# Coin Railz Polymarket Odds Lookup

> Coin Railz Polymarket Odds Lookup is a paid API for AI agents from coinrailz.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-15).

Fetches current odds and probability for a specific Polymarket prediction market event

## Facts

- Endpoint: POST https://coinrailz.com/x402/polymarket-odds
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coin-railz-polymarket-odds-lookup-0322652e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qYXaGgYtyeHxEFa3q5NgA

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 coin-railz-polymarket-odds-lookup-0322652e -d '<json body>'
```

Example prompt: What are the current odds on Polymarket for the 2024 US presidential election market — give me the probability and latest data for that specific event.

## When to prefer this

Use this endpoint when you need real-time odds or probability data for a specific, already-known Polymarket event. Prefer this over the search endpoint when you already have the event identifier and want precise, current market data for that single event rather than browsing multiple markets.

## Known failure modes

- Invalid or unrecognized Polymarket event ID returns an error
- Event no longer active or resolved returns stale or empty data
- Payment of 0.5 USDC not completed results in 402 payment required error
- Rate limiting or network issues may cause timeout

## How this service works

Get current odds and probability for a specific Polymarket prediction event

## Output

Returns a JSON object containing the current odds and probability for the specified Polymarket event, along with the service name, a success flag, and a timestamp of when the data was retrieved.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Query parameter for the service"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "application/json",
 "format": "json",
 "example": {
  "result": "Service executed successfully",
  "service": "polymarket-odds",
  "success": true,
  "timestamp": "2026-02-07T01:50:12.308Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coin-railz-polymarket-odds-lookup-0322652e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinrailz.com](https://www.zero.xyz/host/coinrailz.com/llms.txt)