x402-gated premium API endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at `/api/v1/ehr/38` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request 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 0x8335…2913) via the x402 exact payment scheme.
The x402 challenge advertises a `maxAmountRequired` of 20000 base units. USDC uses 6 decimals, so this translates to $0.02 per request — consistent with the site-wide pricing of $0.02/request shown on the landing page. The platform advertises no API keys, no rate limits, and instant access. However, the specific functionality behind `/api/v1/ehr/38` is not documented anywhere in the crawled material. The path segment "ehr" could suggest electronic health records or similar domain data, but this is speculative. No input schema, output schema details, or usage examples are provided beyond the basic x402 challenge metadata.
The endpoint is live and returning a valid 402 challenge. Documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior 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 network
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users comfortable with USDC payments on Base L2
- —Low-volume or sporadic API consumers who prefer no subscriptions
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone requiring non-crypto payment methods
- —High-volume consumers who need bulk pricing or rate guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/38 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, the specific functionality of /api/v1/ehr/38 is completely undocumented — no input/output schema, no examples, and all documentation pages are empty. The listing is essentially a stub with only payment metadata.
Warnings
- —The specific purpose and data returned by /api/v1/ehr/38 are unknown — 'ehr' is not explained anywhere in available docs.
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content.
- —If 'ehr' refers to electronic health records, this may involve regulated health data (HIPAA, etc.) — verify compliance before use.
- —No input schema or output schema is documented beyond the x402 challenge envelope.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.https://lowpaymentfee.com/api/v1/ehr/38
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/ehr/38