USD/CAD forex rate via x402 micropayment on Base for $0.02 per request
What it does
This endpoint provides the USD/CAD foreign exchange rate through an x402-protocol pay-per-call API hosted at lowpaymentfee.com. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC uses 6 decimals). The endpoint accepts POST requests and returns JSON.
The provider, lowpaymentfee.com, offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per call. The x402 payment flow means no API keys or accounts are needed; callers attach an X-PAYMENT header with a signed USDC payment on Base. The 402 challenge confirms the endpoint is live and specifies the exact payment parameters including the payTo address and asset contract (USDC on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint name and path strongly suggest it returns a USD to CAD exchange rate, but the exact response format is unknown.
Capabilities
Use cases
- —Fetching the current USD/CAD exchange rate for financial applications
- —Integrating real-time forex data into trading bots or dashboards
- —Currency conversion calculations in payment or invoicing systems
Fit
Best for
- —Agents needing on-demand USD/CAD rates without API key management
- —Micropayment-friendly forex lookups on Base network
- —Lightweight, single-call currency rate checks
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Bulk historical forex data retrieval
- —Users who cannot transact in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/USDCAD \
-H "X-PAYMENT: <x402-signed-payment>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty. The listing is essentially a stub with only the x402 challenge and homepage catalog to go on.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content
- —No OpenAPI or request/response schema provided; response format is unknown
- —No examples of successful responses available
- —Provider offers many endpoints across diverse categories; quality and reliability of each is unverified
Citations
- —Endpoint returns HTTP 402 with x402 challenge specifying USDC on Base, maxAmountRequired 20000https://lowpaymentfee.com/api/v1/forex/USDCAD
- —All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/USDCAD