x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/trades/35` appears to be part of a broader suite of pay-per-call APIs offered by the provider, spanning categories like data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on Base.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The timeout is 300 seconds. No API keys or rate limits are advertised; access is instant upon payment.
However, the specific functionality of `/api/v1/trades/35` is unclear. The endpoint path suggests it may relate to a specific trade record or trade-related data, but it is not listed among the documented APIs on the provider's landing page. No OpenAPI schema, request/response examples, or detailed documentation were found. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. This makes it difficult to determine what data or service this particular endpoint returns.
Capabilities
Use cases
- —Fetching trade-related data with per-request USDC micropayments
- —Integrating x402-compatible payment flows into agent workflows
- —Accessing premium API data without managing API keys or subscriptions
Fit
Best for
- —Agents or developers wanting keyless, pay-per-use API access on Base
- —x402-compatible wallets and clients looking for low-cost endpoints
- —Prototyping micropayment-gated API integrations
Not for
- —Users needing detailed documentation or guaranteed SLAs before integration
- —High-volume consumers who need bulk pricing or rate-limit guarantees
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/35 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, the specific endpoint /api/v1/trades/35 is not documented on the provider's site, there is no OpenAPI schema, no request/response examples, and the docs pages are empty. The actual functionality is unknown.
Warnings
- —The endpoint /api/v1/trades/35 is not listed among the provider's documented APIs — its purpose is unclear.
- —No OpenAPI spec, request schema, or response schema available.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content.
- —Functionality must be inferred from the URL path alone; actual behavior is unverified.
Citations
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, with 300s timeouthttps://lowpaymentfee.com/api/v1/trades/35
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/35