Historical USD/JPY forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical exchange rate data for the USD/JPY currency pair. It is part of the lowpaymentfee.com platform, which offers a collection of pay-per-call APIs spanning finance, analytics, AI, and utilities. The endpoint is accessed via HTTP POST and is gated by the x402 payment protocol, settling in USDC on the Base network.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
The endpoint returns JSON (mimeType: application/json). However, the specific request body schema (e.g., date range parameters, granularity options) and the response schema (e.g., OHLC candles, close prices, timestamps) are not documented in the crawled material. The platform's docs, pricing, and API pages all rendered only a wallet-connect prompt with no additional technical documentation. Users should expect to experiment with the POST body or contact the provider for details on supported query parameters.
Capabilities
Use cases
- —Retrieving historical USD/JPY exchange rates for backtesting trading strategies
- —Feeding forex history into financial models or dashboards
- —Programmatic access to currency data without API key registration
- —Agent-driven forex data retrieval with on-chain micropayments
Fit
Best for
- —Developers needing on-demand forex history without subscriptions
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or sporadic forex data consumers who prefer pay-per-call
Not for
- —High-frequency trading requiring sub-second streaming forex data
- —Users who need free or bulk-discounted historical forex datasets
- —Applications requiring dozens of currency pairs in a single call
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/USDJPY/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{"from": "2024-01-01", "to": "2024-01-31"}'Example
Request
{
"to": "2024-01-31",
"from": "2024-01-01"
}Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base per call). However, there is no OpenAPI schema, no documented request/response format, and the docs pages only show a wallet-connect prompt. The request body and response structure are entirely inferred.
Warnings
- —No API documentation available — docs, pricing, and API pages all render only a wallet-connect prompt with no technical content.
- —Request body schema is unknown; the example request is speculative.
- —Response schema is unknown; no example response can be provided.
- —The specific forex data source and data quality/freshness are undisclosed.
Citations
- —Endpoint returns HTTP 402 with x402 challenge, confirming it is live on Base with USDC paymenthttps://lowpaymentfee.com/api/v1/forex/USDJPY/history
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/USDJPY/history
- —maxAmountRequired is 20000 base units (USDC 6 decimals = $0.02)https://lowpaymentfee.com/api/v1/forex/USDJPY/history