# Polymarket Live Prediction Market Odds & Implied Probability Feed

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

Fetches live Polymarket prediction market implied Yes/No probabilities, orderbook data, volume, and whale sentiment for a given topic or event keyword

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/market-odds?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: shopify-spy.agentdiet.dev
- Website: https://shopify-spy.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-spy-agentdiet-dev-polymarket-live-prediction-market-odds-b2e61cc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8lX3OOPnTP-oRKLL59GsX

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 shopify-spy-agentdiet-dev-polymarket-live-prediction-market-odds-b2e61cc7
```

Example prompt: What are the current Polymarket odds and implied Yes/No probabilities for the Fed cutting interest rates this quarter, including whale sentiment and trading volume?

## When to prefer this

Choose this endpoint when you need real-time crowd-sourced probability estimates from Polymarket's prediction market for macro, crypto, AI, or political events. It is especially useful when you want whale sentiment and orderbook pressure in addition to simple odds. Prefer it over general news or sentiment APIs when you need quantified market-implied probability rather than qualitative opinion.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Stale data if Polymarket API is temporarily unavailable or rate-limited
- Ambiguous topic query matching multiple markets — may return aggregated or first-match result
- Payment failure via x402 if USDC balance is insufficient — returns 402 status
- Very niche or newly created markets may have low liquidity resulting in unreliable implied probabilities

## 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://shopify-spy.agentdiet.dev/v1/market-odds)

## Output

Returns a structured object containing live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities, 24h trading volume, whale sentiment signals, and relevant market metadata for macro, crypto, and AI-related 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/shopify-spy-agentdiet-dev-polymarket-live-prediction-market-odds-b2e61cc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-spy.agentdiet.dev](https://www.zero.xyz/host/shopify-spy.agentdiet.dev/llms.txt)