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FinMath for Agents
x402
FinMath for Agents is a paid API for AI agents from x402-finmath.whale-feed-max.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Computes financial math for trading agents: position sizing, liquidation price, DCA schedules, fees, slippage cost, and APY — paid per-call via USDC on Base.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call financial math utilities for AI trading agents: position sizing, liquidation, DCA, fees, slippage, APY. Payment via x402, USDC on Base. No API keys, no accounts.
Output
Returns a flat JSON object with whichever computed fields apply to the requested calculation: positionSize (units to trade), riskAmount (dollar risk), liquidationLong (liquidation price for longs), perSlot and totalCost (DCA breakdown), fee and net (fee-adjusted amounts), slippageCost (slippage in dollar terms), and apyPct (annualized yield). Unused fields are omitted.
Example use cases
Leveraged position liquidation check
“I'm entering a long at $42,000 with 10x leverage and $5,000 margin — what's my liquidation price so I know where to set my safety stop?”
DCA schedule per slot sizing
“I want to DCA $3,000 into an asset over 8 slots — how much should I invest in each slot?”
APR to APY conversion for staking
“A staking pool is offering 18% APR compounded daily — what does that work out to in APY so I can compare it to other yield opportunities?”
Technical details
Endpoint
POSThttps://x402-finmath.whale-feed-max.workers.dev/v1/calcWhen to prefer
Choose this endpoint when an AI trading agent needs fast, deterministic financial math computed server-side without managing spreadsheet logic locally. It is ideal for agents that need position sizing, liquidation prices, or DCA slot sizing in real-time during trade execution flows, and prefer pay-per-call USDC billing with no API key management. Prefer alternatives if you need market data, price feeds, or order execution — this is purely a math utility.
Side effects
- Missing required parameters for the selected calculation type returns an error or null fields
- Invalid or zero values for denominator fields (e.g. slPct=0) may cause divide-by-zero errors
- Payment failure via x402/USDC prevents the call from completing
- Passing parameters for the wrong calculation type (e.g. APY params to a position sizing call) returns irrelevant or empty results
- Network timeout on the Cloudflare Worker edge node
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| apr | number | APR, % (apy) |
| entry | number | Entry price (liq) |
| price | number | Asset price (slippage) |
| slPct | number | Stop-loss, % (position) |
| slots | number | Number of DCA slots (dca) |
| total | number | Total amount to invest (dca) |
| amount | number | Trade amount (fees, slippage) |
| equity | number | Account equity (position) |
| feePct | number | Fee, % (fees) |
| margin | number | Margin (liq, optional) |
| riskPct | number | Risk, % of equity (position) |
| slipPct | number | Slippage, % (slippage) |
| leverage | number | Leverage (liq) |
| compoundPerYear | number | Compounds per year (apy) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| fee | number | |
| net | number | |
| apyPct | number | |
| perSlot | number | |
| totalCost | number | |
| riskAmount | number | |
| positionSize | number | |
| slippageCost | number | |
| liquidationLong | number |
Tags
x402
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