Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/trades/164` sits within a broader platform that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge for this endpoint confirms it is live, accepting POST requests, and requires payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json.
However, the specific functionality of `/api/v1/trades/164` is unclear. The path suggests a trades-related resource (possibly retrieving or executing a specific trade record), but no documentation, request schema, or response schema is available for this particular endpoint. The platform's landing page lists categories like Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, but does not explicitly list a `/trades/` path. Without further documentation, the exact input parameters and output format remain unknown.
Capabilities
Use cases
- —Retrieving trade-related data or records via a single paid API call
- —Integrating pay-per-call trade information into automated agent workflows
- —Accessing premium financial data without subscription or API key management
Fit
Best for
- —Agents needing on-demand trade data with no subscription overhead
- —Developers who want keyless, pay-as-you-go API access settled in USDC on Base
- —Low-volume consumers who prefer per-call pricing over monthly plans
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited tiers
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/164 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"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, no request/response schema, and the specific purpose of /api/v1/trades/164 is not described anywhere in the crawled material. The docs, pricing, and API pages all returned only 'Connect wallet' with no usable content.
Warnings
- —No documentation available for the /api/v1/trades/164 endpoint — its exact purpose and expected input/output are unknown.
- —The /trades/ path is not listed among the platform's advertised API categories, raising questions about whether this is a public or internal endpoint.
- —Docs, pricing, and API pages returned no meaningful content (only 'Connect wallet'), suggesting documentation may be gated or incomplete.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/trades/164
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/trades/164