Options chain by expiry

Options chain for a currency and expiry on Deribit, sorted by strike: instrument, strike, call/put, bid, ask, mark, mark IV, open interest, 24h volume and underlying price for each listed option, plus the list of available expiries. Send POST /api/crypto-options-chain with no required fields (4 optional) and pay $0.004 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, currency, expiry, expiresAt, underlyingPrice and 4 more.

Omit expiry to get the nearest one; pass type call or put to filter one side. limit caps rows (default 100, max 500). Keyless public data.

Category: Crypto & onchain data · Tags: crypto crypto-options derivatives options options-chain strikes implied-volatility bitcoin

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/crypto-options-chain \
  -H "Content-Type: application/json" \
  -d '{"currency":"BTC","limit":20}'

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

Example response

{
  "source": "deribit",
  "currency": "BTC",
  "expiry": "26AUG26",
  "expiresAt": "2026-08-26T08:00:00.000Z",
  "underlyingPrice": 77317.9,
  "expiries": [
    "26AUG26",
    "27AUG26",
    "25SEP26"
  ],
  "count": 2,
  "options": [
    {
      "instrument": "BTC-26AUG26-80000-C",
      "expiry": "26AUG26",
      "strike": 80000,
      "type": "call",
      "bid": 0.0065,
      "ask": 0.008,
      "mark": 0.0073,
      "markIv": 48.03,
      "openInterest": 12.5,
      "volume24h": 3.1,
      "volume24hUsd": 1800,
      "underlyingPrice": 77317.9
    }
  ],
  "fetchedAt": "2026-08-22T12:00:00.000Z"
}

From an MCP client

catalog.call {
  "slug": "crypto-options-chain",
  "params": {
    "currency": "BTC",
    "limit": 20
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for crypto-options-chain; 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 issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/crypto-options-chain 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/crypto-options-chain", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "currency": "BTC",
    "limit": 20
  }),
});

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