# HALOWERK marktwerk – Perpetual Funding Rates

> HALOWERK marktwerk – Perpetual Funding Rates is a paid API for AI agents from markt.halowerk.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Fetches current and predicted perpetual swap funding rates from Binance USDⓈ-M Futures, Bybit, and OKX for a given BASE/QUOTE pair, normalised to annualised percentages with settlement interval context.

## Facts

- Endpoint: POST https://markt.halowerk.com/funding
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-marktwerk-perpetual-funding-rates-4bff901b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mvIO6Xcx8gvSvtCU3MAVf

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 halowerk-marktwerk-perpetual-funding-rates-4bff901b -d '<json body>'
```

Example prompt: Can you pull the current and predicted funding rates for BTC/USDT across Binance futures, Bybit, and OKX — and show me the annualised percentage for each so I can compare carry costs?

## When to prefer this

Use this endpoint when you need accurate, normalised, cross-exchange perpetual funding rate data for a specific pair. It is uniquely suited for comparing carry costs across Binance USDⓈ-M Futures, Bybit linear, and OKX swaps simultaneously, with proper annualisation that accounts for each exchange's actual settlement interval — something raw exchange APIs do not standardise. Prefer it over direct exchange APIs when you need apples-to-apples annualised rate comparisons or when you need to handle the case where an exchange does not publish a predicted rate (null-safe design).

## Known failure modes

- Unknown or unsupported trading symbol returns an error or empty result
- Requested venue does not list the given pair as a perpetual (no contract found)
- Exchange API is temporarily unavailable — partial results may be returned for other venues
- Malformed symbol format (not matching BASE/QUOTE pattern) triggers input validation error
- All three exchanges down simultaneously would return a failure with no rate data

## How this service works

Reads the public perpetual data of Binance USDⓈ-M Futures, Bybit linear and OKX swaps for one BASE/QUOTE pair. Settlement intervals differ per exchange and per contract, so annualized_pct is only computed after normalising to the interval that exchange actually uses, and the formula is part of the answer. current_rate and predicted_rate are strictly separate: where an exchange publishes no forecast, predicted_rate stays null and the reason is named instead of reusing the current rate. next_settl

## Output

Returns per-exchange objects for each requested venue containing: current_rate (live funding rate), predicted_rate (exchange-published forecast or null with a named reason), annualized_pct (normalised to annualised percentage using the exchange's actual settlement interval), the annualisation formula used, the settlement interval, and the next settlement timestamp. Where a venue does not publish a forecast, predicted_rate is explicitly null with an explanation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "symbol": {
   "type": "string",
   "pattern": "^[A-Za-z0-9]{2,15}/[A-Za-z0-9]{2,15}$",
   "description": "Perpetual as BASE/QUOTE, for example BTC/USDT. Most perpetuals are quoted in USDT."
  },
  "venues": {
   "type": "array",
   "items": {
    "enum": [
     "binance-futures",
     "bybit",
     "okx"
    ],
    "type": "string"
   },
   "maxItems": 3,
   "minItems": 1,
   "description": "Perpetual venues to query. Without it all connected ones are used.",
   "uniqueItems": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-marktwerk-perpetual-funding-rates-4bff901b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from markt.halowerk.com](https://www.zero.xyz/host/markt.halowerk.com/llms.txt)