# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from prompt-guard.agentdiet.dev, paid per call via MPP, $0.015/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://prompt-guard.agentdiet.dev/v1/polymarket-feed?utm_source=zero.xyz
- Price: $0.015/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: prompt-guard.agentdiet.dev
- Website: https://prompt-guard.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-9e935362
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sTxNtNkIcKdTHEb2A1axh

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 prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-9e935362
```

Example prompt: What are the current Polymarket odds and implied Yes/No probabilities for Bitcoin reaching $150k this year — include volume and whale sentiment if available?

## When to prefer this

Use this endpoint when you need real-time crowd-sourced probability estimates for macro, crypto, or AI events from Polymarket's liquid prediction markets, especially when you want implied probabilities, volume, and large-trader sentiment in a single call rather than scraping Polymarket directly.

## Known failure modes

- No matching Polymarket market found for the given topic — returns empty or null result
- Stale or delayed data if Polymarket API is experiencing latency
- Ambiguous topic keyword matching multiple markets — may return the most liquid or first match
- HTTP 402 payment required if x402 micropayment is not fulfilled
- Rate limiting or upstream Polymarket API errors returning 5xx responses

## 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://prompt-guard.agentdiet.dev/v1/polymarket-feed)

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities (as percentages or decimals), trading volume, and whale sentiment signals for the matched prediction market 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/prompt-guard-agentdiet-dev-polymarket-live-prediction-market-odds-9e935362/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prompt-guard.agentdiet.dev](https://www.zero.xyz/host/prompt-guard.agentdiet.dev/llms.txt)