# SiteCheck Prediction Market Search

> SiteCheck Prediction Market Search is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Search and filter prediction markets across Polymarket and Manifold by keyword, date range, volume, and venue

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/pm/search?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-prediction-market-search-e724e0c1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JIk-2gX-GXSdNsAPNSElV

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 sitecheck-prediction-market-search-e724e0c1
```

Example prompt: Search Polymarket and Manifold for prediction markets about the Fed's next interest rate decision — show me up to 10 markets with at least $100,000 in volume closing after 2026-01-01.

## When to prefer this

Use this endpoint when you need to search for prediction market odds and questions across Polymarket and Manifold simultaneously. It is the right choice when an agent needs to gauge market sentiment or probability on political, economic, or crypto events, especially when you want to filter by volume, date range, or a specific venue. Prefer this over manually querying Polymarket or Manifold directly, since it aggregates both in one call.

## Known failure modes

- No markets match the query — returns empty markets array with count 0
- Venue unavailable — specific venue listed in venuesUnavailable field
- Invalid date format for closeAfter/closeBefore — likely returns error or ignores parameter
- Limit out of range (not 1-50) — may default to 20 or return error
- Network timeout from upstream Polymarket or Manifold APIs

## How this service works

Searches open prediction markets on Polymarket (real money, USDC) and Manifold (play money) by keywords, with optional closing-date window and minimum volume. Each row: venue, question, outcomes with prices (implied probability), volume with its unit (USD or mana), liquidity, close time and link. Results alternate between venues; up to 50 rows. Information only, not financial advice.

## Output

Returns a JSON object with a list of matching prediction markets, each including the market question, URL, venue (polymarket or manifold), current outcome prices, volume, liquidity, volume unit, and closing time. Also includes metadata about which venues were queried, which were unavailable, and a disclaimer that results are informational only.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Search words, e.g. fed, election, bitcoin"
      },
      "limit": {
       "type": "string",
       "description": "Markets to return, 1 to 50, default 20"
      },
      "venue": {
       "type": "string",
       "description": "all (default), polymarket or manifold"
      },
      "minVolume": {
       "type": "string",
       "description": "Minimum volume in the venue's own unit (USD on Polymarket, mana on Manifold)"
      },
      "closeAfter": {
       "type": "string",
       "description": "Only markets closing on or after this date, YYYY-MM-DD"
      },
      "closeBefore": {
       "type": "string",
       "description": "Only markets closing on or before this date, YYYY-MM-DD"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 10,
  "query": "fed",
  "source": "Polymarket Gamma public-search (gamma-api.polymarket.com), Manifold API (api.manifold.markets)",
  "markets": [
   {
    "id": "2589810",
    "url": "https://polymarket.com/event/fed-decision-in-october-20260617190323537",
    "slug": "will-the-fed-decrease-interest-rates-by-50-bps-after-the-october-2026-meeting-20260617190324029",
    "venue": "polymarket",
    "volume": 6627619,
    "outcomes": [
     {
      "price": 0.002,
      "outcome": "Yes"
     },
     {
      "price": 0.999,
      "outcome": "No"
     }
    ],
    "question": "Will the Fed decrease interest rates by 50+ bps after the October 2026 meeting?",
    "closeTime": "2026-10-29T03:59:00.000Z",
    "eventSlug": "fed-decision-in-october-20260617190323537",
    "liquidity": 1520688,
    "volumeUnit": "USD"
   },
   {
    "id": "hII6EUzNlU",
    "url": "https://manifold.markets/BillClintonBubba/fed-decision-in-october",
    "slug": "fed-decision-in-october",
    "venue": "manifold",
    "volume": 51101,
    "outcomes": [],
    "question": "Fed decision in October?",
    "closeTime": "2026-10-28T18:00:00.000Z",
    "eventSlug": null,
    "liquidity": 1000,
    "volumeUnit": "mana (play money)"
   },
   {
    "id": "2589811",
    "url": "https://polymarket.com/event/fed-decision-in-october-20260617190323537",
    "slug": "will-the-fed-decrease-interest-rates-by-25-bps-after-the-october-2026-meeting-20260617190324030",
    "venue": "polymarket",
    "volume": 7141895,
    "outcomes": [
     {
      "price": 0.004,
      "outcome": "Yes"
     },
     {
      "price": 0.997,
      "outcome": "No"
     }
    ],
    "question": "Will the Fed decrease interest rates by 25 bps after the October 2026 meeting?",
    "closeTime": "2026-10-29T03:59:00.000Z",
    "eventSlug": "fed-decision-in-october-20260617190323537",
    "liquidity": 848830,
    "volumeUnit": "USD"
   }
  ],
  "checkedAt": "2026-10-15T18:21:04.920Z",
  "disclaimer": "Information only, not financial advice.",
  "venuesChecked": [
   "manifold",
   "polymarket"
  ],
  "venuesUnavailable": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-prediction-market-search-e724e0c1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)