# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from prompt-guard.agentdiet.dev, paid per call via MPP, $0.015/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://prompt-guard.agentdiet.dev/v1/prediction-markets?utm_source=zero.xyz
- Price: $0.015/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: prompt-guard.agentdiet.dev
- Website: https://prompt-guard.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-ad90764f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G-6OpYvoRqSJiI8djFxcV

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 prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-ad90764f
```

Example prompt: What are the live Polymarket odds and implied yes/no probabilities for a US Federal Reserve rate cut happening before the end of this year — including volume and any whale sentiment signals?

## When to prefer this

Choose this endpoint when you need real-time crowd-sourced probability estimates from Polymarket's active prediction market participants, especially for macro, crypto, or AI-related events. It is ideal when you want market-implied odds rather than model-based forecasts, and when whale sentiment and trading volume context are useful signals. Prefer alternatives if you need historical odds, sports markets, or non-financial event predictions not covered by Polymarket.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Polymarket API or data feed unavailable — upstream timeout or error
- Ambiguous topic keyword matching multiple unrelated markets — results may include irrelevant markets
- Payment not completed via x402 — request rejected with 402 Payment Required
- Rate limiting or quota exceeded — request blocked

## 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://prompt-guard.agentdiet.dev/v1/prediction-markets)

## Output

Returns a structured object containing live Polymarket orderbook data, implied Yes probability and No probability percentages, total market trading volume, and whale sentiment indicators for markets matching the queried topic or keyword.

## 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/prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-ad90764f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prompt-guard.agentdiet.dev](https://www.zero.xyz/host/prompt-guard.agentdiet.dev/llms.txt)