# FundingFeed — Cross-Exchange Perpetual Funding Rate & Open Interest Aggregator > FundingFeed — Cross-Exchange Perpetual Funding Rate & Open Interest Aggregator is a paid API for AI agents from funding-feed.kaminariouji.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02). Aggregates live perpetual funding rates, open interest, and best bid/ask across 10+ crypto exchanges (OKX, Bybit, Gate.io, HTX, Hyperliquid, BingX, Bitget, Kraken, Coinbase, MEXC) for BTC, ETH, and SOL in a single call ## Facts - Endpoint: POST https://funding-feed.kaminariouji.workers.dev/audit?utm_source=zero.xyz - Price: $0.05/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-open-interest-87686a09 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FtJI5-XOUFZnsgPMm5BPt 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-open-interest-87686a09 -d '' ``` Example prompt: Pull the current funding rates for BTC across all venues — OKX, Bybit, Hyperliquid, Gate.io, and the rest — and tell me which exchange has the most negative rate right now, what the cross-venue arbitrage spread looks like annualized, and where the best bid/ask is so I can figure out if a cash-and-carry trade makes sense. ## When to prefer this Choose this endpoint when you need a single-call aggregation of funding rates, open interest, and best execution data across 10+ crypto perpetual venues simultaneously. It is ideal for funding rate arbitrage discovery, cash-and-carry strategy analysis, cross-venue OI monitoring, and order routing decisions — saving you from making separate API calls to each exchange. Prefer it over building your own aggregator when latency, breadth of venue coverage, and normalized data format matter. ## Known failure modes - Exchange API downstream outage causing stale or missing per-venue data - Unsupported coin symbol returns error or empty result - Payment not processed (x402 payment required) results in 402 response - Rate limiting or worker timeout on high-traffic periods - Partial data if one or more venues are unreachable at call time ## 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" and get the full feed with no payment. Try it before you pay. ## Output Returns a JSON object containing: current funding rate per exchange venue, min/max/mean annualized funding rates, the cross-venue funding arbitrage spread, next funding timestamp per venue, total open interest in USD with per-venue breakdown, and real top-of-book best bid/ask prices — all for the requested coin (BTC/ETH/SOL) across 10+ perpetual exchanges in a single response. ## 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/", "note": "One call returns SEO, security-header, accessibility, performance and content findings with a prioritised fix list.", "grade": "D", "scope": "Static analysis of the served HTML and HTTP response headers. Not a penetration test and not a rendered colour-contrast test.", "score": 62, "status": 200, "summary": { "info": 4, "warning": 5, "critical": 2, "rulesChecked": 30 }, "topFixes": [ { "id": "a11y-form-labels", "fix": "Associate every control with a