# Polymarket Live Prediction Market Odds & Implied Probability Feed

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

Fetches live Polymarket orderbook data, Yes/No implied probabilities, trading volume, and whale sentiment for a given macro, crypto, or AI event topic

## Facts

- Endpoint: GET https://alpha-stream.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: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-b8eb69d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xdECAUxCsmj_54sUrzer-

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 alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-b8eb69d1
```

Example prompt: What are the live Polymarket odds right now for a Fed interest rate cut in 2025 — give me the yes/no implied probabilities, volume, and whether whales are leaning yes or no?

## When to prefer this

Use this endpoint when you need real-time crowd-sourced probability estimates for macro, crypto, political, or AI events as expressed by actual money-backed prediction market participants on Polymarket. Prefer this over news sentiment or analyst forecasts when you want market-implied probabilities with volume and whale positioning context. Best for agents that need to quantify uncertainty around specific binary outcomes.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null market data
- Stale or delayed orderbook data if Polymarket API is lagging
- Ambiguous topic string matching multiple unrelated markets — may return incorrect market
- Payment not processed (HTTP 402) if x402 micropayment fails
- Rate limiting or timeout if upstream Polymarket data source is unavailable

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

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes/No probabilities (as percentages or decimals), current trading volume, and whale sentiment indicators reflecting large-position trader positioning on the event outcome.

## 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/alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-b8eb69d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)