x402-gated employee salary endpoint on Base, paying $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com exposes an employee salary resource at `/api/v1/employees/143/salary` behind an x402 payment challenge. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint returns salary data for employee ID 143 via HTTP POST. The x402 challenge advertises a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are required; access is granted purely through the x402 payment header.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the salary response contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know exactly what data is returned or what POST body (if any) is expected.
Capabilities
Use cases
- —Retrieving salary information for a specific employee record
- —Integrating pay-per-call employee data into payroll or HR workflows
- —Demonstrating x402 micropayment-gated API access on Base
Fit
Best for
- —Developers experimenting with x402 payment protocols
- —Agents needing on-demand employee salary data without API key management
- —Micropayment-based data access without subscriptions
Not for
- —Bulk payroll data exports (single-employee endpoint, $0.02 each)
- —Users who need detailed API documentation or schema guarantees before integrating
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/employees/143/salary \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation: no OpenAPI schema, no request/response examples, no field descriptions. The docs pages are empty ("Connect wallet" only). The endpoint path and description ("Premium API Access") are generic and the actual salary data structure is unknown.
Warnings
- —No OpenAPI schema or request/response documentation available
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —Unknown POST body requirements — unclear if a request body is needed or what fields are returned
- —The endpoint path references a hardcoded employee ID (143); unclear if other IDs are supported or how to discover them
- —The site appears to be a demo or showcase platform; data authenticity is unverified
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/employees/143/salary
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/employees/143/salary