x402-gated premium API endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at `/api/v1/ehr/34` 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 listed here is labeled "Premium API Access" and is gated behind an x402 payment challenge requiring USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme with no API keys, no rate limits, and no subscriptions required.
The broader lowpaymentfee.com platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, the specific endpoint `/api/v1/ehr/34` does not clearly map to any of the documented categories on the landing page. The "ehr" path segment suggests electronic health records or a similar domain, but no documentation or schema is available to confirm what data this endpoint returns. The output schema only specifies that it accepts HTTP POST and returns `application/json`.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material.
Capabilities
Use cases
- —Accessing premium data behind a per-request paywall without needing API keys or subscriptions
- —Programmatic agent-driven data retrieval with automatic USDC micropayments on Base
- —Integrating pay-as-you-go API calls into workflows that settle on-chain
Fit
Best for
- —Agents or developers who want keyless, pay-per-call API access
- —Users already holding USDC on the Base network
- —Scenarios requiring low-friction, no-commitment API consumption
Not for
- —Users who need detailed API documentation or request/response schemas before integrating
- —Anyone looking for free or subscription-based access
- —Use cases requiring guaranteed SLAs or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, confirming it is operational. However, there is no documentation, no request/response schema, no examples, and the specific endpoint path (/api/v1/ehr/34) is not explained anywhere on the site. The listing is effectively a stub with only pricing and protocol details available.
Warnings
- —The endpoint path '/api/v1/ehr/34' is not listed among the documented APIs on the landing page — its purpose is unclear.
- —'ehr' may refer to electronic health records, which could involve regulated health data; exercise caution.
- —No request body schema or response schema is documented anywhere.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content.
- —No OpenAPI spec or usage examples are available.
Citations
- —The endpoint returns a 402 x402 challenge requiring USDC on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/ehr/34
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/ehr/34
- —Docs, API, pricing, and README pages show only 'Connect wallet' with no substantive documentationhttps://lowpaymentfee.com/docs