x402-gated premium API endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/ehr/97` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific endpoint is labeled "Premium API Access" and accepts POST requests, returning JSON responses. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) via the x402 exact-payment scheme.
The maximum amount required per call is 20,000 base units of USDC. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's advertised flat pricing of $0.02/request across all endpoints. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The specific purpose of `/api/v1/ehr/97` is unclear from available documentation. The path segment "ehr" could suggest electronic health records or another domain-specific resource, but no schema, field descriptions, or example payloads are documented. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional technical content. Without request/response schemas or usage examples, callers will need to experiment or contact the provider to understand what this endpoint actually returns.
Capabilities
Use cases
- —Accessing premium data behind a per-request paywall without API keys
- —Programmatic pay-per-call access from AI agents using x402 protocol
- —Integrating micropayment-gated endpoints into automated workflows
Fit
Best for
- —Developers experimenting with x402 pay-per-request protocols
- —AI agents that can settle USDC payments on Base
- —Users who want keyless, commitment-free API access
Not for
- —Anyone needing well-documented API contracts with clear request/response schemas
- —Use cases requiring free or subscription-based access patterns
- —Production systems that need guaranteed SLAs and support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/97 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation of what this endpoint actually does, no request/response schema, no examples, and the docs pages are empty. The 'ehr/97' path is unexplained, making this effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no technical content.
- —The purpose of /api/v1/ehr/97 is unknown; the 'ehr' path segment is not explained anywhere in crawled material.
- —No request or response schema is provided; callers cannot know what to send or what to expect back.
- —This endpoint is not listed among the advertised APIs on the homepage, raising questions about its intended use.
- —If 'ehr' refers to electronic health records, this may involve regulated health data — exercise caution.
Citations
- —Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/ehr/97
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/ehr/97