Pay-per-request premium API access via x402 on Base network using USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" at the path /api/v1/customers/16, payable per-request via the x402 protocol on the Base network using USDC (USD Coin). The x402 challenge indicates a maximum payment of 20,000 units of the USDC token (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which at 6 decimals equals $0.02 per request.
The broader lowpaymentfee.com platform advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints share the same $0.02/request pricing model with no API keys, no rate limits, and instant access. The specific /api/v1/customers/16 endpoint appears to be a customer data resource, though its exact response schema is not documented in the available crawl material.
Payment is settled on the Base L2 network using the "exact" scheme, meaning the caller must include an X-PAYMENT header with a valid payment proof for the specified amount. The endpoint accepts POST requests and returns application/json responses. Documentation pages on the site are minimal, showing only a "Connect wallet" prompt without detailed API reference material.
Capabilities
Use cases
- —Accessing customer data records without traditional API key registration
- —Programmatic pay-per-use data retrieval settled on Base L2
- —Agent-driven data queries with instant USDC micropayments
Fit
Best for
- —Developers wanting keyless API access with crypto micropayments
- —AI agents that can settle x402 payments autonomously
- —Users who prefer pay-as-you-go without subscriptions or rate limits
Not for
- —Users without USDC on Base network
- —High-volume batch jobs where $0.02/request adds up significantly
- —Anyone needing detailed documentation or guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/16 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear, but there is no documentation of request/response schemas, no OpenAPI spec, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The specific purpose of /api/v1/customers/16 is unclear.
Warnings
- —No API documentation available — docs, pricing, and README pages only show 'Connect wallet'
- —Response schema for /api/v1/customers/16 is completely undocumented
- —The purpose of a 'customers/16' endpoint is ambiguous — could be demo/test data
- —No OpenAPI or machine-readable schema provided
Citations
- —x402 challenge returns 402 with maxAmountRequired of 20000 USDC on Base networkhttps://lowpaymentfee.com/api/v1/customers/16
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/customers/16
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/customers/16