# 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 orderbook data, implied Yes/No probabilities, volume, and whale sentiment for a given prediction market topic or event keyword

## Facts

- Endpoint: GET https://prompt-guard.agentdiet.dev/v1/market-odds?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-69aacf3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c__Y6nZc2ntO-v_4W_o_k

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-69aacf3b
```

Example prompt: What are the current Polymarket odds and implied Yes/No probabilities for the Fed cutting interest rates 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 as reflected by actual money at stake on Polymarket. Prefer this over news sentiment or analyst forecasts when you want market-implied probabilities backed by financial incentives. Best for agents that need live prediction market odds without direct Polymarket API integration.

## Known failure modes

- No matching Polymarket market found for the given topic — returns empty or null results
- Ambiguous topic keyword matches multiple markets — may return the wrong market or require refinement
- Stale or delayed data if Polymarket API or orderbook feed is temporarily unavailable
- Payment failure via x402 micropayment protocol preventing the call from completing
- Rate limiting if the endpoint is queried too frequently

## 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/market-odds)

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities (as percentages or decimals), trading volume, and whale sentiment signals indicating how large traders are positioned on the market.

## 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-69aacf3b/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)