Historical USD/TRY forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical exchange-rate data for the USD/TRY (US Dollar to Turkish Lira) currency pair. It is part of the lowpaymentfee.com platform, which offers a suite of data, AI, finance, and utility APIs all gated behind x402 micropayments on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers attach an X-PAYMENT header containing a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each request is independently paid.
The platform advertises a uniform $0.02/request pricing across all its endpoints. 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 request body schema (e.g., date range parameters, granularity options) and response shape are not documented in the crawled material, so callers will need to experiment or inspect the 402 challenge's outputSchema for hints.
Capabilities
Use cases
- —Retrieving historical USD/TRY exchange rates for financial analysis
- —Backtesting currency trading strategies involving the Turkish Lira
- —Building dashboards that display historical forex trends
- —Feeding FX data into risk models or portfolio analytics
- —Agent-driven micropayment access to forex data without API keys
Fit
Best for
- —Developers needing on-demand historical forex data without subscriptions
- —AI agents that can pay per-request via x402 on Base
- —Applications requiring USD/TRY historical rates in JSON format
Not for
- —Real-time streaming forex data (this is a history endpoint, not a live feed)
- —Users who cannot transact in USDC on the Base network
- —Bulk historical data downloads where per-request pricing would be cost-prohibitive
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/USDTRY/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documented request schema, no response examples, and the docs/pricing/README pages are all empty wallet-connect stubs. The specific parameters for the history endpoint (date range, granularity, etc.) are entirely unknown.
Warnings
- —No documentation available beyond the landing page — /docs, /pricing, and /README all render only a wallet-connect prompt.
- —Request body schema and response format are undocumented; callers must experiment.
- —The endpoint's actual data source and update frequency are unknown.
- —No OpenAPI spec or AI plugin manifest was found.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base with maxAmountRequired of 20000 base units (0.02 USD).https://lowpaymentfee.com/api/v1/forex/USDTRY/history
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/forex/USDTRY/history