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finmath Bond Yield to Maturity (YTM) Calculator
x402
finmath Bond Yield to Maturity (YTM) Calculator is a paid API for AI agents from finmath.qzqh5rrbkz.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Computes the yield to maturity (YTM) of a bond given its face value, market price, coupon rate, maturity, and payment frequency.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic finance and crypto math for AI agents: TradFi (NPV, IRR, XIRR, Black-Scholes + Greeks, bonds, VaR, Sharpe) and DeFi (impermanent loss, perp liquidation, funding, Uniswap v3, health factor, cost basis). Exact, model-free arithmetic that LLMs get wrong — priced per call in USDC.
Output
Returns the calculated yield to maturity (YTM) as an annualized rate, along with metadata about the computation. The result is a deterministic, exact arithmetic answer — not an LLM estimate.
Example use cases
Example prompt
“What's the yield to maturity on a bond with a $1,000 face value, currently priced at $950, a 5% annual coupon rate, 10 years to maturity, and semi-annual coupon payments?”
Technical details
Endpoint
POSThttps://finmath.qzqh5rrbkz.workers.dev/v1/bond_ytmWhen to prefer
Use this endpoint when you need exact, deterministic bond YTM calculations rather than relying on an LLM's arithmetic. Ideal for fixed income analysis, portfolio tools, or any workflow requiring precise yield math. Prefer this over general-purpose LLMs which are known to make arithmetic errors on iterative financial computations like YTM.
Side effects
- Missing required fields (face, price, coupon_rate) returns a validation error
- Negative or zero price/face value may cause computation errors
- Impossible yield scenarios (e.g. price far exceeding face with no plausible YTM) may fail to converge
- Non-numeric inputs for numeric fields will cause schema validation failure
Input
{
"face": 1000,
"freq": 2,
"price": 950,
"years": 5,
"coupon_rate": 0.05
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| facerequired | number | face |
| freq | number | freq |
| pricerequired | number | price |
| years | number | years |
| coupon_raterequired | number | coupon_rate |
Output
{
"meta": {
"tool": "bond_ytm",
"disclaimer": "Deterministic calculation utility. Not financial, investment, or trading advice.",
"deterministic": true
},
"result": 0.061776246408892316
}Schema · Response
| Field | Type | Description |
|---|---|---|
| metarequired | object | |
| resultrequired | — |
Tags
x402
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