Pay-per-call trade data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/trades/20` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities. All endpoints use the x402 protocol for payment, settling in USDC on the Base network. The specific endpoint probed here is labeled "Premium API Access" and appears to be a trades-related resource (based on the URL path `/trades/20`), though the exact data returned is not documented in the crawled material.
The x402 challenge confirms the endpoint is live and accepts payments via the "exact" scheme on Base. The maximum amount required is 20,000 base units of USDC (the asset at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`), which with 6 decimals equals $0.02 per request. This is consistent with the site's advertised flat pricing of $0.02 per request across all endpoints. The platform advertises no API keys, no rate limits, and instant access.
Documentation is extremely sparse — the `/docs`, `/api`, `/pricing`, and `/README` pages all rendered only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/trades/20` endpoint actually returns. The `outputSchema` in the x402 challenge only indicates it accepts HTTP POST requests. Without documentation on request body format or response structure, agents would need to experiment to determine how to use this endpoint effectively.
Capabilities
Use cases
- —Fetching trade data on a per-request basis without subscription commitments
- —Programmatic access to trade information settled via USDC on Base
- —Agent-driven data retrieval with built-in micropayment settlement
Fit
Best for
- —Developers wanting zero-setup API access with crypto micropayments
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer pay-as-you-go pricing without API key management
Not for
- —Users needing detailed API documentation or response schema guarantees before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/20 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation on request format, response schema, or what data the /trades/20 endpoint actually returns. The docs pages are empty beyond a wallet connect prompt, and no OpenAPI spec exists.
Warnings
- —No documentation available for request body format or response schema
- —The /docs, /pricing, /api, and /README pages contain no substantive content
- —The exact nature of the data returned by /api/v1/trades/20 is unknown — 'Premium API Access' is a generic label
- —No OpenAPI or machine-readable schema provided
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/trades/20
- —The platform advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/20