Pay-per-call customer data API on Base via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com hosts a collection of pay-per-request APIs accessible via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/customers/10` is described as "Premium API Access" and returns JSON. Payment is settled in USDC (contract 0x8335…2913 on Base) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.
The broader lowpaymentfee.com platform advertises endpoints across four categories: 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 are listed at the same $0.02/request price point.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific behavior of the `/api/v1/customers/10` endpoint (what customer data it returns, what POST body it expects) is unknown from the available sources.
Capabilities
Use cases
- —Retrieving customer data records on a pay-per-call basis without subscription commitments
- —Agent-driven workflows that need on-demand data access settled in USDC on Base
- —Prototyping integrations where per-request billing avoids upfront API key provisioning
Fit
Best for
- —Developers or agents wanting zero-commitment, per-call API access
- —x402-compatible clients on the Base network
- —Use cases requiring small, infrequent data lookups without subscription overhead
Not for
- —High-volume bulk data retrieval where per-call pricing becomes expensive
- —Users who need detailed API documentation or guaranteed SLAs
- —Callers without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/10 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the purpose of the /customers/10 endpoint is undocumented. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown
- —All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content
- —The specific purpose and data returned by /api/v1/customers/10 is not documented anywhere in the crawled material
- —Cannot verify what 'Premium API Access' actually provides beyond the generic label
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/customers/10
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/customers/10
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com