# EMC2 AI Polymarket Chain Compare

> EMC2 AI Polymarket Chain Compare is a paid API for AI agents from emc2ai.io, paid per call via x402, $1.000000/call, status unknown (last checked 2026-09-13).

Compares Polymarket API data against Polygon blockchain events to surface latency arbitrage opportunities, whale signals, and settlement predictions for prediction market trading.

## Facts

- Endpoint: POST https://emc2ai.io/x402/bitquery/polymarket-chain-compare/raw
- Price: $1.000000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/emc2ai-io-17606726
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vhzf74u_JduplqG216sLj

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 emc2ai-io-17606726 -d '<json body>'
```

Example prompt: Check for any latency arbitrage gaps and whale signals on Polymarket right now by comparing the Polymarket API feed against live Polygon blockchain events, and tell me if there are any actionable settlement predictions.

## When to prefer this

Choose this endpoint when you need to cross-reference Polymarket's off-chain API data against actual Polygon blockchain state to exploit information asymmetry, detect whale accumulation before prices move, or anticipate settlement outcomes before the API reflects them. Prefer over generic DEX analytics when your focus is specifically prediction markets on Polymarket/Polygon.

## Known failure modes

- Polygon RPC node unavailable causing chain data fetch failure
- Polymarket API rate limit or downtime causing incomplete comparison
- No significant latency discrepancies found returning empty arbitrage signals
- Payment failure due to insufficient USDC balance for x402 call
- Timeout if blockchain event scan window is too large

## How this service works

Compare Polymarket API vs Polygon blockchain events for latency arbitrage, whale signals, settlement predictions.

## Output

Returns a structured comparison of Polymarket API data versus Polygon blockchain event data, highlighting timing discrepancies that suggest latency arbitrage windows, identified whale wallet movements, and probabilistic settlement predictions for active markets.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "string",
   "description": "Maximum number of results to return (default: 10, max: 500)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/emc2ai-io-17606726/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from emc2ai.io](https://www.zero.xyz/host/emc2ai.io/llms.txt)