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/116` 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 utility services. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or commitments required.
The x402 challenge for this particular endpoint advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. The endpoint accepts HTTP POST requests and returns application/json.
However, the specific functionality of `/api/v1/trades/116` is unclear. It does not appear in the site's listed API catalog, and the path pattern (`/trades/116`) suggests it may return data about a specific trade or transaction identified by ID 116. No request/response schema documentation was found, and the crawled docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without documentation or example payloads, the exact input parameters and response format remain unknown.
Capabilities
Use cases
- —Fetching trade or transaction data on a per-call payment basis
- —Integrating pay-per-use API access into agent workflows without API key management
- —Accessing financial or trade information settled via USDC on Base
Fit
Best for
- —Agents needing keyless, pay-per-call API access
- —Developers wanting low-friction crypto-settled data endpoints
- —Use cases requiring no subscription or rate-limit constraints
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —High-volume batch processing where per-call pricing adds up
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/116 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but the specific /trades/116 resource is not documented anywhere on the site. No request/response schema, no examples, and all doc pages returned only 'Connect wallet' with no content. The exact functionality is unknown.
Warnings
- —The specific endpoint /api/v1/trades/116 is not listed in the site's published API catalog — its purpose is unclear
- —All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no substantive content
- —No request body schema or response schema is available
- —No OpenAPI spec or AI plugin manifest found
Citations
- —Platform pricing is $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network with exact schemehttps://lowpaymentfee.com/api/v1/trades/116
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/116
- —Platform offers endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com