CAD/CHF forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint provides the CAD/CHF (Canadian Dollar to Swiss Franc) foreign exchange rate, accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC, with no API keys, rate limits, or subscriptions required — you pay per call using an on-chain micropayment.
The endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning finance, data analytics, AI/ML inference, crypto market data, and utility services, all priced at $0.02 per request. The forex rate endpoint specifically serves the CAD/CHF currency pair. The x402 challenge confirms the endpoint is live, accepts POST requests, and settles payments in USDC (contract 0x8335…2913) on the Base L2 network.
Documentation beyond the landing page is sparse — the /docs, /pricing, and /api pages all render only a wallet-connect prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint likely returns a JSON object with the current exchange rate, but the exact schema is unconfirmed.
Capabilities
Use cases
- —Fetching real-time CAD/CHF exchange rates for trading applications
- —Integrating forex data into financial dashboards without API key management
- —Agent-driven currency conversion workflows that pay per call on-chain
- —Building cross-currency pricing tools that need CAD to CHF conversion
Fit
Best for
- —Developers needing on-demand CAD/CHF rates without subscription commitments
- —AI agents that can settle x402 micropayments on Base
- —Applications requiring keyless, pay-per-use forex data
Not for
- —High-frequency trading requiring sub-millisecond latency (on-chain payment adds overhead)
- —Users needing historical forex time-series data (only current rate is indicated)
- —Consumers who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/CADCHF/rate \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) with clear pricing ($0.02 USDC on Base), but there is no OpenAPI schema, no documented request/response format, and all doc pages render only a wallet-connect prompt. The response shape must be inferred.
Warnings
- —No OpenAPI or JSON schema available for request or response payloads
- —Documentation pages (/docs, /pricing, /api, /README) contain no usable content — only a wallet-connect prompt
- —Response format for the forex rate endpoint is unconfirmed; no example responses available
- —The specific data source for the CAD/CHF rate is unknown
Citations
- —Endpoint returns HTTP 402 with x402 challenge, confirming it is live on the Base networkhttps://lowpaymentfee.com/api/v1/forex/CADCHF/rate
- —Price is $0.02 per request (maxAmountRequired 20000 in USDC with 6 decimals = $0.02)https://lowpaymentfee.com/api/v1/forex/CADCHF/rate
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/CADCHF/rate
- —Site advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com