x402-gated HR document endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com serves an HR document resource (document ID 50) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, infrastructure utilities, and more — all settled on the Base network using USDC.
The specific endpoint `/api/v1/hr/documents/50` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.
The endpoint is live and returns a proper x402 challenge (version 1, scheme "exact"). However, the specific content and schema of the HR document response are not documented — the endpoint path suggests it retrieves a human-resources-related document by ID, but no further details about the response payload or accepted request body parameters are available. The platform provides no OpenAPI spec, no robots.txt, and no agents.txt. Documentation pages (/api, /pricing, /README) all resolve to a minimal "Connect wallet" prompt with no additional information.
Capabilities
Use cases
- —Retrieving HR-related documents on a per-request payment basis
- —Integrating pay-per-call document access into agent workflows
- —Demonstrating x402 protocol payment flows on Base
Fit
Best for
- —Agents needing on-demand document retrieval without API key management
- —Developers experimenting with x402 micropayment protocols
- —Use cases requiring low-cost, no-commitment document access
Not for
- —Bulk document retrieval where per-request fees add up quickly
- —Users who need detailed API documentation or response schemas before integrating
- —Applications requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/50 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation on request parameters, response schema, or what the HR document actually contains. No OpenAPI spec exists. The listing is essentially a stub with pricing and liveness confirmed but little else.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Response payload structure is completely unknown — no example or schema provided
- —The 'HR documents' category is not listed on the provider's landing page, raising questions about whether this is a production endpoint or a demo/test resource
- —Documentation pages (/api, /pricing, /README) return only a 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/hr/documents/50
- —The platform charges $0.02 per request with no API keys, no rate limits, and no minimumshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/hr/documents/50