Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.
What it does
This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/policies/29` is labeled "Premium API Access" and accepts POST requests, settling payments in USDC on the Base network via the x402 protocol.
The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and no minimum commitments required. The x402 challenge confirms the endpoint is live, requesting a maximum of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The payment timeout is 300 seconds.
However, the specific functionality behind `/api/v1/policies/29` is unclear. The landing page lists many endpoints across categories (analytics, AI, finance, utilities), but this particular path does not appear in any of the documented endpoint lists. There is no OpenAPI spec, no detailed documentation, and the docs/pricing/API pages all render only a "Connect wallet" prompt with no further content. The actual request schema, expected input parameters, and response format for this endpoint are unknown.
Capabilities
Use cases
- —Accessing premium API functionality with per-request USDC micropayments
- —Agent-driven API consumption without API keys or subscriptions
- —Programmatic access to paid endpoints using x402 payment protocol
Fit
Best for
- —Developers wanting keyless, pay-as-you-go API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation before integrating
- —Applications requiring guaranteed SLAs or support contracts
- —Users without access to USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/29 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC per call on Base). However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response schema, and the specific purpose of /api/v1/policies/29 is undocumented. This is effectively a stub listing.
Warnings
- —The endpoint /api/v1/policies/29 is not listed among the documented endpoints on the landing page — its specific functionality is unknown.
- —No OpenAPI spec or detailed documentation is available; docs, pricing, and API pages only show a 'Connect wallet' prompt.
- —Request body schema and response format are completely undocumented.
- —The platform lists many endpoint categories but provides no evidence of actual working functionality behind them.
Citations
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/policies/29
- —The endpoint accepts POST requests and returns application/json.https://lowpaymentfee.com/api/v1/policies/29
- —Docs, pricing, and API pages render only a 'Connect wallet' prompt with no additional content.https://lowpaymentfee.com/docs