GBP/CAD forex rate via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides GBP/CAD foreign exchange rate data, accessible via the x402 payment protocol. It is part of a broader suite of APIs hosted at lowpaymentfee.com covering finance, analytics, AI/ML, crypto, and utility services. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals).
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 "exact" scheme — no API keys, accounts, or rate limits are required. The x402 challenge confirms the endpoint is live and specifies payment to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.
Documentation is extremely sparse. The landing page lists available endpoints and pricing but provides no request/response schema, parameter documentation, or usage examples. The /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional content. As a result, the exact request body format and response structure for the forex endpoint are unknown and must be discovered by calling the endpoint with payment.
Capabilities
Use cases
- —Fetching the current GBP/CAD exchange rate for trading or treasury applications
- —Integrating live forex data into automated financial workflows
- —Agent-driven currency conversion lookups without API key management
Fit
Best for
- —Developers needing pay-per-call forex data with no signup
- —AI agents that can settle x402 payments on Base
- —Low-volume or sporadic forex rate lookups where subscription pricing is wasteful
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk pricing
- —Users who need comprehensive multi-pair forex feeds in a single call
- —Anyone unable to pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPCAD \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is zero documentation on request parameters or response schema. The /docs and other pages are empty beyond a wallet connect prompt. The endpoint's actual behavior must be inferred entirely from its URL path.
Warnings
- —No request or response schema documented anywhere — input format is unknown
- —All documentation pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no useful content
- —No OpenAPI spec or AI plugin manifest available
- —The broader lowpaymentfee.com platform lists many endpoints but none have documented schemas
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC payment on Base network at 20000 base unitshttps://lowpaymentfee.com/api/v1/forex/GBPCAD
- —Site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/forex/GBPCAD
- —Documentation pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs