Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/trades/104` suggests a finance/trading-related data endpoint, though the exact response payload is not documented. The provider operates a broader platform offering Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utility APIs, all priced uniformly at $0.02 per request.
Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge confirms the endpoint is live and accepts POST requests with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response bodies, and no description of what data the `/trades/104` endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to know what to expect from a successful call.
Capabilities
Use cases
- —Fetching trade or financial data without subscription commitments
- —Programmatic access to premium data with per-request USDC micropayments
- —Agent-driven workflows that need on-demand paid API calls settled on-chain
Fit
Best for
- —Developers wanting no-signup, pay-as-you-go API access
- —AI agents with Base network USDC wallets needing trade data
- —Projects that prefer on-chain micropayments over traditional API key billing
Not for
- —Users who need detailed API documentation before integrating
- —High-volume consumers who want bulk pricing or subscriptions
- —Developers without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/104 \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, but there is virtually no documentation on what the endpoint returns, what inputs it expects, or what 'trades/104' represents. No OpenAPI schema, no examples, and all doc pages are empty.
Warnings
- —No documentation available — all doc/pricing/README pages show only 'Connect wallet'
- —No OpenAPI or output schema describing the response format
- —The specific meaning of '/trades/104' is unknown — could be a static resource ID or a placeholder
- —Cannot verify what data is actually returned on successful payment
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base network at maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/trades/104
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/104