# 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, implied Yes/No probabilities, trading volume, and whale sentiment for a given macro, crypto, or AI prediction market topic

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/polymarket-alpha?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-67a31313
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n3wZ900BfiKQvF2h316jr

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-67a31313
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities right now for Bitcoin reaching $150k by end of 2025 — including volume and whale sentiment?

## When to prefer this

Use this endpoint when you need real-time crowd-sourced probability estimates on macro, crypto, political, or AI events from Polymarket — especially when you want implied odds, orderbook depth, volume context, and whale positioning in a single call. Prefer this over general news or sentiment APIs when you specifically want prediction market pricing as a forward-looking probability signal rather than retrospective analysis.

## Known failure modes

- No matching Polymarket market found for the given topic — returns empty or null results
- Ambiguous topic keyword matches multiple markets — may return unexpected or mixed results
- Stale or delayed data if Polymarket API is temporarily unavailable
- Payment failure via x402 if USDC balance is insufficient — returns HTTP 402
- Rate limiting if too many requests are made in a short period

## 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-alpha)

## Output

Returns a structured JSON 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 sentiment signals indicating how large traders are positioned on the market.

## 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-67a31313/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)