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/38` 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 and requests 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/38` is not documented. The landing page lists many other endpoints (analytics, AI, finance, utilities) but does not describe this particular policies route. There is no OpenAPI spec, no request/response schema documentation, and the docs, pricing, and API pages all resolve to a minimal "Connect wallet" prompt with no further detail. As a result, while the endpoint is confirmed live and the pricing is clear, the actual capability and expected input/output remain unknown.
Capabilities
Use cases
- —Accessing a premium API resource with per-request USDC micropayments on Base
- —Integrating x402-compatible agents that pay per call without API key management
- —Testing x402 payment flows against a live endpoint
Fit
Best for
- —Developers experimenting with x402 pay-per-request protocols
- —Agents that need keyless, pay-as-you-go API access on Base
- —Projects requiring low-cost ($0.02) per-call pricing with no commitments
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring free or subscription-based access patterns
- —Use cases needing a well-documented request/response contract
Quick start
# The endpoint requires an x402 payment header with USDC on Base.
# 1. Send a POST to get the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/policies/38
# 2. Parse the 402 response, construct an X-PAYMENT header
# with a signed USDC payment of 0.02 USDC, then retry:
curl -X POST https://lowpaymentfee.com/api/v1/policies/38 \
-H "X-PAYMENT: <signed-x402-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge and pricing is clear ($0.02 USDC on Base). However, the specific functionality of /api/v1/policies/38 is completely undocumented — no OpenAPI spec, no request/response schema, no examples, and all doc pages are empty stubs. This is effectively a stub listing.
Warnings
- —The specific functionality of /api/v1/policies/38 is not documented anywhere on the site.
- —No OpenAPI specification or request/response schema is available.
- —All documentation pages (/docs, /api, /pricing, /README) resolve to a minimal 'Connect wallet' prompt with no content.
- —The platform lists many endpoints on its landing page but /api/v1/policies/38 is not among them — its purpose is unknown.
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC (0.02 USDC) on Base networkhttps://lowpaymentfee.com/api/v1/policies/38
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/policies/38