# Crypto Funding Rates by Symbol

> Crypto Funding Rates by Symbol is a paid API for AI agents from skinwinking.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Returns current perpetual futures funding rates and open interest across major venues for a given crypto asset symbol.

## Facts

- Endpoint: GET https://skinwinking.com/api/v1/data/funding-rates?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-funding-rates-by-symbol-ecb2583c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_A-rJ3pCrgTXA8z4gN0_9M

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 crypto-funding-rates-by-symbol-ecb2583c
```

Example prompt: What's the current perpetual futures funding rate for BTC across major venues — and what's the open interest in USD?

## When to prefer this

Choose this endpoint when you need real-time perpetual futures funding rates and open interest across multiple venues for a specific crypto asset, especially when you want cross-exchange comparison in a single call. Ideal for trading agents, sentiment analysis workflows, or arbitrage scanners that need raw funding rate data without building exchange integrations from scratch.

## Known failure modes

- Missing or invalid symbol parameter returns a 400 error
- Unknown or unsupported symbol returns empty venues array
- Payment not received or insufficient USDC triggers x402 payment-required response
- Venue data temporarily unavailable may result in partial or stale results

## How this service works

50 pay-per-call tools for agents over x402 (USDC on Base, Polygon, Solana): crypto market data, token audits, indicators, swap routing, web extraction, DNS/WHOIS/email checks, FX, weather and AI text/image tools.

## Output

Returns an array of venue objects each containing the exchange name, current funding rate (e.g. 0.0001), annualized percentage (e.g. 10.95%), and open interest in USD (e.g. $4.9B) for the requested symbol.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Base asset, e.g. BTC, ETH, SOL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "venues": [
   {
    "venue": "bybit",
    "fundingRate": 0.0001,
    "annualizedPct": 10.95,
    "openInterestUsd": 4900000000
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-funding-rates-by-symbol-ecb2583c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from skinwinking.com](https://www.zero.xyz/host/skinwinking.com/llms.txt)