-request crypto settlement overhead is impractical
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/49 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of request/response schemas, no examples, and the specific functionality of this endpoint path is undocumented. The docs/pricing/README pages all just show 'Connect wallet' with no useful content.
Warnings
- —No documentation available for this specific endpoint's functionality or response format
- —The path '/api/v1/stripe/charges/49' suggests a Stripe-related charge endpoint but its purpose is unclear
- —All documentation pages beyond the landing page return only 'Connect wallet' with no technical content
- —No OpenAPI spec, no response schema, no example responses available
Citations
- —The endpoint returns a 402 challenge requiring up to 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stripe/charges/49
- —All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Payment is to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeouthttps://lowpaymentfee.com/api/v1/stripe/charges/49