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finmath DCA Backtest
x402
finmath DCA Backtest is a paid API for AI agents from finmath.qzqh5rrbkz.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Backtests a dollar-cost averaging (DCA) strategy against a historical price series, computing exact portfolio metrics using deterministic arithmetic
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 a result object with DCA portfolio metrics computed from the price series and fixed contribution, including total invested, total portfolio value, number of units accumulated, average cost basis, total return, and possibly period-by-period breakdown; plus a meta object with request metadata.
Example use cases
Example prompt
“Run a DCA backtest for me — here are the weekly closing prices for ETH over the past year: [1800, 1750, 1900, 2100, 1950, 2200, 2400, 2300, 2500, 2450, 2600, 2700, 2650, 2800, 2750, 2900, 3000, 2950, 3100, 3050, 3200, 3150, 3300, 3250, 3400, 3350, 3500, 3450, 3600, 3550, 3700, 3650, 3800, 3750, 3900, 3850, 4000, 3950, 4100, 4050, 4200, 4150, 4300, 4250, 4400, 4350, 4500, 4450, 4600, 4550, 4700] — and assume I put in $200 each period.”
Technical details
Endpoint
POSThttps://finmath.qzqh5rrbkz.workers.dev/v1/dca_backtestWhen to prefer
Use this endpoint when you need exact, deterministic DCA backtest calculations rather than relying on LLM arithmetic, which is error-prone for iterative financial computations. Prefer this over manual calculation when you have a historical price series and want precise average cost basis, total return, and unit accumulation figures for a fixed periodic contribution strategy.
Side effects
- Missing required 'prices' array — returns 400 error
- Missing required 'contribution' amount — returns 400 error
- Empty prices array — may return zero or error
- Non-numeric values in prices array — validation error
- Payment not provided or insufficient USDC — 402 Payment Required
- Contribution value of zero or negative — may return error or degenerate result
Input
{
"prices": [
100,
102,
98,
105,
103,
107,
104,
106
],
"contribution": 500
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| pricesrequired | array | prices |
| contributionrequired | number | contribution |
Output
{
"meta": {
"tool": "dca_backtest",
"disclaimer": "Deterministic calculation utility. Not financial, investment, or trading advice.",
"deterministic": true
},
"result": {
"roi": 0.028672917161252826,
"avg_cost": 103.045388122514,
"final_value": 4114.691668645011,
"total_units": 38.817845930613316,
"total_invested": 4000
}
}Schema · Response
| Field | Type | Description |
|---|---|---|
| metarequired | object | |
| resultrequired | — |
Tags
x402
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