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/11` accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equals $0.02 per request. Payment is handled inline via the X-PAYMENT header with no API keys or rate limits required.
The broader lowpaymentfee.com platform offers 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 uniformly at $0.02 per request.
The specific functionality of the `/api/v1/transfers/11` endpoint is not documented beyond the generic "Premium API Access" label. No request/response schema, parameter documentation, or example payloads are available from the crawled material. The endpoint is live and returns a valid x402 challenge, settling payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).
Capabilities
Use cases
- —Accessing premium API services without traditional API key registration
- —Making one-off API calls with instant USDC micropayments on Base
- —Integrating pay-per-use endpoints into autonomous agent workflows
Fit
Best for
- —Developers who want instant API access without signup or subscriptions
- —AI agents that need permissionless, pay-as-you-go API consumption
- —Users already holding USDC on Base network
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Developers without access to USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation on what the /transfers/11 endpoint actually does, no request/response schema, and no examples. The 'Premium API Access' label is entirely generic. Docs, pricing, and README pages all just show 'Connect wallet' with no useful content.
Warnings
- —The specific functionality of /api/v1/transfers/11 is undocumented — 'Premium API Access' is a generic label with no detail on inputs or outputs.
- —Documentation pages (/docs, /api, /pricing, /README) returned no meaningful content beyond 'Connect wallet'.
- —No OpenAPI spec, no request/response schema, and no example payloads are available.
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/transfers/11
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transfers/11