# Polymarket Live Prediction Market Odds & Implied Probability Feed

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

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

## Facts

- Endpoint: GET https://alpha-stream.agentdiet.dev/v1/fomc-rate-odds?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-abcd4adf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eu-8Jrn2AkmkmBL8Ty-rD

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 alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-abcd4adf
```

Example prompt: What are the live Polymarket odds and implied Yes/No probabilities right now for 'FOMC rate cut in July'? I want to see volume and whale sentiment too.

## When to prefer this

Use this endpoint when you need real-time crowd-sourced implied probabilities and orderbook sentiment from Polymarket for macro, crypto, political, or AI events. Prefer this over news sentiment APIs when you want market-priced probability estimates rather than editorial opinion, and over general financial data APIs when the question is event-based rather than asset-price-based.

## Known failure modes

- Topic keyword does not match any active Polymarket market — returns empty or no-results response
- Polymarket API is temporarily unavailable — upstream timeout or 5xx error
- Payment not processed — HTTP 402 response requiring x402 USDC payment
- Ambiguous topic keyword matches multiple markets — may return aggregated or best-match data
- Market has resolved or expired — returns stale or historical data rather than live odds

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

## Output

Returns live Polymarket orderbook data including implied Yes and No probabilities (as percentages or decimals), current trading volume, and whale sentiment signals for the queried prediction market topic or event keyword.

## 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/alpha-stream-agentdiet-dev-polymarket-live-prediction-market-odds-abcd4adf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)