# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Fetches live Polymarket orderbook data including implied Yes/No probabilities, trading volume, and whale sentiment for macro, crypto, and AI event prediction markets.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/polymarket-prediction-stream?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-polymarket-live-prediction-market-odds-8ad2426a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qFYAVxqpZKcM-ig1zzQEg

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 serp-extract-agentdiet-dev-polymarket-live-prediction-market-odds-8ad2426a -d '<json body>'
```

Example prompt: What are the live Polymarket odds and implied probabilities right now for 'Will the Fed cut rates in 2025?' — include trading volume and whale sentiment if available.

## When to prefer this

Use this endpoint when you need real-time crowd-sourced probability estimates from Polymarket's prediction markets for macro, crypto, geopolitical, or AI events. Prefer this over static news APIs or sentiment tools when you want market-implied probabilities backed by actual financial stakes and volume. Ideal for agents that need to factor crowd wisdom and whale positioning into decision-making rather than relying on opinion polls or news headlines.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Stale or delayed data if Polymarket API is experiencing downtime
- Ambiguous topic string matching multiple unrelated markets — may return multiple or incorrect market results
- Payment failure via x402 if insufficient USDC balance — returns 402 status
- Rate limiting if the same topic is queried too frequently in rapid succession

## 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://serp-extract.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), current trading volume, whale sentiment indicators, and relevant market metadata 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/serp-extract-agentdiet-dev-polymarket-live-prediction-market-odds-8ad2426a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)