# 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, $0.015/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://preflight.agentdiet.dev/v1/polymarket-prediction-stream?utm_source=zero.xyz
- Price: $0.015/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-838ffde4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cT8SJjPqVBVA_Z3k1Y8mv

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-838ffde4
```

Example prompt: What are the current Polymarket odds and implied Yes/No probability for a US recession in 2025 — including volume and whale sentiment?

## When to prefer this

Use this endpoint when you need real-time crowd-sourced probability estimates for macro, crypto, political, or AI events, particularly when you want orderbook depth and whale sentiment in addition to simple odds. Prefer this over news APIs or LLM-based estimates when you need market-derived, financially-staked probabilities rather than editorial opinion.

## Known failure modes

- No active Polymarket market found for the given topic — returns empty or no-match result
- Ambiguous topic keyword matching multiple markets — may return the most relevant or require refinement
- Network or upstream Polymarket API outage — endpoint may return error or stale data
- Payment failure via x402 protocol — request not processed if USDC payment not authorized

## 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/polymarket-prediction-stream)

## Output

Returns live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities, market volume, and whale sentiment indicators for relevant 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/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-838ffde4/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)