# Prediction Market Event (Multi-Outcome) – Polymarket

> Prediction Market Event (Multi-Outcome) – Polymarket is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns a ranked probability list of all outcomes for a multi-outcome Polymarket event (e.g. all candidates in an election) given the event slug.

## Facts

- Endpoint: GET https://www.x402financialdata.com/prediction-market-event/:slug
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prediction-market-event-multi-outcome-polymarket-db43cd73
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dT_4I5WDBrscNwjNdPLw7

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 prediction-market-event-multi-outcome-polymarket-db43cd73
```

Example prompt: Pull the full ranked probability list for every candidate in the next-prime-minister-of-ethiopia Polymarket event — I want all outcomes in one go, not individual binary markets.

## When to prefer this

Use this endpoint when you need a single, unified probability ranking across all outcomes of a multi-outcome Polymarket event — such as elections with many candidates — and want to avoid manually fetching and aggregating individual binary markets via a search endpoint. Prefer this over the /prediction-markets search route when you already know the exact event slug and need a clean ranked list in one call.

## Known failure modes

- Invalid or misspelled event slug returns a 404 or empty result
- Event slug refers to a binary market rather than a multi-outcome event, returning incomplete data
- Polymarket event has been resolved or delisted, returning stale or no data
- Rate limiting or payment failure results in a 402 or 429 error
- Slug format mismatch (e.g. using spaces instead of hyphens) causes lookup failure

## How this service works

A full multi-outcome Polymarket event (e.g. every candidate in an election) as one ranked probability list, by exact event slug -- instead of stitching together each candidate's individual binary market via /prediction-markets search. Polymarket-only. $0.01/call.

## Output

A ranked list of all outcomes for the specified Polymarket event, each with its current implied probability, ordered from most to least likely. Includes event-level metadata such as the event title and slug. Replaces the need to call individual binary markets and stitch them together manually.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "slug"
     ],
     "properties": {
      "slug": {
       "type": "string",
       "description": "Polymarket event slug, e.g. next-prime-minister-of-ethiopia"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prediction-market-event-multi-outcome-polymarket-db43cd73/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.x402financialdata.com](https://www.zero.xyz/host/www.x402financialdata.com/llms.txt)