GBP/JPY forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint provides the current GBP/JPY 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 covering 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 attach an X-PAYMENT header containing a signed USDC payment on Base (contract 0x8335…2913). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are needed — each call is independently settled on-chain.
The provider's landing page lists this endpoint under the "Finance & Web3" category alongside other market-data endpoints (price feeds, exchange rates, token quotes, gas estimates). Documentation beyond the landing page is sparse; the /docs, /pricing, and /README pages all render only a wallet-connect prompt with no additional technical detail. The exact response schema for the forex rate endpoint is not documented, so the response format below is inferred from the endpoint path and common conventions.
Capabilities
Use cases
- —Fetching the current GBP/JPY exchange rate for trading bots or dashboards
- —Programmatic currency conversion in financial applications
- —Agent-driven forex data retrieval with automatic micropayment settlement
- —Embedding live FX rates into spreadsheets or reports
Fit
Best for
- —AI agents needing on-demand forex data without API key management
- —Low-volume or bursty forex rate lookups where per-call pricing is economical
- —Developers prototyping financial tools who want instant access with no signup
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk rate plans
- —Historical forex time-series data (endpoint appears to serve current rates only)
- —Users who need detailed documentation or SLA guarantees before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPJPY/rate \
-H "X-PAYMENT: <x402-signed-payment>" \
-H "Content-Type: application/json"Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/forex/GBPJPY/rate",
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-signed-usdc-payment-on-base>",
"Content-Type": "application/json"
}
}Response
{
"pair": "GBP/JPY",
"rate": 193.452,
"source": "lowpaymentfee.com",
"timestamp": "2025-01-15T12:34:56Z"
}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 response format, and the docs/pricing/README pages are empty wallet-connect stubs. The response example is entirely inferred.
Warnings
- —No OpenAPI or response schema available — response format is inferred and may differ from actual output.
- —Documentation pages (/docs, /pricing, /README) render only a wallet-connect prompt with no technical content.
- —The provider hosts many diverse API categories (AI, analytics, finance, utils) all at the same price, which may indicate a generic wrapper rather than a specialized data source. Data provenance is unknown.
- —Forex rate data source and update frequency are not documented.
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/forex/GBPJPY/rate
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/forex/GBPJPY/rate
- —Provider lists forex/rate endpoints under Finance & Web3 category at $0.02/request with no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/GBPJPY/rate