# 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 prediction market orderbooks, implied Yes/No probabilities, volume, and whale sentiment for macro, crypto, and AI events by topic keyword.

## Facts

- Endpoint: POST https://preflight.agentdiet.dev/v1/polymarket-prediction-stream?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-cd452808
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CudUp63IxpUIc2dWZbKIM

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-cd452808 -d '<json body>'
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities for Bitcoin hitting $100k this year — include 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, or AI events from Polymarket's decentralized prediction market. Prefer this over news APIs when you want market-implied probabilities and trader sentiment rather than editorial opinion. Best suited for agents that need quantitative Yes/No odds for event-driven decision-making or market research.

## Known failure modes

- Topic keyword matches no active Polymarket market — returns empty or null result
- Polymarket API upstream unavailable — may return 502 or timeout
- Ambiguous topic string matches multiple markets — may return blended or unexpected results
- Payment failure (HTTP 402) if USDC balance is insufficient
- Rate limiting if the same topic is queried too rapidly without idempotency key

## 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 a structured object containing live Polymarket orderbook data for the queried topic, including implied Yes and No probabilities, total trading volume, and whale sentiment signals derived from large-order activity in 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/preflight-agentdiet-dev-polymarket-live-prediction-market-odds-cd452808/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)