# 4SEC Extreme Funding Rate Scanner

> 4SEC Extreme Funding Rate Scanner is a paid API for AI agents from api.foursec.xyz, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).

Returns a list of crypto assets with extreme funding rates across multiple DEXs, along with the threshold and total count of extreme cases

## Facts

- Endpoint: GET https://api.foursec.xyz/funding-rate/extreme
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/4sec-extreme-funding-rate-scanner-305bcfb7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XtWFUiIPeOkVhFluePIUL

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 4sec-extreme-funding-rate-scanner-305bcfb7
```

Example prompt: Show me all crypto assets with extreme funding rates right now across DEXs — I want to know which tokens are at the threshold and how many total are flagged.

## When to prefer this

Choose this endpoint when you need a pre-filtered, aggregated view of only the most extreme funding rate conditions across multiple DEXs in real time, rather than pulling all funding rates and filtering yourself. It is especially useful for risk monitoring, arbitrage scanning, or alerting workflows where you only care about outliers. Prefer this over general market data endpoints when your specific need is funding rate extremes, not price or volume data.

## Known failure modes

- Payment not provided or insufficient USDC balance via x402 protocol returns 402 Payment Required
- Invalid or malformed query parameters return a 400 Bad Request
- Service temporarily unavailable or upstream DEX data outage returns 503
- No assets currently meet the extreme threshold, returning an empty data array with total_extreme of 0

## How this service works

Real-time multi-DEX aggregated crypto market data. Pay per request with USDC on Base via x402 protocol.

## Output

Returns a JSON object containing an array of crypto asset data items with extreme funding rates, the numeric threshold used to define 'extreme', and an integer count of total assets currently meeting that extreme threshold condition.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "data": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "threshold": {
   "type": "number"
  },
  "total_extreme": {
   "type": "integer"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/4sec-extreme-funding-rate-scanner-305bcfb7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.foursec.xyz](https://www.zero.xyz/host/api.foursec.xyz/llms.txt)