# Kalshi Markets Search

> Kalshi Markets Search is a paid API for AI agents from polymarketeer.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15, last successful call 2026-04-15).

Search Kalshi prediction markets by keyword with optional category filtering

## Facts

- Endpoint: POST https://polymarketeer.vercel.app/api/x402/kalshi/markets/search
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Last successful call: 2026-04-15
- Success rate: 20% of calls made through Zero
- Activations on Zero: 20
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarketeer-vercel-app-9e8d8ed6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9IFJEDCimgTnfPOKWP5mE

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 polymarketeer-vercel-app-9e8d8ed6 -d '<json body>'
```

Example prompt: Search Kalshi for prediction markets about Federal Reserve interest rate decisions, filtering by the economics category.

## When to prefer this

Use this endpoint when you need to discover or search Kalshi-specific prediction markets by topic or keyword, especially when you want to filter by Kalshi's native category system. Prefer this over Polymarket search endpoints when the user specifically wants Kalshi markets or wants to compare liquidity/availability across platforms.

## Known failure modes

- No markets found matching the keyword — returns empty results
- Invalid category filter — returns error or empty list
- Payment not processed — 402 payment required error
- Keyword too vague — returns large unfiltered result set
- Kalshi API unavailable — upstream service error

## How this service works

Search Kalshi prediction markets by keyword with category filtering

## Output

A list of matching Kalshi prediction markets including market tickers, titles, categories, and relevant trading metadata that match the search keyword and optional category filter.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "data"
 ],
 "properties": {
  "data": {},
  "error": {
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarketeer-vercel-app-9e8d8ed6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarketeer.vercel.app](https://www.zero.xyz/host/polymarketeer.vercel.app/llms.txt)