# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from x402-audit.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://x402-audit.agentdiet.dev/v1/event-probabilities?utm_source=zero.xyz
- Price: $0.015/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: x402-audit.agentdiet.dev
- Website: https://x402-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/x402-audit-agentdiet-dev-polymarket-live-prediction-market-odds-d663322f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UNmjPt317PjMPCQ-MiQ53

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 x402-audit-agentdiet-dev-polymarket-live-prediction-market-odds-d663322f
```

Example prompt: What are the live Polymarket odds and implied Yes/No probability right now for 'Fed rate cut in 2025' — including trading volume and whether whales are leaning yes or no?

## When to prefer this

Choose this endpoint when you need real-time crowd-sourced probability estimates from Polymarket's prediction market for macro, crypto, AI, or geopolitical events — especially when you want market-implied odds rather than model forecasts or news sentiment. Ideal for agents that need live Yes/No probability percentages, volume data, and whale sentiment signals in a single call without building a Polymarket API integration from scratch.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Ambiguous topic matches multiple markets — may return multiple or incorrect markets
- Stale data if Polymarket API is temporarily unavailable or rate-limited
- Payment failure via x402 protocol results in 402 response before data is returned
- Very niche or recently created markets may have low liquidity or missing orderbook data

## 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://x402-audit.agentdiet.dev/v1/event-probabilities)

## Output

Returns a structured object containing live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities (as percentages or decimals), total trading volume, and whale/large-trader sentiment signals for matching prediction market events.

## 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/x402-audit-agentdiet-dev-polymarket-live-prediction-market-odds-d663322f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-audit.agentdiet.dev](https://www.zero.xyz/host/x402-audit.agentdiet.dev/llms.txt)