x402-gated EHR endpoint on Base, pay-per-request with USDC — no API keys required.
What it does
This endpoint at `/api/v1/ehr/58` is part of the lowpaymentfee.com platform, which offers a collection of x402 protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance, and infrastructure utilities. The specific endpoint listed here appears to serve electronic health record (EHR) data, though the crawled documentation provides no details about the `/ehr/` path's schema, input parameters, or response format. The platform advertises a flat $0.02 per request across its catalog, and the x402 challenge confirms a `maxAmountRequired` of 20,000 base units of USDC (0x8335…) on Base network, which equals $0.02 given USDC's 6 decimals.
The platform's value proposition is zero-friction API access: no API keys, no rate limits, no accounts. Payment is handled entirely via the x402 protocol — callers attach an `X-PAYMENT` header with a signed USDC payment on Base, and the endpoint returns the response. The x402 challenge specifies the `exact` scheme with a 300-second timeout.
Documentation is extremely sparse. The `/docs`, `/pricing`, `/api`, and `/README` pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no explanation of what the `/ehr/58` endpoint actually returns or what inputs it expects. The `58` in the path may be a record identifier, but this is purely speculative. Potential users should be aware that EHR data may be subject to healthcare privacy regulations (e.g., HIPAA in the US), and the provenance and compliance status of data served by this endpoint is entirely unknown.
Capabilities
Use cases
- —Retrieving electronic health record data on a per-request basis
- —Integrating EHR data into agent workflows without managing API keys
- —Programmatic access to health record information via crypto micropayments
Fit
Best for
- —Developers wanting frictionless pay-per-call access to EHR data
- —AI agents that can settle x402 payments on Base with USDC
- —Prototyping health data integrations without subscription commitments
Not for
- —Production healthcare applications requiring HIPAA-compliant, audited data pipelines
- —Users who need detailed API documentation and guaranteed SLAs
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/58 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the /ehr/58 endpoint accepts or returns. No OpenAPI spec, no examples, no schema. The EHR domain raises regulatory concerns that are unaddressed.
Warnings
- —No documentation exists for the /ehr/ path — input parameters and response schema are completely unknown.
- —EHR (Electronic Health Record) data may be subject to healthcare privacy regulations such as HIPAA; compliance status is unknown.
- —All documentation pages (/docs, /pricing, /api, /README) returned only a 'Connect wallet' prompt with no content.
- —The /ehr/58 path is not listed among the provider's advertised API catalog on the homepage, raising questions about its provenance.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network with a 300-second timeouthttps://lowpaymentfee.com/api/v1/ehr/58
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/ehr/58