x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402 protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/trades/170` is listed as "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys or rate limits are required; callers simply attach an x402 payment header to each request.
The broader platform advertises four categories of endpoints: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All listed endpoints share the same $0.02/request pricing.
The specific `/api/v1/trades/170` endpoint's purpose is unclear from the available documentation — it falls under a "trades" path that is not explicitly listed on the homepage. The endpoint accepts POST requests and returns `application/json`. Documentation pages beyond the landing page were effectively empty (showing only "Connect wallet"), so detailed request/response schemas, parameter descriptions, and example payloads are unavailable.
Capabilities
Use cases
- —Accessing trade data or executing trade-related operations via a single paid API call
- —Integrating pay-per-use API access into autonomous agents without managing API keys
- —Programmatic access to financial or trade information settled on-chain
Fit
Best for
- —Agents or developers wanting keyless, pay-per-call API access
- —Use cases requiring on-chain payment settlement on Base
- —Low-volume or sporadic API consumers who prefer no subscriptions
Not for
- —High-volume consumers needing bulk pricing or subscription discounts
- —Users who need detailed API documentation and schemas before integrating
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/170 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for the /trades/170 path specifically, no request/response schema, and all doc pages beyond the homepage are empty. The endpoint's actual functionality is unknown.
Warnings
- —The /api/v1/trades/170 path is not listed among the homepage's advertised endpoints — its purpose is unclear.
- —All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no usable content.
- —No request or response schema is available; callers cannot know what parameters to send or what data to expect.
- —The endpoint's actual behavior and data returned are entirely undocumented.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/trades/170
- —All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/170