# Perpetual Futures Funding Rates API

> Perpetual Futures Funding Rates API is a paid API for AI agents from funding-rates.api.klymax402.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Retrieves current perpetual futures funding rates for a given token symbol across multiple cryptocurrency exchanges

## Facts

- Endpoint: GET https://funding-rates.api.klymax402.com/api/rates
- 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/perpetual-futures-funding-rates-api-4ed0ede4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D0J2bO5QFLQpFeckBJpG5

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 perpetual-futures-funding-rates-api-4ed0ede4
```

Example prompt: What are the current perpetual futures funding rates for BTC across exchanges?

## When to prefer this

Use this endpoint when you need real-time or near-real-time perpetual futures funding rates for a specific cryptocurrency token across multiple exchanges. Ideal for trading bots, arbitrage strategies, or dashboards that need to monitor funding rate conditions. Best suited for single-symbol lookups by ticker (e.g. BTC, ETH, SOL).

## Known failure modes

- Missing required 'symbol' query parameter returns a 400 or error response
- Unknown or unsupported token symbol may return empty data or an error
- Payment not included or insufficient (x402 protocol) results in a 402 Payment Required response
- Exchange data unavailable or stale data if upstream providers are down
- Rate limiting if too many requests are made in a short window

## How this service works

Get perpetual futures funding rates across exchanges

## Output

Returns funding rate data for the requested token symbol across multiple exchanges, including the funding rate values and associated exchange names for perpetual futures contracts.

## 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": [],
     "properties": {
      "sort": {
       "enum": [
        "abs",
        "highest",
        "lowest",
        "spread"
       ],
       "type": "string",
       "description": "Scan mode only. 'abs' = largest absolute funding first (default), 'highest' = most positive first, 'lowest' = most negative first, 'spread' = largest cross-venue gap first."
      },
      "limit": {
       "type": "number",
       "description": "Scan mode only. Number of markets to return. Default 50, max 1000."
      },
      "symbol": {
       "type": "string",
       "description": "Token symbol (e.g. BTC, ETH, SOL). Optional -- omit it to scan every market instead of one asset."
      },
      "minVenues": {
       "type": "number",
       "description": "Scan mode only. Set to 2 to keep only markets listed on both venues, which is what cross-venue carry requires. Default 1."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/perpetual-futures-funding-rates-api-4ed0ede4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from funding-rates.api.klymax402.com](https://www.zero.xyz/host/funding-rates.api.klymax402.com/llms.txt)