Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/trades/185` suggests a finance/trading-related 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.
Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge confirms the endpoint is live and accepts POST requests with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are required — access is granted purely through per-request micropayment. The timeout for payment settlement is 300 seconds.
Documentation is extremely sparse. The crawled docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no example request/response bodies, and no description of what the `/api/v1/trades/185` endpoint actually returns. The endpoint appears to be part of a trading or market data category based on the URL path structure, but this is inference only.
Capabilities
Use cases
- —Fetching trade or market data with per-request payment and no subscription
- —Integrating pay-as-you-go financial data into autonomous agents
- —Accessing premium trading information without API key management
Fit
Best for
- —Agents needing on-demand trade/market data without signup
- —Developers testing x402 payment flows on Base
- —Low-volume consumers who prefer per-call pricing over subscriptions
Not for
- —High-volume consumers needing bulk pricing or batch endpoints
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/185 \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing and network details, but there is no documentation, no request/response schema, and no explanation of what the trades/185 endpoint actually returns. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available
- —Exact response format for /api/v1/trades/185 is unknown
- —Docs, pricing, and API pages all render only 'Connect wallet' with no technical content
- —The specific resource (trades/185) purpose is inferred from URL path only
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base network, maxAmountRequired 20000 base unitshttps://lowpaymentfee.com/api/v1/trades/185
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/185