# Polymarket Live Prediction Market Odds & Implied Probability Feed

> Polymarket Live Prediction Market Odds & Implied Probability Feed is a paid API for AI agents from preflight.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

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

## Facts

- Endpoint: POST https://preflight.agentdiet.dev/v1/fomc-rate-odds?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: preflight.agentdiet.dev
- Website: https://preflight.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-08fb402f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f629U2bA5j2pcOFcQ1J-L

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 preflight-agentdiet-dev-polymarket-live-prediction-market-odds-08fb402f -d '<json body>'
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities for the next FOMC rate decision — include trading volume and any whale sentiment signals?

## When to prefer this

Use this endpoint when you need real-time, crowd-sourced probability estimates for macro, crypto, AI, or geopolitical events directly from Polymarket's live orderbooks. It is the right choice when you want market-implied odds (not analyst forecasts), whale sentiment, or trading volume as a signal. Prefer this over news or sentiment APIs when you want financially-committed crowd forecasts rather than editorial opinion.

## Known failure modes

- No matching Polymarket market found for the given topic keyword — returns empty or null result
- Polymarket API unavailable or rate-limited — upstream timeout or error response
- Ambiguous topic resolves to multiple markets — may return results for the wrong event
- Payment not settled via x402 — endpoint returns HTTP 402 before data is served
- Malformed or missing topic field — returns validation error

## 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://preflight.agentdiet.dev/v1/fomc-rate-odds)

## Output

Returns a structured object containing live Polymarket orderbook data for the queried topic, including implied Yes probability, implied No probability, total trading volume, and whale sentiment indicators 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/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-08fb402f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from preflight.agentdiet.dev](https://www.zero.xyz/host/preflight.agentdiet.dev/llms.txt)