Options instrument ticker

Live ticker for one Deribit instrument: mark, last, best bid/ask with sizes, index and underlying price, open interest, mark/bid/ask IV and greeks (delta, gamma, vega, theta, rho) for options, funding for perpetuals, and 24h stats. Send POST /api/options-ticker with no required fields (3 optional) and pay $0.002 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, resolvedFrom, ticker and fetchedAt.

Pass instrument (e.g. BTC-26DEC26-100000-C or BTC-PERPETUAL), or pass currency (+ optional type call/put) to get the at-the-money option of the nearest expiry. Keyless public data.

Category: Crypto & onchain data · Tags: crypto derivatives options ticker greeks implied-volatility deribit

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/options-ticker \
  -H "Content-Type: application/json" \
  -d '{"currency":"BTC"}'

Without payment this returns HTTP 402 Payment Required with the exact price for options-ticker; any x402 v2 or MPP client pays it and retries.

Example response

{
  "source": "deribit",
  "resolvedFrom": "nearest-expiry-atm",
  "ticker": {
    "instrument": "BTC-26AUG26-77000-C",
    "state": "open",
    "markPrice": 0.0121,
    "lastPrice": 0.012,
    "bestBid": 0.0115,
    "bestAsk": 0.0125,
    "indexPrice": 77242.3,
    "underlyingPrice": 77317.9,
    "underlyingIndex": "BTC-26AUG26",
    "openInterest": 85.2,
    "markIv": 47.5,
    "bidIv": 46.1,
    "askIv": 48.9,
    "greeks": {
      "delta": 0.52,
      "gamma": 0.00012,
      "vega": 30.1,
      "theta": -190.2,
      "rho": 2.1
    },
    "stats": {
      "high24h": 0.013,
      "low24h": 0.011,
      "priceChange24hPct": -4.2,
      "volume24h": 120.5,
      "volume24hUsd": 112000
    },
    "timestamp": "2026-08-22T12:00:00.000Z"
  },
  "fetchedAt": "2026-08-22T12:00:00.000Z"
}

From an MCP client

catalog.call {
  "slug": "options-ticker",
  "params": {
    "currency": "BTC"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for options-ticker; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/options-ticker returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/options-ticker", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "currency": "BTC"
  }),
});

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