Pay-per-call HR document endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at `/api/v1/hr/documents/9` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. Each call is settled on the Base network using USDC with no API keys, no rate limits, and no subscriptions — just a per-request micropayment of $0.02.
The specific endpoint probed (`/api/v1/hr/documents/9`) appears to serve an HR-related document resource. The x402 challenge confirms it is live, accepting POST requests and returning `application/json`. Payment is made via the x402 "exact" scheme to a designated wallet address on Base, with USDC (contract `0x8335…2913`) as the settlement asset. The max amount required is 20,000 base units, which at 6 decimals equals $0.02.
The broader lowpaymentfee.com platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 per request price point. No OpenAPI schema or detailed documentation was found beyond the landing page listings, so the exact request/response shapes for this HR documents endpoint are unknown.
Capabilities
Use cases
- —Retrieving HR document data on a per-request payment basis
- —Integrating pay-per-call document access into agent workflows
- —Accessing structured HR records without API key management
Fit
Best for
- —Agents needing on-demand HR document retrieval with no subscription
- —Developers exploring x402 micropayment-based API access
- —Use cases where per-call billing is preferred over monthly plans
Not for
- —Bulk document retrieval requiring thousands of calls (no volume discounts documented)
- —Users who need detailed API documentation or OpenAPI specs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/9 \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no documentation of request/response formats, and the HR documents endpoint purpose is only vaguely implied by its URL path. The crawl pages beyond the landing page returned only 'Connect wallet' with no useful content.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Request body format and response structure are completely unknown
- —The endpoint path '/api/v1/hr/documents/9' suggests a specific document resource but no HR-related category appears on the provider's landing page, raising questions about what this endpoint actually returns
- —No robots.txt or agents.txt found
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/hr/documents/9
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/hr/documents/9