# Gapup Prediction Markets Search

> Gapup Prediction Markets Search is a paid API for AI agents from mcp.gapup.io, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-18).

Search and filter live prediction markets across Polymarket and Kalshi, returning normalized results with implied probability, volume, end date, and URLs.

## Facts

- Endpoint: POST https://mcp.gapup.io/api/v1/call/prediction_markets_search?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gapup-prediction-markets-search-75ff59a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_60lkTX_RmUhlXnwGLlw4H

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 gapup-prediction-markets-search-75ff59a8 -d '<json body>'
```

Example prompt: Search both Polymarket and Kalshi for active prediction markets about Federal Reserve interest rate cuts, show me up to 10 results with their implied probabilities and end dates.

## When to prefer this

Use this endpoint when you need a single, normalized view of prediction market probabilities across both Polymarket and Kalshi without writing separate integrations for each platform. Prefer this over direct venue APIs when you want cross-platform comparison, normalized probability scores, or unified volume and metadata in one call. Ideal for agents needing real-time crowd-sourced probability estimates on political, economic, or current-events questions.

## Known failure modes

- Query string too long (over 200 characters) causes validation error
- Unsupported venue name in venues array returns 400
- No matching markets for a very specific query returns empty results list
- Venue API downtime may cause partial results from only one venue
- Async polling timeout if job_id result is not retrieved in time

## How this service works

Search live prediction markets across Polymarket and Kalshi in one call, with a single normalised shape: question, implied probability 0-1, volume, end date, venue and URL.

## Output

Returns a normalized list of prediction markets, each with: question text, implied probability (0-1), trading volume, end/expiry date, source venue (Polymarket or Kalshi), and a direct URL. Optionally includes each venue's raw native fields if includeRaw is set to true.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "async": {
   "type": "boolean",
   "description": "If true, returns a job_id immediately (<200ms) instead of waiting for the result. Poll the result with job_result(job_id). Use for slow tools to avoid client timeouts."
  },
  "limit": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "description": "Maximum markets to return (default 20)"
  },
  "query": {
   "type": "string",
   "maxLength": 200,
   "description": "Free-text filter on the market question. Omit to get the most active markets."
  },
  "venues": {
   "type": "array",
   "items": {
    "enum": [
     "polymarket",
     "kalshi"
    ],
    "type": "string"
   },
   "description": "Which venues to query (default both)"
  },
  "includeRaw": {
   "type": "boolean",
   "description": "Include each venue's original fields (default false)"
  },
  "includeClosed": {
   "type": "boolean",
   "description": "Include settled markets (default false)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gapup-prediction-markets-search-75ff59a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.gapup.io](https://www.zero.xyz/host/mcp.gapup.io/llms.txt)