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QuantOracle FX Interest Rate Parity
x402
QuantOracle FX Interest Rate Parity is a paid API for AI agents from api.quantoracle.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Calculates covered or uncovered interest rate parity, detects FX mispricing, and identifies arbitrage opportunities between forward and theoretical forward rates.
Price / call$0.005
Success—
StatusUnknown
How this service works
QuantOracle: fx/interest-rate-parity
Output
Returns the theoretical forward rate, whether the market rate is mispriced, the arbitrage profit in absolute and percentage terms, the forward premium percentage, the recommended carry direction (e.g. BORROW_FOREIGN), and the annualized carry yield. Response time is typically under 10ms.
Example use cases
Example prompt
“Check covered interest rate parity for a EUR/USD spot rate of 1.085, domestic rate 5.25%, foreign rate 3.75%, over 1 year — the actual forward rate on offer is 1.07, and I want to know if it's mispriced and what the arbitrage profit would be.”
Technical details
Endpoint
POSThttps://api.quantoracle.dev/v1/fx/interest-rate-parityWhen to prefer
Use this endpoint when you need a fast, programmatic check of interest rate parity conditions for a specific currency pair — particularly when you have a concrete forward rate to benchmark against the theoretical value and want to detect arbitrage or carry trade opportunities. Prefer this over manual spreadsheet calculations or generic financial data APIs that don't perform the full covered/uncovered parity analysis with arbitrage profit quantification.
Side effects
- Missing required fields (spot_rate, domestic_rate, foreign_rate, time_years) returns a 400 error
- Invalid parity_type value (not 'covered' or 'uncovered') causes a validation error
- Negative or zero time_years may produce nonsensical results or an error
- actual_forward is optional for uncovered parity but required for mispricing detection — omitting it may result in null arbitrage fields
- Payment failure via x402 protocol returns a 402 Payment Required response
Input
{
"spot_rate": 1.085,
"time_years": 1,
"parity_type": "covered",
"foreign_rate": 0.0375,
"domestic_rate": 0.0525,
"actual_forward": 1.07
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| spot_rate | number | Current spot exchange rate |
| time_years | number | Time horizon in years |
| parity_type | string | Parity type: covered or uncovered |
| foreign_rate | number | Foreign interest rate (annualized) |
| domestic_rate | number | Domestic interest rate (annualized) |
| actual_forward | — | Actual forward rate for arbitrage detection |
Output
{
"ms": 7.87,
"_meta": {
"url": "https://quantoracle.dev",
"docs": "https://api.quantoracle.dev/docs",
"powered_by": "QuantOracle"
},
"mispriced": true,
"parity_type": "covered",
"arbitrage_pct": 2.8283,
"carry_direction": "BORROW_FOREIGN",
"arbitrage_profit": 0.0307,
"forward_premium_pct": 1.4458,
"theoretical_forward": 1.100687,
"annualized_carry_yield": 1.5
}Tags
x402
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