# Prediction Market Odds & Summary

> Prediction Market Odds & Summary is a paid API for AI agents from clink-lithium-vault.fly.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).

Given a natural-language question, returns matched Polymarket and Kalshi markets with implied probabilities, 24h/7d price moves, cross-platform gap, 7-day history, and a one-sentence summary.

## Facts

- Endpoint: GET https://clink-lithium-vault.fly.dev/pm/odds?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prediction-market-odds-summary-23c92835
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ggea7tbvcvK9UWcf0-UZ5

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 prediction-market-odds-summary-23c92835
```

Example prompt: What do the prediction markets say about the Fed cutting rates this year? Pull the best Polymarket and Kalshi matches, their implied probabilities, how they've moved over the last 7 days, and highlight any gap between the two platforms.

## When to prefer this

Use this endpoint when you need a ready-to-use, agent-friendly synthesis of prediction market odds across both Polymarket and Kalshi for a given question — including cross-platform comparison, recent price movement, and a human-readable summary. Prefer this over raw search endpoints (like /pm/search) when you want enriched, structured output rather than a bare list of markets. Ideal for research grounding, forecasting context, event risk assessment, and any workflow where you need a single call to get a complete picture of market-implied probability.

## Known failure modes

- No matching market found for the question — returns empty or low-confidence matches
- Ambiguous question matches unrelated markets — best match may not reflect user intent
- Stale data if market hasn't traded recently — 24h/7d moves may be zero
- Rate limit or payment failure — 402 response if USDC payment not attached
- Kalshi or Polymarket API outage — partial results with one platform missing

## How this service works

What do the prediction markets say? Pass a question, get a finished read an agent can use directly: the best-matching market on Polymarket and on Kalshi with implied probability and 24h/7d moves, the cross-platform gap in points, a 7-day price history, a one-sentence summary, plus the top matching markets. Forecasting, research grounding, news context, event risk. ?q=<question>. Raw list only: /pm/search $0.01.

## Output

A JSON object containing: a one-sentence natural-language summary (e.g. 'Polymarket prices X at 5%, Kalshi at 4%'), a headline object with per-platform implied probabilities and the cross-platform gap in percentage points, a 7-day price history array with timestamps and probabilities, and a list of top matching markets across both platforms.

## 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": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string"
      },
      "limit": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "summary": "Polymarket prices \"...\" at 5% (-1 pts 24h, -3 pts 7d). Kalshi prices \"...\" at 4%.",
  "headline": {
   "kalshi": {
    "probability": 0.04
   },
   "gap_pts": 1,
   "polymarket": {
    "probability": 0.05
   }
  },
  "history_7d": {
   "points": [
    {
     "p": 0.08,
     "t": "2026-09-09T00:00:00.000Z"
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prediction-market-odds-summary-23c92835/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clink-lithium-vault.fly.dev](https://www.zero.xyz/host/clink-lithium-vault.fly.dev/llms.txt)