# 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 2026-10-28).

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

## Facts

- Endpoint: POST https://alpha-stream.agentdiet.dev/v1/polymarket-prediction-stream?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-28
- 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-f449c232
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FVZwsUEjsAXoGTRGAnWXH

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-f449c232 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need real-time crowd-sourced probability estimates for macro, crypto, political, or AI events from Polymarket's decentralized prediction market. It is ideal for agents that need to incorporate market-implied probabilities into decision-making, research, or reporting workflows. Prefer this over general news or sentiment APIs when you want a quantified probability signal backed by real money and orderbook depth rather than qualitative sentiment.

## Known failure modes

- Topic keyword matches no active Polymarket markets — returns empty or null market data
- Ambiguous topic string matches multiple unrelated markets — results may be unfocused
- Polymarket API or data feed outage — endpoint may return error or stale data
- Payment failure via x402 — call not executed if USDC balance is insufficient
- Rate limiting or quota exhaustion — repeated calls may be throttled

## 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 including implied Yes probability, implied No probability, current trading volume, market question metadata, and whale sentiment signals for the queried prediction market topic or 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/alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-f449c232/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)