Pay-per-call customer data API on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to a customer resource (`/api/v1/customers/42`) using the x402 payment protocol. It is part of a broader platform offering dozens of pay-per-request endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.
Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The x402 challenge confirms the endpoint is live, accepting POST requests with an `X-PAYMENT` header. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys, rate limits, or upfront commitments are required — callers simply attach a valid x402 payment header to each request.
The specific `/customers/42` resource likely returns JSON customer data, though no detailed schema or example response is documented. The platform's docs, pricing, and README pages all resolve to a "Connect wallet" prompt with no additional technical documentation. This makes it difficult to know exactly what fields the response contains or what POST body (if any) is expected. The endpoint is confirmed live via the 402 challenge, but the lack of documentation limits confidence in integration details.
Capabilities
Use cases
- —Retrieving customer records on a per-request payment basis without API key management
- —Integrating pay-as-you-go data access into agent workflows via x402
- —Accessing structured customer data with crypto-native micropayments
Fit
Best for
- —Agents or apps that need on-demand customer data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs on Base
- —Crypto-native workflows that can attach USDC payments per call
Not for
- —High-volume bulk data retrieval where per-request pricing becomes expensive
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Non-crypto users who cannot generate x402 payment headers
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/42 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs/pricing/README pages all resolve to empty 'Connect wallet' prompts. The specific purpose of the /customers/42 resource is unclear beyond the generic 'Premium API Access' label.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
- —No request or response schema documented for this endpoint
- —The specific data returned by /api/v1/customers/42 is unknown
- —No OpenAPI or ai-plugin manifest found
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/customers/42
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/customers/42
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com