x402-gated premium API access on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific resource `/api/v1/trades/115` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.
The endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) via the "exact" scheme. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json and the input method is HTTP POST.
However, the specific functionality of `/api/v1/trades/115` is unclear. The site's landing page lists categories like Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, but does not explicitly list a `/trades/` path. The "115" in the URL may be a resource or trade ID. Documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content. Without further documentation, the exact request body schema and response format for this particular endpoint remain unknown.
Capabilities
Use cases
- —Fetching trade-related data with per-request USDC micropayments
- —Integrating pay-per-call APIs into agent workflows without API keys
- —Accessing financial or trading information on-demand via x402 protocol
Fit
Best for
- —Agents or developers wanting keyless, pay-per-use API access
- —x402-compatible wallets on Base network
- —Low-friction micropayment API consumption at $0.02/call
Not for
- —Users needing detailed API documentation or schemas before integration
- —High-volume use cases where per-request pricing may add up
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/115 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and the specific purpose of /api/v1/trades/115 is not described anywhere in the crawled material. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt.
Warnings
- —The specific endpoint /api/v1/trades/115 is not listed on the site's landing page; its exact functionality is unknown.
- —All documentation pages (docs, pricing, README) returned no useful content — only 'Connect wallet'.
- —No request body schema or response schema is available; callers must discover behavior empirically.
- —The '115' in the path may be a specific resource ID, meaning this listing may represent a single record rather than a general-purpose endpoint.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/trades/115
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/115
- —The site advertises $0.02 per request across all listed endpoints with no API keys, no rate limitshttps://lowpaymentfee.com
- —Listed API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com