Pay-per-call premium API access on Base network via x402 protocol at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/trades/45` suggests a finance/trading data endpoint, though the exact response payload is not documented. The provider operates a broader platform offering Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utility APIs, all priced at $0.02 per request and settled in USDC on the Base network.
The endpoint accepts POST requests and requires an X-PAYMENT header conforming to x402 version 1. Payment is made in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base) with a max amount of 20,000 base units ($0.02 given USDC's 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is independently paid. The timeout for payment settlement is 300 seconds.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no example request/response bodies, and no detailed description of what the `/api/v1/trades/45` endpoint returns. The endpoint is confirmed live (returns 402 challenge correctly).
Capabilities
Use cases
- —Fetching trade data for a specific trade ID on demand
- —Programmatic access to trading information without subscription
- —Agent-driven data retrieval with automatic crypto micropayments
Fit
Best for
- —Developers wanting zero-commitment pay-per-call trade data
- —AI agents that can settle x402 payments autonomously
- —Users who prefer no API key management
Not for
- —High-volume bulk data retrieval where per-call pricing adds up
- —Users who need detailed documentation or guaranteed SLAs
- —Anyone unable to pay in USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/45 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge, but there is no documentation, no schema, no example responses, and no description of what the trades/45 endpoint actually returns. Effectively a stub listing.
Warnings
- —No documentation available — docs/pricing/README pages only show 'Connect wallet'
- —No OpenAPI or output schema describing the response format
- —The specific endpoint /api/v1/trades/45 is not listed on the provider's homepage; its exact purpose is unclear
- —No example request or response bodies available
Citations
- —Endpoint returns 402 with x402 version 1 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/trades/45
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/45