# Polymarket Market Odds by Slug

> Polymarket Market Odds by Slug is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns outcomes, probabilities, trading volume, and liquidity for a specific Polymarket prediction market identified by its slug

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/predict/market
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-market-odds-by-slug-f7771004
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5juIeamzXWBTjRS8ToI7f

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 polymarket-market-odds-by-slug-f7771004 -d '<json body>'
```

Example prompt: What are the current odds and outcome probabilities on the Polymarket market with slug 'will-donald-trump-win-the-2024-us-presidential-election', including volume and liquidity?

## When to prefer this

Use this endpoint when you know the exact Polymarket market slug and need detailed outcome probabilities, volume, and liquidity for that specific market. Prefer this over the search endpoint when you already have the slug and want precise market data rather than searching by keyword.

## Known failure modes

- Invalid or misspelled slug returns a 404 or empty result
- Market no longer active or resolved returns stale or empty data
- Network timeout or upstream Polymarket API unavailability
- Payment failure (insufficient USDC balance) results in 402 response

## How this service works

Odds for a specific Polymarket market by slug: outcomes, probabilities, volume, liquidity. Send { slug }.

## Output

Returns a structured object with all outcomes for the specified Polymarket market, each with its implied probability, plus aggregate trading volume and liquidity metrics for the market.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "slug"
 ],
 "properties": {
  "slug": {
   "type": "string",
   "description": "Market slug from a predict/odds url"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-market-odds-by-slug-f7771004/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)