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. The specific resource `/api/v1/trades/113` 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 gated behind x402 micropayments on the Base network.
The endpoint is live and returns a valid x402 challenge. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which at 6 decimals equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The timeout for payment settlement is 300 seconds.
However, the specific functionality of `/api/v1/trades/113` is unclear. The path suggests a trade-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 broader site lists categories like "Finance & Web3" with price feeds, exchange rates, token quotes, and gas estimates, so this trades endpoint likely falls within that domain. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content, leaving the actual behavior undocumented.
Capabilities
Use cases
- —Retrieving trade-related data via a single micropayment without needing an API key
- —Integrating pay-per-call financial data into autonomous agent workflows
- —Programmatic access to trade records settled on Base L2 in USDC
Fit
Best for
- —Agents or bots that need keyless, pay-as-you-go API access
- —Developers experimenting with x402 micropayment-gated endpoints
- —Low-volume consumers who want no subscription or commitment
Not for
- —High-volume production workloads where per-request pricing adds up quickly
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/113 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no explanation of what /api/v1/trades/113 actually returns. The docs pages are empty (just 'Connect wallet'). The listing is effectively a stub with confirmed liveness and pricing.
Warnings
- —No documentation available — docs, pricing, and API pages all render only 'Connect wallet'
- —The specific functionality of /api/v1/trades/113 is unknown; no input or output schema provided
- —No OpenAPI spec, no examples, and no description beyond the generic 'Premium API Access' label
- —The broader platform lists many endpoints but none match the /trades/ path pattern, raising questions about what this endpoint does
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/trades/113
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/113
- —Docs, pricing, and API pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs