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/91` is part of the lowpaymentfee.com platform, which offers a collection 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 accepts POST requests.
The x402 challenge confirms the endpoint is live and requires a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data the `/api/v1/trades/91` endpoint actually returns. The "91" in the path suggests a specific trade or resource ID, but its meaning is undocumented. Without documentation or example payloads, the actual functionality of this endpoint remains unclear.
Capabilities
Use cases
- —Fetching trade-related data with per-request USDC micropayments
- —Integrating pay-as-you-go API calls into agent workflows on Base
- —Accessing financial or trade information without API key management
Fit
Best for
- —Agents or apps that need keyless, pay-per-call API access
- —Developers building on Base who want USDC-settled data endpoints
- —Prototyping with low-cost per-request pricing
Not for
- —Users who need detailed API documentation or schemas before integrating
- —High-volume consumers who need bulk pricing or rate guarantees
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/91 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty. The specific meaning of 'trades/91' is unknown.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —The meaning of '/trades/91' (the '91' resource ID) is undocumented
- —Actual response payload and required request body are unknown
Citations
- —The endpoint returns a 402 x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/trades/91
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/91
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com