# FundingFeed — Cross-Exchange Perpetual Funding Rate Aggregator

> FundingFeed — Cross-Exchange Perpetual Funding Rate Aggregator is a paid API for AI agents from funding-feed.kaminariouji.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Aggregates live perpetual funding rates, open interest, and best bid/ask across 10+ crypto exchanges for BTC, ETH, and SOL to surface cross-venue funding arbitrage opportunities

## Facts

- Endpoint: POST https://funding-feed.kaminariouji.workers.dev/extract?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fundingfeed-cross-exchange-perpetual-funding-rate-aggregator-9bba94f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z1do8UdqfjDjadiMYYD1W

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 fundingfeed-cross-exchange-perpetual-funding-rate-aggregator-9bba94f3 -d '<json body>'
```

Example prompt: Pull the live cross-exchange funding rate data for BTC right now — I want to see the annualized funding spread across Bybit, OKX, Hyperliquid, and the other venues, plus total open interest and best bid/ask, so I can decide where to put on a cash-and-carry trade.

## When to prefer this

Choose this endpoint when you need a single aggregated view of perpetual funding rates, open interest, and best execution prices across 10+ major crypto exchanges for BTC, ETH, or SOL — especially for funding arbitrage discovery, cash-and-carry strategy timing, or smart order routing. Prefer it over querying individual exchange APIs when you need cross-venue comparison in one call.

## Known failure modes

- Upstream exchange API outage causes missing data for one or more venues
- Rate limit or payment failure returns 402 requiring USDC micropayment
- Stale funding rate data if exchange updates are delayed
- Unsupported asset symbol returns empty or error response
- Network timeout on the Cloudflare Workers edge function

## How this service works

Cross-exchange perpetual funding rate arbitrage, open interest, and best-execution for BTC/ETH/SOL. Aggregates live perpetual venues (OKX, Bybit, Gate.io, HTX, Hyperliquid, BingX, Bitget, Kraken, Coinbase, MEXC) into one call: current funding rate per venue, min/max/mean annualized funding, the cross-venue funding arbitrage spread, next funding time per venue, total open interest in USD with a per-venue breakdown, and real top-of-book best bid/ask. Use it to find the best funding rate arbitrage opportunity across exchanges, compare funding rates between Bybit and OKX for a specific coin, check annualized carry cost for a long/short funding arb, identify which exchange has the most negative funding rate right now, scan for cross-venue funding divergences in crypto perpetuals, monitor funding spreads to time a cash-and-carry strategy, detect crowded positioning from open interest, and route orders to the venue with the best price. Paid per call: 0.005 USDC on Base, Polygon, Solana or Tempo (MPP, no gas). FIRST CALL FREE per wallet — send header "X-WALLET: 0x<your Base address>" and get the full feed with no payment. Try it before you pay.

## Output

Returns a JSON object containing, per venue: current funding rate, annualized funding rate, next funding timestamp, and a per-venue open interest breakdown; plus aggregate statistics including min/max/mean annualized funding, the cross-venue funding arbitrage spread, total open interest in USD, and real top-of-book best bid/ask prices.

## 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",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com",
  "lang": "en",
  "note": "Extracted server-side from the live page.",
  "text": "Example Domain\n\nThis domain is for use in illustrative examples in documents.",
  "links": [
   {
    "url": "https://www.iana.org/domains/example",
    "text": "More information..."
   }
  ],
  "title": "Example Domain",
  "status": 200,
  "finalUrl": "https://example.com/",
  "headings": [
   {
    "text": "Example Domain",
    "level": 1
   }
  ],
  "siteName": null,
  "truncated": false,
  "wordCount": 22,
  "contentType": "text/html; charset=UTF-8",
  "description": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fundingfeed-cross-exchange-perpetual-funding-rate-aggregator-9bba94f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from funding-feed.kaminariouji.workers.dev](https://www.zero.xyz/host/funding-feed.kaminariouji.workers.dev/llms.txt)