# 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 orderbook data including implied Yes/No probabilities, trading volume, and whale sentiment for any prediction market topic including elections, crypto, AI, and macro events.

## Facts

- Endpoint: GET https://preflight.agentdiet.dev/v1/election-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-0bb3ca8f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hKN2WIs5HyOZDCilnqpK4

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-0bb3ca8f
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities for the 2024 US presidential election — and is there any notable whale activity in that market right now?

## When to prefer this

Choose this endpoint when you need real-time crowd-sourced probability estimates on macro, political, crypto, or AI events as priced by actual market participants on Polymarket. Prefer this over news sentiment APIs when you need quantified probability estimates backed by real money, or over general web search when you specifically need Polymarket orderbook and volume data. Best for agents doing event-driven decision making, risk assessment, or market intelligence workflows.

## Known failure modes

- No matching Polymarket market found for the given topic — returns empty or error response
- Topic query too vague or ambiguous — may return unrelated market
- Polymarket API unavailable or rate-limited — upstream fetch failure
- Payment not processed (x402) — returns 402 Payment Required before serving data
- Market may be resolved/closed — stale or unavailable 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/election-odds)

## Output

Returns live Polymarket orderbook snapshot including implied Yes probability, implied No probability, current trading volume, whale sentiment indicators, and market metadata for the queried prediction market topic.

## 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-0bb3ca8f/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)