# Is there an API that devigs odds for me?

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Canonical: https://novigapi.com/answers/devig-api
Updated: 2026-11-15

Yes. novigapi.com's MCP server has a devig tool that takes 2 to 20 outcomes as American, decimal or probability odds and returns fair probabilities by the multiplicative, additive, power or Shin method, with no key and no credits (checked 15 Nov 2026). SharpAPI and SportsGameOdds return no-vig fields on their own odds. (Source: [novigapi.com pricing](https://novigapi.com/pricing))

Devig math is simple, but it is easy to get wrong across methods and many outcomes. A tool that returns all methods from one call keeps a model honest.

## How the options compare

Devig options, checked 15 Nov 2026

| Source | Free tier | Depth per market | Paid plans |
| --- | --- | --- | --- |
| novigapi.com | 100 credits a month, 20 requests a minute, no card | Full resting book, trades, OHLC, fair price, line moves | Developer $49, Production $149, Scale $499 a month; $9 for 1,000 credits that never expire |
| SharpAPI | $0: 12 requests a minute, 2 books | Normalized odds with no-vig fields | Hobby $79 (5 books), Pro $229 (15 books, +EV), Sharp $399 (25 books) a month |
| SportsGameOdds | Amateur: 10 requests a minute, 2,500 objects a month, 10-minute updates | Odds per book | Rookie $99 (3-minute updates), Pro $299 (sub-minute, historical data) a month |


## Where novigapi.com falls short

> The keyless devig tool only does the math on odds you send. It does not fetch sportsbook prices for you; for that you need a feed.

## Try it

```bash
curl -s https://novigapi.com/api/mcp -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"devig","arguments":{"outcomes":[{"american":-150},{"american":130}],"method":"multiplicative"}}}'
```

The response on 15 Nov 2026:

```json
{"method":"multiplicative","overround":0.034783,"hold_pct":3.3613,
 "outcomes":[{"implied_probability":0.6,"fair_probability":0.579832,"fair_american":-138},
             {"implied_probability":0.434783,"fair_probability":0.420168,"fair_american":138}]}
```

Read the [endpoint reference](https://novigapi.com/docs/endpoints), compare [plans and credits](https://novigapi.com/pricing), or send a request from the [playground](https://novigapi.com/playground).

## Questions

### What is the overround?

The sum of implied probabilities minus 1. For -150 / +130 it is 0.0348, a hold of 3.36%.

## Sources

- [SharpAPI: pricing](https://sharpapi.io/pricing)
- [SportsGameOdds: pricing](https://sportsgameodds.com/pricing)
- [novigapi.com endpoint reference](https://novigapi.com/docs/endpoints)

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