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 on the Base network. The specific resource `/api/v1/trades/103` appears to be part of a broader platform offering data & analytics, AI/ML inference, finance/Web3 data, and infrastructure utility endpoints — all gated behind per-request USDC micropayments at $0.02 each.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). 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 specific `/api/v1/trades/103` path suggests a trades-related resource (possibly returning trade data for item/asset ID 103), but no documentation or schema details are available for this particular endpoint. The broader site lists categories like analytics metrics, AI sentiment analysis, text summarization, price feeds, exchange rates, geocoding, and more — all at the same $0.02 price point. Without detailed docs or response schemas, the exact payload structure for this trades endpoint remains unclear.
Capabilities
Use cases
- —Fetching trade data for a specific asset or item via a single paid request
- —Programmatic access to trade information without subscription or API key management
- —Agent-driven data retrieval with automatic USDC micropayment on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents that can settle x402 payments autonomously
- —Users who need occasional trade data without committing to a subscription
Not for
- —High-volume consumers needing bulk/discounted pricing
- —Users who need detailed API documentation or response schema guarantees before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/103 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no response examples, no documentation for the /trades/103 path specifically, and the crawled docs/pricing/README pages all returned only 'Connect wallet' with no useful content. The purpose of this specific trades endpoint is unclear.
Warnings
- —No documentation available for the /api/v1/trades/103 endpoint — its request body and response schema are unknown
- —All doc, pricing, and README pages returned only 'Connect wallet' with no substantive content
- —The /api/v1/trades/103 path is not listed among the advertised endpoints on the homepage, making its purpose unclear
- —No OpenAPI spec or output schema beyond basic HTTP method info
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/trades/103
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/trades/103
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com