# Momus MLB Win Probability Model

> Momus MLB Win Probability Model is a paid API for AI agents from x402.momusai.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-13).

Returns pitcher-aware Elo-based win probabilities, fair odds, de-vigged market odds, and a 60/40 model-market blend for the next MLB game involving a specified team

## Facts

- Endpoint: GET https://x402.momusai.io/mlb?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/momus-mlb-win-probability-model-cdba3711
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_71DKCY698eKdhZ6FjDL2y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability momus-mlb-win-probability-model-cdba3711
```

Example prompt: What does the Momus MLB model say about the next Dodgers game — give me the win probabilities, fair odds, the 60/40 blend they bet on, and who the probable starters are.

## When to prefer this

Choose this endpoint when you need a deterministic, pitcher-aware MLB win probability model that blends Elo ratings with live market odds — especially when starter FIP/ERA and bullpen quality matter for the prediction. Prefer it over generic odds APIs when you want fair (de-vigged) probabilities and a model-market blend rather than raw sportsbook lines.

## Known failure modes

- Team name not recognized or misspelled — no matching game found
- No scheduled upcoming game found for the specified team
- Missing required query parameter (awayTeam or homeTeam)
- Stale or unavailable starter data for that game
- Payment not processed (x402 payment required at $0.05 USDC per call)

## How this service works

Momus MLB model: win probabilities for one game from a pitcher-aware Elo (starter FIP/ERA, bullpen, home field) fitted on 7,000+ games, the de-vigged market, the 60/40 blend Momus bets on, fair odds, probable starters. Deterministic, no LLM. Either team name is enough for that team's next game.

## Output

Returns win probabilities for both teams, fair odds, de-vigged market odds, the 60/40 model-market blend Momus uses for betting, probable starting pitchers with FIP/ERA metrics, bullpen ratings, and home field advantage adjustments — all deterministically computed from a model trained on 7,000+ games.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "awayTeam": {
       "type": "string"
      },
      "homeTeam": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/momus-mlb-win-probability-model-cdba3711/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.momusai.io](https://www.zero.xyz/host/x402.momusai.io/llms.txt)