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 12) 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/12` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 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 well-formed x402 version 1 challenge. However, no OpenAPI schema, request/response examples, or detailed documentation is available for this specific HR documents endpoint. The broader site lists many endpoint categories but provides no further detail on what the HR documents API returns or what input it expects beyond a POST body. The "HR documents" category itself does not appear on the landing page's public listing, making this endpoint's purpose somewhat opaque.
Capabilities
Use cases
- —Retrieving HR document data via a micropayment-gated API call
- —Integrating pay-per-request document access into agent workflows
- —Accessing premium content without traditional API key provisioning
Fit
Best for
- —Agents needing on-demand document retrieval with crypto micropayments
- —Developers exploring x402 protocol integrations on Base
- —Use cases where keyless, pay-as-you-go API access is preferred
Not for
- —Bulk document retrieval at scale (no documented batch support)
- —Users who need detailed API documentation or schema guarantees before integrating
- —Non-crypto payment workflows (only USDC on Base is accepted)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/12 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation explaining what the HR documents endpoint actually returns or what input it expects. The endpoint category (HR documents) is not even listed on the provider's public landing page, making its purpose unclear.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/hr/documents/ path is not listed among the provider's publicly advertised API categories
- —No request body schema or response examples are documented anywhere
- —The broader site's /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content
Citations
- —The platform charges $0.02 per request with no API keys, no rate limits, and no minimumshttps://lowpaymentfee.com
- —The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/hr/documents/12
- —The endpoint accepts POST requests and returns application/jsonhttps://lowpaymentfee.com/api/v1/hr/documents/12