# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from preflight.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-28).

Fetches live Polymarket prediction market orderbooks, implied Yes/No probabilities, volume, and whale sentiment for a given macro, crypto, or AI event topic.

## Facts

- Endpoint: POST https://preflight.agentdiet.dev/v1/market-odds?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Provider: preflight.agentdiet.dev
- Website: https://preflight.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-521bf9c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NASfeGNYZUFrccJDmugKw

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 preflight-agentdiet-dev-polymarket-live-prediction-market-odds-521bf9c5 -d '<json body>'
```

Example prompt: What are the current live Polymarket odds and implied yes/no probability for 'Will the Fed cut rates in 2025?' — including volume and whale sentiment?

## When to prefer this

Use this endpoint when you need real-time, crowd-sourced probability estimates for macro, crypto, political, or AI events from Polymarket's decentralized prediction market. Prefer this over news sentiment APIs when you want market-implied probabilities backed by actual money, orderbook depth, and whale positioning rather than editorial opinion or social sentiment.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null results
- Ambiguous topic string matches multiple markets — may return an aggregated or first-matched result
- Polymarket API downtime or rate limiting causes stale or failed data retrieval
- Payment failure (HTTP 402) if USDC balance is insufficient for the $0.01 per-call fee
- Overly broad topic query returns low-confidence or irrelevant market matches

## How this service works

Fetches live Polymarket prediction market orderbooks, implied Yes/No probabilities, volume, and whale sentiment for macro/crypto/AI events. (Live x402 v2, IETF MPP & MCP endpoint at https://preflight.agentdiet.dev/v1/market-odds)

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes probability, implied No probability, current trading volume, and whale sentiment signals for the matched prediction market event.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "topic"
 ],
 "properties": {
  "topic": {
   "type": "string",
   "minLength": 1,
   "description": "Prediction market topic, event keyword, or question to query live Polymarket odds"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-521bf9c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from preflight.agentdiet.dev](https://www.zero.xyz/host/preflight.agentdiet.dev/llms.txt)