# 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, $0.015/call, status unknown (last checked 2026-10-21).

Fetches live Polymarket prediction market orderbook data, implied Yes/No probabilities, trading volume, and whale sentiment for macro, crypto, and AI events by topic keyword.

## Facts

- Endpoint: GET https://preflight.agentdiet.dev/v1/polymarket-odds?utm_source=zero.xyz
- Price: $0.015/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-fef19780
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pOjaoMJVoXZY0rrckeBbz

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-fef19780
```

Example prompt: What are the current Polymarket odds and implied Yes/No probabilities for a Fed rate cut happening before the end of this year — 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 prediction market. Prefer this over news sentiment or analyst forecasts when you want market-implied probabilities backed by actual money at stake. Best for agents monitoring event risk, trading signals, or calibrating AI forecasts against crowd wisdom.

## Known failure modes

- No matching market found for the given topic keyword — returns empty or null results
- Topic query too vague — matches multiple markets and returns ambiguous results
- Polymarket API upstream unavailability causing stale or failed data fetch
- Rate limiting or payment failure (HTTP 402) if micropayment not processed correctly
- Market may be resolved/closed, returning historical rather than live odds

## 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/polymarket-odds)

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities (as percentages or decimals), 24h trading volume, and whale sentiment signals indicating large-player positioning on the 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-fef19780/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)