# Polymarket Odds & Movers

> Polymarket Odds & Movers is a paid API for AI agents from patch-guard-api.me-e51.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns normalized Polymarket prediction market odds, sorted by top movers or volume, with probabilities summing to 1

## Facts

- Endpoint: POST https://patch-guard-api.me-e51.workers.dev/v1/polymarket-odds
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-odds-movers-6c35260f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7dvfm8VQH4D27XI1SGPPj

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-odds-movers-6c35260f -d '<json body>'
```

Example prompt: Show me the top 10 Polymarket markets sorted by biggest movers in the last 24 hours, but only include ones with at least $50,000 in 24h volume.

## When to prefer this

Use this endpoint when you need normalized, probability-consistent Polymarket odds (outcomes sum to 1) with 24h movement data, especially when screening for trending or high-volume markets. Prefer this over raw Polymarket API access when you need pre-normalized probabilities and ranked market discovery without building your own data pipeline. Best suited for agents monitoring prediction market sentiment or tracking event probability shifts.

## Known failure modes

- Polymarket Gamma API unavailable — returns upstream error or empty markets array
- Invalid sort value (not 'movers' or 'volume') — schema validation error
- Limit out of range (below 1 or above 20) — rejected with validation error
- minVolume24hUsd too large filters out all markets — returns empty results array
- Payment not processed (x402 flow failure) — 402 response requiring USDC payment
- Stale data if Polymarket API is delayed — asOf timestamp will reflect lag

## How this service works

Four x402-paid agent utilities: safe JSON Patch evaluation, multi-source crypto price consensus, normalized Polymarket movers, and deterministic JSON repair/canonicalization.

## Output

A JSON object with a timestamp, sort method used, and an array of up to 20 Polymarket markets each containing the question text, outcome names with normalized probabilities summing to 1, 24h directional change and percentage-point move, liquidity in USD, 24h volume in USD, market URL, end date, and methodology note explaining probability normalization.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "sort": {
   "enum": [
    "movers",
    "volume"
   ],
   "type": "string",
   "default": "movers"
  },
  "limit": {
   "type": "integer",
   "default": 10,
   "maximum": 20,
   "minimum": 1
  },
  "minVolume24hUsd": {
   "type": "number",
   "default": 0,
   "maximum": 1000000000,
   "minimum": 0
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asOf": "2026-08-08T12:00:00.000Z",
  "sort": "movers",
  "source": "Polymarket Gamma API",
  "markets": [
   {
    "id": "12345",
    "url": "https://polymarket.com/event/example-market",
    "slug": "example-market",
    "endDate": "2026-12-31T00:00:00Z",
    "outcomes": [
     {
      "name": "Yes",
      "rawPrice": 0.62,
      "probability": 0.62
     },
     {
      "name": "No",
      "rawPrice": 0.38,
      "probability": 0.38
     }
    ],
    "question": "Will the example happen?",
    "direction24h": "up",
    "liquidityUsd": 500000,
    "volume24hUsd": 125000,
    "rawProbabilitySum": 1,
    "change24hPercentagePoints": 4.5
   }
  ],
  "methodology": "Outcome token prices are divided by their sum so returned probabilities total 1."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-odds-movers-6c35260f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from patch-guard-api.me-e51.workers.dev](https://www.zero.xyz/host/patch-guard-api.me-e51.workers.dev/llms.txt)