x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.
What it does
This endpoint at lowpaymentfee.com provides a collection of pay-per-request APIs gated via the x402 protocol on the Base network. The specific endpoint `/api/v1/trades/64` is listed as "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, with a maximum amount of 20,000 base units — which at 6 decimals equals $0.02 per call.
The broader lowpaymentfee.com platform advertises multiple API categories including 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 priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
However, the specific `/api/v1/trades/64` endpoint does not appear in the site's publicly listed API catalog, and no documentation describes what data or functionality it returns. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. Without schema details or example responses, the actual behavior of this particular endpoint remains unclear.
Capabilities
Use cases
- —Accessing trade-related data via a single micropayment per request
- —Integrating pay-per-use API calls into autonomous agent workflows
- —Consuming premium data without managing API keys or subscriptions
Fit
Best for
- —Agents or developers who want keyless, pay-per-request API access
- —x402-compatible wallets and clients on Base
- —Low-volume or sporadic API consumers who prefer no commitments
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/64 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, the specific /api/v1/trades/64 path is not documented anywhere on the site, there is no OpenAPI schema, no example request/response, and all documentation pages render only a wallet-connect prompt. The actual functionality of this endpoint is unknown.
Warnings
- —The /api/v1/trades/64 endpoint is not listed in the site's public API catalog — its purpose and response format are undocumented.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.
- —No OpenAPI spec, no request/response schema, and no example payloads are available.
- —The endpoint's actual data or functionality cannot be verified without making a paid request.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 in USDC (6 decimals) on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/trades/64
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/trades/64
- —The site lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure.https://lowpaymentfee.com