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Hergert Synthora Open Interest API
x402
Hergert Synthora Open Interest API is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).
Returns perpetual futures open interest, mark price, and funding rate for a given crypto asset (or top-10 by OI), with an ed25519-signed signal.
Price / call$0.1
Success—
StatusUnknown
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
A JSON object containing: asset symbol, directional signal (e.g. neutral/bullish/bearish), mark price in USD, funding rate as a decimal, open interest in USD, and an ed25519 cryptographic signature over the result for authenticity verification.
Example use cases
Pre-trade perp market check
“Before I open a long on ETH perps, what's the current open interest, funding rate, and market signal for ETH?”
Top assets by open interest scan
“Show me the top 10 crypto perpetuals ranked by open interest right now, with their mark prices and funding rates.”
Funding rate arbitrage monitoring
“I want to check the current funding rate and open interest signal for SOL perps — is it worth being long or short given the funding?”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/openinterestWhen to prefer
Choose this endpoint when you need a cryptographically signed open interest snapshot for crypto perpetuals — especially when you require an authentic, tamper-evident result (ed25519 signature) alongside mark price and funding rate in a single call. Prefer this over generic market data APIs when operating in an autonomous agent context where signed provenance of market data matters.
Side effects
- Unknown or unsupported asset symbol returns an error
- Network or infrastructure downtime at the Las Palmas origin
- Payment failure (insufficient USDC balance for x402 microtransaction)
- Malformed request body returns validation error
- Rate limiting or quota exhaustion
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| asset | string | Perp symbol e.g. BTC, ETH, SOL. Omit for top-10 by OI |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "open_interest",
"result": {
"asset": "BTC",
"signal": "neutral",
"signed": "ed25519",
"mark_price": 97500,
"funding_rate": 0.0000125,
"open_interest_usd": 2260000000
}
}
}Tags
x402
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