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 `/api/v1/trades/46` is listed as "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is handled via the x402 exact scheme — callers include an X-PAYMENT header with a signed payment to the provider's address, and the endpoint returns JSON.
The broader platform advertises four categories of APIs: 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 endpoints are listed at the same $0.02/request price point with no API keys, no rate limits, and no minimum commitments required.
The specific `/api/v1/trades/46` endpoint's purpose is not clearly documented beyond the generic "Premium API Access" label. It accepts POST requests and returns application/json. No OpenAPI schema, request body documentation, or response examples were found in the crawled material. The docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content, so the actual functionality behind this endpoint remains unclear.
Capabilities
Use cases
- —Accessing trade data or premium content via a single micropayment without needing an API key
- —Integrating pay-per-call endpoints into AI agent workflows using x402 protocol
- —Programmatic access to financial or trade-related data settled on Base L2
Fit
Best for
- —Developers wanting zero-signup, pay-per-request API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing well-documented API contracts with full OpenAPI specs
- —Applications requiring free or subscription-based access without crypto wallets
- —High-volume consumers who need bulk pricing or enterprise SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/46 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the /api/v1/trades/46 endpoint actually returns, no request/response schema, and the docs pages are empty. The 'Premium API Access' label is generic and uninformative.
Warnings
- —No OpenAPI or request/response schema available for this endpoint
- —Documentation pages (/docs, /pricing, /api, /README) all render only 'Connect wallet' with no content
- —The purpose and data returned by /api/v1/trades/46 is undocumented — 'Premium API Access' is a generic label
- —Cannot verify what this endpoint actually does without making a paid request
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/trades/46
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/trades/46
- —All endpoints listed at $0.02/request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categorieshttps://lowpaymentfee.com