Pay-per-call premium API access on Base via x402 — $0.02/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/transfers/197` accepts POST requests and charges 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02 per request. Payment is settled on-chain with no API keys, no rate limits, and instant access.
The broader lowpaymentfee.com platform offers a suite of pay-per-call APIs spanning 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 uniformly at $0.02 per request.
The specific functionality of the `/api/v1/transfers/197` endpoint is not documented beyond its title "Premium API Access." There is no OpenAPI spec, no request/response schema documentation, and the crawled docs/pricing/README pages only show a wallet-connect prompt. The endpoint is confirmed live (returns a valid 402 challenge), but what data or service it returns after payment is unclear.
Capabilities
Use cases
- —Programmatic access to a premium API resource without needing an API key or subscription
- —Agent-driven workflows that pay per call using on-chain USDC on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers experimenting with x402 payment flows
- —Agents that need keyless, pay-as-you-go API access
- —Users who prefer on-chain micropayments over traditional billing
Not for
- —Users who need detailed documentation or guaranteed SLAs
- —High-volume use cases where $0.02/request adds up without bulk discounts
- —Anyone requiring off-chain or fiat payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/197 \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge, but there is no documentation of what it actually returns, no OpenAPI spec, no request/response examples, and the crawled pages are mostly empty wallet-connect prompts. The specific purpose of '/transfers/197' is unknown.
Warnings
- —No documentation available for this specific endpoint's functionality or response format
- —Crawled docs, pricing, and README pages only display a wallet-connect prompt with no content
- —The purpose of '/api/v1/transfers/197' is unclear — 'Premium API Access' is generic
- —No OpenAPI schema or example responses available
Citations
- —Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/transfers/197
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transfers/197
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com