GBP/AUD forex rate via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides GBP/AUD foreign exchange rate data, accessible through the x402 payment protocol. It is part of a broader suite of APIs offered by lowpaymentfee.com covering finance, analytics, AI/ML, crypto, and utility services. Each request is paid individually at $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. No API keys or account registration are required — payment is handled inline via the x402 `X-PAYMENT` header. The x402 challenge confirms the endpoint is live, advertising version 1 of the protocol with an "exact" payment scheme settling to a specific address on Base.
Documentation beyond the landing page is extremely sparse. The /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact fields returned by the forex endpoint (e.g., bid, ask, mid, timestamp) are unknown and must be discovered by making a paid request.
Capabilities
Use cases
- —Fetching real-time or recent GBP/AUD exchange rates for trading applications
- —Integrating forex data into automated financial agents without API key management
- —Building currency conversion tools that pay per request via crypto micropayments
Fit
Best for
- —Agents or bots needing on-demand GBP/AUD rates without subscription commitments
- —Developers wanting keyless, pay-per-call forex data settled on Base
- —Low-volume or sporadic forex data consumers who prefer micropayments over monthly plans
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk rate plans
- —Users who need comprehensive multi-pair forex feeds in a single call
- —Anyone without a Base-compatible USDC wallet for x402 payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPAUD \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual data returned by the forex endpoint is entirely unknown, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content
- —Request body schema and response fields for the forex endpoint are undocumented
- —The broader lowpaymentfee.com platform lists many endpoint categories but provides no detailed docs for any of them
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base, maxAmountRequired 20000https://lowpaymentfee.com/api/v1/forex/GBPAUD
- —Site advertises $0.02 per request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/forex/GBPAUD
- —Documentation pages /docs, /api, /pricing, /README contain only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs