x402-gated premium API endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/ehr/78` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. The specific endpoint is labeled "Premium API Access" and accepts HTTP POST requests, returning JSON responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact-payment scheme.
The x402 challenge indicates a maximum required amount of 20,000 base units of USDC. Since USDC uses 6 decimals, this converts to $0.02 per request, consistent with the site-wide pricing of $0.02/request advertised on the landing page. The platform advertises no API keys, no rate limits, and instant access — payment is the only authentication mechanism.
Important caveat: the `/api/v1/ehr/78` path is not listed among the publicly documented endpoints on the landing page, and no documentation describes what "EHR" stands for or what data this endpoint returns. The crawled docs, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional content. Without an OpenAPI schema, request/response examples, or any description of the endpoint's functionality beyond its title, the actual purpose and data returned by this endpoint remain unknown.
Capabilities
Use cases
- —Accessing premium data behind a per-request USDC paywall
- —Agent-driven API consumption without API keys or subscriptions
- —Programmatic pay-as-you-go data retrieval on Base L2
Fit
Best for
- —Developers wanting keyless, pay-per-call API access
- —AI agents with x402-compatible payment capabilities
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Anyone needing detailed documentation or known response schemas before integrating
- —Use cases requiring free or trial access to evaluate the endpoint
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/78 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, the specific /api/v1/ehr/78 path is not documented anywhere on the site, there is no OpenAPI schema, no request/response examples, and no description of what data the endpoint actually returns. Docs pages render only a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —The /api/v1/ehr/78 endpoint is not listed among the publicly documented APIs on the landing page — its purpose is unknown.
- —'EHR' may refer to Electronic Health Records, which could involve regulated health data (HIPAA, etc.). Exercise caution.
- —No OpenAPI schema, request body format, or response examples are available.
- —All documentation pages (docs, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/ehr/78
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/ehr/78
- —The /api/v1/ehr/78 path is not among the endpoints listed on the landing pagehttps://lowpaymentfee.com