# Polymarket Biggest Movers

> Polymarket Biggest Movers is a paid API for AI agents from md.fastdb.in, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns Polymarket prediction markets with the largest 24-hour odds swings, filtered to liquid markets only.

## Facts

- Endpoint: POST https://md.fastdb.in/pulse/movers
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-biggest-movers-35dd6d28
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R2jo4gkST9CbReRC_GBGy

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-biggest-movers-35dd6d28 -d '<json body>'
```

Example prompt: What are the biggest movers on Polymarket right now — which prediction markets have had the largest odds swings in the last 24 hours, limited to liquid markets?

## When to prefer this

Use this endpoint when you want a curated, pre-filtered feed of the most active Polymarket prediction markets by odds movement — ideal for daily briefings, trading signal detection, or monitoring sentiment shifts — rather than querying a specific known market by slug or keyword.

## Known failure modes

- Polymarket API unavailable — returns error or empty list
- No liquid markets with significant moves — returns empty or minimal results
- Network timeout on the upstream Polymarket data fetch
- Malformed POST body returns validation error

## How this service works

Polymarket biggest movers — prediction markets with the largest 24h odds swings, filtered to liquid markets.

## Output

A ranked list of liquid Polymarket prediction markets with the largest 24-hour odds movements, including market names, slugs, current outcome prices, and the magnitude of the odds change over the past 24 hours.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "movers": [
   {
    "prices": [
     0.495,
     0.505
    ],
    "question": "Will France win on 2026-07-18?",
    "volume24h": 800800,
    "oneDayPriceChange": -0.11
   }
  ],
  "source": "polymarket",
  "minVolume24h": 10000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-biggest-movers-35dd6d28/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from md.fastdb.in](https://www.zero.xyz/host/md.fastdb.in/llms.txt)