Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific endpoint `/api/v1/transfers/180` is one of many API endpoints offered by this provider, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.
The provider advertises a flat $0.02 per request pricing model with no API keys, no rate limits, and instant access. Payment is settled in USDC on the Base network. The x402 challenge confirms the endpoint is live, accepting POST requests with a maximum amount of 20,000 base units of USDC (which equals $0.02 given USDC's 6 decimals). The payment address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` and the USDC contract on Base is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`.
However, the specific functionality of the `/api/v1/transfers/180` endpoint is unclear. The provider's landing page lists various API categories but does not explicitly list a "transfers" endpoint. No OpenAPI schema, detailed documentation, or example responses are available — the docs, pricing, and README pages all render only a "Connect wallet" prompt. The actual behavior and response format of this particular endpoint remain undocumented.
Capabilities
Use cases
- —Programmatic access to premium data or services without subscription commitments
- —Agent-driven workflows that need instant API access without key provisioning
- —Micropayment-gated API calls settled on Base L2
Fit
Best for
- —Developers wanting zero-friction API access without signup
- —AI agents that can settle x402 payments autonomously
- —Users who prefer pay-as-you-go over subscription models
Not for
- —Users needing detailed API documentation before integrating
- —High-volume use cases where per-request pricing may add up
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/180 \
-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, no OpenAPI schema, no example requests/responses, and the specific purpose of /api/v1/transfers/180 is undocumented. The docs pages are empty beyond a wallet-connect prompt.
Warnings
- —The specific functionality of /api/v1/transfers/180 is not documented anywhere on the provider's site
- —No OpenAPI schema or response examples available
- —Documentation pages (docs, pricing, README) render only 'Connect wallet' with no useful content
- —The 'transfers' path does not appear in the provider's listed API categories
Citations
- —Flat pricing of $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/transfers/180
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transfers/180