# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from onchain-risk.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://onchain-risk.agentdiet.dev/v1/polymarket-prediction-stream?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: onchain-risk.agentdiet.dev
- Website: https://onchain-risk.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/onchain-risk-agentdiet-dev-polymarket-live-prediction-market-odds-19295940
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OHMWFMv9kiGjXaE5Apy5F

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 onchain-risk-agentdiet-dev-polymarket-live-prediction-market-odds-19295940
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities right now for 'will the Fed cut rates in 2025' — including volume and whale sentiment?

## When to prefer this

Choose this endpoint when you need live, real-money crowd-sourced probability estimates for macro, crypto, or AI events from Polymarket — especially when you want not just the odds but also volume and whale sentiment as conviction signals. Prefer this over general news or sentiment APIs when you need quantified probability rather than qualitative opinion.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Polymarket API or orderbook data temporarily unavailable — upstream data fetch failure
- Ambiguous topic matches multiple markets — may return the most liquid or first match
- Payment required (HTTP 402) if x402 micropayment not completed before request
- Stale or low-liquidity market returned if topic is niche or thinly traded

## 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://onchain-risk.agentdiet.dev/v1/polymarket-prediction-stream)

## 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 the matched prediction market 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/onchain-risk-agentdiet-dev-polymarket-live-prediction-market-odds-19295940/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from onchain-risk.agentdiet.dev](https://www.zero.xyz/host/onchain-risk.agentdiet.dev/llms.txt)