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Numora ROI Calculator — Financial Math API
x402
Numora ROI Calculator — Financial Math API is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-16).
Computes Return on Investment (ROI) given a cost and gain value, returning the ROI percentage and related computation details.
Price / call$0.1
Success—
StatusUnknown
How this service works
100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.
Output
Returns a JSON object with a 'success' boolean, a 'result' object containing the computed ROI value (typically as a percentage), and a 'computation' string describing in plain English what was calculated (e.g. 'ROI of 50% based on cost $100 and gain $150').
Example use cases
Marketing campaign profitability check
“I ran a Facebook ad campaign that cost $350 and generated $920 in sales. What was the ROI on that campaign?”
Real estate investment return
“I bought a property for $150,000 and sold it for $195,000. Can you calculate the ROI on that investment?”
Product launch cost-benefit analysis
“We spent $5,000 developing and launching a new product and made $8,500 in its first quarter. What's the return on investment?”
Technical details
Endpoint
POSThttps://numomo.vercel.app/api/financial/roiWhen to prefer
Choose this endpoint when you need a fast, serverless, dependency-free computation of ROI from raw cost and gain numbers. Ideal for AI agents that need a reliable math microservice without building the formula themselves, especially when x402 micropayment billing per call is acceptable. Prefer this over general-purpose code execution or LLM-calculated math when you need a guaranteed, consistent numeric result.
Side effects
- Missing required 'cost' or 'gain' field returns a validation error
- Cost of zero may cause division-by-zero or NaN result
- Non-numeric input types rejected with schema validation error
- Payment failure via x402 results in 402 Payment Required response before computation
- Server-side error on the Vercel deployment may return 500 with no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| costrequired | number | |
| gainrequired | number |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | object | Computation result varies by endpoint |
| successrequired | boolean | Always true on success |
| computationrequired | string | Human-readable description of what was computed |
Tags
x402
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