GBP/CAD forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint returns the current GBP/CAD foreign exchange rate, accessible via the x402 payment protocol on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com spanning finance, analytics, AI/ML, crypto, and utility services, all priced at $0.02 per request paid in USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, accounts, or rate limits are advertised — access is purely pay-per-call.
Documentation is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /pricing, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the forex rate response contains. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format must be inferred.
Capabilities
Use cases
- —Fetching the current GBP/CAD exchange rate for trading or treasury applications
- —Integrating live forex data into financial dashboards without API key management
- —Agent-driven currency conversion where per-call micropayments replace subscriptions
Fit
Best for
- —Developers needing GBP/CAD rates without signup or API keys
- —AI agents that can pay per request via x402 on Base
- —Low-volume or sporadic forex data consumers who want no commitments
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk pricing
- —Users who need historical forex data or OHLC candles (not advertised)
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPCAD/rate \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty beyond a wallet-connect prompt. The listing is essentially a stub with verified liveness.
Warnings
- —No API documentation available — /docs, /pricing, and /README pages are empty
- —No request or response schema provided; actual output format is unknown
- —The provider hosts many generic-sounding endpoints (analytics, AI, crypto, utils) all at the same price, which may indicate placeholder or thin services
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base, maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/forex/GBPCAD/rate
- —All APIs priced at $0.02 per request 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/forex/GBPCAD/rate