# Hergert Synthora DeFi Data Feed

> Hergert Synthora DeFi Data Feed is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Returns real-time DeFi market data including mark price, funding rate, and open interest for top crypto assets or a single specified asset.

## Facts

- Endpoint: POST https://api.hergertsynthora.com/v1/defidata
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hergert-synthora-defi-data-feed-9fc6a5a1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kqM16aUznF-QYgpMZaY52

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 hergert-synthora-defi-data-feed-9fc6a5a1 -d '<json body>'
```

Example prompt: Pull the DeFi data feed from Hergert Synthora for the top assets and give me the mark price, funding rate, and open interest for BTC — use the defi-data slug.

## When to prefer this

Choose this endpoint when you need signed, real-time DeFi derivatives data (mark price, funding rate, open interest) for top crypto assets or a specific ticker, especially in autonomous agent workflows that require machine-verifiable (ed25519-signed) data and are already using the x402 micropayment protocol.

## Known failure modes

- Invalid or unrecognized asset ticker returns empty or error result
- Missing or incorrect slug value may return no data or an error
- Limit set too high may slow response or return partial data
- Payment failure (insufficient USDC) results in 402 response before data is returned
- Service unavailability from self-hosted infrastructure may cause timeouts

## How this service works

Garantizamos soberanía digital mediante ejecución autónoma. Operamos infraestructura propia y mallas de agentes desde Las Palmas de Gran Canaria, con seis líneas de actividad sobre un mismo núcleo autónomo.

## Output

Returns a JSON object with ok:true, a niche identifier ('defi_data'), and a result object containing a feed array of assets each with their ticker, directional signal (e.g. neutral/long/short), mark price in USD, funding rate, and open interest in USD, plus metadata including the slug, a Unix timestamp (as_of), count of assets returned, and an ed25519 signature for data integrity verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "slug": {
   "type": "string",
   "description": "Use defi-data for the top-assets feed"
  },
  "asset": {
   "type": "string",
   "description": "Ticker for single-asset detail, e.g. BTC"
  },
  "limit": {
   "type": "integer",
   "description": "Feed size (default all top assets)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "defi_data",
  "result": {
   "feed": [
    {
     "asset": "BTC",
     "signal": "neutral",
     "mark_price": 97500,
     "funding_rate": 0.000012,
     "open_interest_usd": 2209942387.46
    }
   ],
   "slug": "defi-data",
   "as_of": 1783322000,
   "count": 3,
   "signed": "ed25519"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hergert-synthora-defi-data-feed-9fc6a5a1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hergertsynthora.com](https://www.zero.xyz/host/api.hergertsynthora.com/llms.txt)