# Liquid Agent: Polymarket ETH 15m Price to Beat

> Liquid Agent: Polymarket ETH 15m Price to Beat is a paid API for AI agents from api.liquidagent.ai, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-12).

Returns the official Polymarket ETH 15-minute Up/Down settlement price (Chainlink 60s TWAP), live ETH price, distance from the threshold, seconds remaining, and market token prices in a single call.

## Facts

- Endpoint: GET https://api.liquidagent.ai/v1/polymarket/eth-15m?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/liquid-agent-polymarket-eth-15m-price-to-beat-2ad89430
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oGIPyyrSP8_f056G8SNQr

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 liquid-agent-polymarket-eth-15m-price-to-beat-2ad89430
```

Example prompt: What's the official ETH price to beat right now on the Polymarket 15-minute up/down market — and how far is the live Chainlink price from that threshold with how many seconds left in the window?

## When to prefer this

Choose this endpoint when you need the exact official Polymarket ETH 15-minute Up/Down settlement reference price (the Chainlink 60s TWAP) alongside live price tracking and market token prices in a single call. Prefer it over manual Chainlink queries when you need the precise price matched to Polymarket's own settlement logic, or over Polymarket's own API when you need the oracle price and distance gap pre-computed.

## Known failure modes

- Invalid or future unix timestamp in ?start= returns error or empty outcome
- Market not yet open or between windows may return no active market data
- Chainlink oracle delay may cause slight lag in live price
- Network or payment failure (x402) results in 402 Payment Required

## How this service works

Polymarket ETH 15m Up/Down in one call: the OFFICIAL price to beat (the 60 s Chainlink TWAP before the window, matched to the cent against Polymarket's results), the live Chainlink price and its distance from the price to beat, seconds left, token ids and the market's own prices. ?start=<unix> returns a past window's official settle and outcome. $0.002 USDC. Data, not financial advice.

## Output

Returns a JSON object with: the market slug, asset, timeframe, seconds remaining in the current window, status (live/settled), official price to beat (60s Chainlink TWAP before window), live Chainlink ETH price, distance between live price and the price to beat, and current market prices for up and down tokens. For historical queries (via ?start= param), returns the settled price to beat and final outcome.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "market": {
   "slug": "eth-updown-15m-1790652300",
   "asset": "ETH",
   "timeframe": "15m",
   "secondsLeft": 120
  },
  "status": "live",
  "distance": 55.93,
  "chainlink": {
   "price": 83140.29
  },
  "priceToBeat": 83084.36,
  "marketPrices": {
   "up": 0.925,
   "down": 0.075
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/liquid-agent-polymarket-eth-15m-price-to-beat-2ad89430/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.liquidagent.ai](https://www.zero.xyz/host/api.liquidagent.ai/llms.txt)