Pay-per-call employee salary lookup API on Base via x402, settled in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to employee salary data via a POST request to `/api/v1/employees/122/salary`. 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 gated by the x402 payment protocol on the Base network.
The endpoint returns a 402 challenge requiring payment in USDC (contract `0x8335...2913` on Base) with a maximum amount of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-call micropayment.
Documentation is extremely sparse. The landing page lists available endpoints and pricing, but the `/docs`, `/api`, `/pricing`, and `/README` routes all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads. The specific endpoint probed (`/employees/122/salary`) is not listed on the homepage among the advertised APIs, which raises questions about whether it is a demo/test route or a production resource. The response MIME type is declared as `application/json`.
Capabilities
Use cases
- —Retrieving employee salary information on a per-request payment basis
- —Integrating pay-per-call salary data into HR or payroll workflows
- —Agent-driven data retrieval without API key management
Fit
Best for
- —Developers wanting zero-signup, pay-per-call access to data endpoints
- —AI agents that can settle x402 micropayments on Base
- —Prototyping x402 payment flows with low-cost endpoints
Not for
- —Bulk payroll data exports requiring thousands of records at once
- —Users who need detailed API documentation or SDKs before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/employees/122/salary \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but documentation is essentially nonexistent — no OpenAPI spec, no request/response schemas, no examples. The specific employee salary endpoint is not listed among the provider's advertised APIs, making its purpose and data source unclear. Score reflects a working payment gate with minimal supporting information.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /employees/122/salary path is not listed among the provider's advertised APIs on the homepage
- —All documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no content
- —Request and response body schemas are completely unknown
- —Data source and accuracy of employee salary information is unverified
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/employees/122/salary
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/employees/122/salary