x402-gated premium API endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/ehr/79` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. The specific `/api/v1/ehr/79` path is labeled "Premium API Access" but its exact functionality is not documented on the provider's site — the "ehr" path segment suggests it may relate to Electronic Health Records or a similar domain, but this is unconfirmed.
The endpoint is live and returns a valid x402 payment challenge. It accepts POST requests and settles payments in USDC on the Base network. The maximum amount required per request is 20,000 base units of USDC (6 decimals), which equals $0.02 USD — consistent with the platform's uniform $0.02/request pricing across all listed endpoints. No API keys are required; access is granted purely through the x402 payment protocol. The platform advertises no rate limits and instant access.
Documentation is extremely sparse. The provider's docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data this endpoint actually returns. The endpoint's purpose must be treated as uncertain until the provider publishes proper documentation.
Capabilities
Use cases
- —Accessing premium data behind an x402 paywall without API key management
- —Agent-driven pay-per-request data retrieval on Base network
- —Programmatic access to an EHR-like resource (unconfirmed purpose)
Fit
Best for
- —Developers wanting keyless, pay-per-call API access
- —AI agents with x402 payment capability on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Anyone needing well-documented, production-grade EHR integrations with compliance guarantees
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/79 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ehr/79 actually does, no request/response schema, and no examples. The crawled docs/pricing/README pages are all blank beyond a wallet-connect prompt. The endpoint's purpose is essentially unknown.
Warnings
- —The exact purpose and data returned by /api/v1/ehr/79 are undocumented and unknown.
- —The 'ehr' path segment may imply health data, which could fall under regulated categories (HIPAA, etc.) — no compliance information is provided.
- —All documentation pages (docs, API, pricing, README) returned no useful content beyond 'Connect wallet'.
- —No OpenAPI schema, request format, or response examples are available.
- —This endpoint is not listed among the provider's publicly advertised APIs on the homepage.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ehr/79
- —The platform advertises $0.02/request pricing, no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/ehr/79
- —Documentation pages render only a 'Connect wallet' prompt with no substantive contenthttps://lowpaymentfee.com/docs