# SYNTHORA DeFi Market Data Feed

> SYNTHORA DeFi Market Data Feed is a paid API for AI agents from defidata.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns perpetual open interest, funding rate, mark price, and a directional signal for top DeFi assets (BTC/ETH/SOL/etc.), with optional per-asset detail verdicts, cryptographically signed via Ed25519.

## Facts

- Endpoint: POST https://defidata.hergertsynthora.com/service
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-defi-market-data-feed-e73095c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JH37ATjF49PuefX0SCNSB

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 synthora-defi-market-data-feed-e73095c5 -d '<json body>'
```

Example prompt: Pull the latest perp market data feed from SYNTHORA — give me open interest, funding rate, mark price, and directional signal for all top assets, and include the per-asset verdict for BTC.

## When to prefer this

Choose this endpoint when you need a low-cost, cryptographically verifiable snapshot of perpetual futures market data (open interest, funding rate, mark price, directional signal) across top crypto assets; especially useful when auditability of the data source matters due to Ed25519 signing, and when integrating DeFi trading signals into automated workflows on Base.

## Known failure modes

- Invalid slug value (not 'defi-data') returns an error or empty response
- Unknown asset ticker returns no per-asset detail
- Payment failure via x402 protocol (insufficient USDC balance) blocks the request
- Limit parameter set to 0 or negative may return empty feed
- Service temporarily unavailable returns HTTP 5xx

## How this service works

DeFi market-data feed: perp open interest, funding rate, mark price and a directional signal across top assets (BTC/ETH/SOL/…), plus optional per-asset verdict. Deterministic, Ed25519-signed. $0.002 USDC via x402 on Base. SYNTHORA.

## Output

A deterministic, Ed25519-signed JSON payload containing perpetual open interest, funding rate, mark price, and a directional signal for each top asset (BTC, ETH, SOL, etc.), with an optional per-asset verdict when a specific ticker is requested.

## 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/synthora-defi-market-data-feed-e73095c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defidata.hergertsynthora.com](https://www.zero.xyz/host/defidata.hergertsynthora.com/llms.txt)