x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific path `/api/v1/ehr/65` is listed under the provider's catalog, though its exact functionality is not documented in the available crawl material. The provider hosts a broad suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments at $0.02 per request in USDC.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913) on Base. The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02. No API keys, rate limits, or commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Note: The specific `/api/v1/ehr/65` path suggests an Electronic Health Record (EHR) resource, but no documentation describes its input schema, expected fields, or response format. The provider's landing page does not list this particular endpoint among its advertised categories. Callers should treat this as an undocumented endpoint and exercise caution regarding the nature and sensitivity of any data returned.
Capabilities
Use cases
- —Accessing premium data behind an x402 paywall without managing API keys
- —Programmatic retrieval of EHR-related data (if the endpoint serves health records)
- —Agent-driven micropayment workflows on Base using USDC
Fit
Best for
- —Developers experimenting with x402 micropayment protocols
- —Agents that can autonomously settle USDC payments on Base
- —Use cases requiring keyless, pay-per-call API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Applications requiring HIPAA-compliant, audited health data pipelines (compliance status unknown)
- —High-volume batch processing where per-request fees add up
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ehr/65 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific /api/v1/ehr/65 endpoint is completely undocumented — no input schema, no response examples, no description of what data it returns. The provider's docs, pricing, and README pages all render only a 'Connect wallet' prompt with no useful content.
Warnings
- —The /api/v1/ehr/65 path is not listed among the provider's advertised API categories — its purpose is unknown.
- —EHR (Electronic Health Record) data may be subject to HIPAA or other health-data regulations; compliance status is undocumented.
- —No input schema, output schema, or example responses are available for this endpoint.
- —Provider documentation pages (/docs, /pricing, /README, /api) returned no meaningful content beyond 'Connect wallet'.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02 per request.https://lowpaymentfee.com/api/v1/ehr/65
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/ehr/65
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.https://lowpaymentfee.com/api/v1/ehr/65