EUR/GBP forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint returns the current EUR/GBP foreign exchange rate, accessible via the x402 payment protocol on the Base network. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, which spans finance, analytics, AI, crypto, and utility categories. Each request costs $0.02 (20,000 base units of USDC on Base, with 6 decimals), settled on-chain with no API keys, no rate limits, and no upfront commitments.
The endpoint accepts POST requests and returns JSON. The specific response schema is not documented — the provider's docs, pricing, and README pages all render only a wallet-connect prompt with no further technical detail. Based on the URL pattern (`/api/v1/forex/EURGBP/rate`) and the site's description of its finance endpoints as "Market data and financial calculations," the response likely contains the current EUR/GBP spot rate, though the exact fields are unconfirmed.
The x402 challenge was successfully captured (HTTP 402 with a valid accepts block), confirming the endpoint is live. Payment is made in USDC (contract 0x8335…2913) on Base mainnet to address 0x1A2B…85F3, with a max timeout of 300 seconds. No OpenAPI spec or detailed documentation is available beyond the landing page.
Capabilities
Use cases
- —Fetching the current EUR/GBP exchange rate for trading bots or portfolio dashboards
- —Programmatic currency conversion in fintech applications
- —Agent-driven forex data retrieval without API key management
- —On-demand FX rate lookups for cross-border payment calculations
Fit
Best for
- —AI agents needing real-time EUR/GBP rates without signup or API keys
- —Developers building pay-per-use forex data into applications 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 rate feeds
- —Users who need historical forex data or OHLC candles (not indicated as available)
- —Applications requiring fiat-settled billing rather than on-chain USDC payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/EURGBP/rate \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, and the docs/pricing/README pages are all empty wallet-connect stubs. The endpoint's behavior must be inferred entirely from its URL pattern.
Warnings
- —No OpenAPI or response schema available — response format is unknown
- —Documentation pages (/docs, /pricing, /README) render only a wallet-connect prompt with no technical content
- —Request body format (if any) is undocumented; POST method is confirmed but required fields are unknown
- —The specific endpoint /api/v1/forex/EURGBP/rate is not listed on the landing page (which shows /api/v1/finance/rates instead), so it may be an unlisted or auxiliary route
Citations
- —The endpoint returns HTTP 402 with x402 version 1 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/forex/EURGBP/rate
- —Payment is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network, equaling $0.02https://lowpaymentfee.com/api/v1/forex/EURGBP/rate
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Finance & Web3 category described as 'Market data and financial calculations'https://lowpaymentfee.com