ToolVet
80trust / 100

Crypto Options Chain

by Options chain by expiry in Onchain & crypto

x402 APIPassing, checked 1 h ago

The options chain for a currency and expiry sorted by strike: bid, ask, mark, mark implied volatility, open interest, 24h volume and the underlying, plus the list of available expiries. Use it when an agent is pricing a strategy, finding liquid strikes or reading the volatility smile for a specific expiry.

POST
https://agent402.tools/api/crypto-options-chain
Price
$0.004
per call in USDC
Uptime
100%
last 30 days
Response time
265 ms
362 ms slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://agent402.tools/api/crypto-options-chain

Each call costs $0.004 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://agent402.tools/api/crypto-options-chain
content-type: application/json

{
  "currency": "BTC",
  "limit": 20
}

Parameters

ParameterTypeRequiredDescription
currencystringNoBTC (default) or ETH.
expirystringNoDeribit expiry label like 26DEC26; omit for the nearest expiry.
limitnumberNoRows to return (default 100, max 500).
typestringNoOptional: call or put.

Example response

The provider's example. We can't check it without paying.

Example response, 30 lines
{
  "count": 2,
  "currency": "BTC",
  "expiresAt": "2026-08-26T08:00:00.000Z",
  "expiries": [
    "26AUG26",
    "27AUG26",
    "25SEP26"
  ],
  "expiry": "26AUG26",
  "fetchedAt": "2026-08-22T12:00:00.000Z",
  "options": [
    {
      "ask": 0.008,
      "bid": 0.0065,
      "expiry": "26AUG26",
      "instrument": "BTC-26AUG26-80000-C",
      "mark": 0.0073,
      "markIv": 48.03,
      "openInterest": 12.5,
      "strike": 80000,
      "type": "call",
      "underlyingPrice": 77317.9,
      "volume24h": 3.1,
      "volume24hUsd": 1800
    }
  ],
  "source": "deribit",
  "underlyingPrice": 77317.9
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agent402.tools/api/crypto-options-chain' \
  -H 'content-type: application/json' \
  --data-raw '{"currency":"BTC","limit":20}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://agent402.tools/api/crypto-options-chain' \
  -H 'content-type: application/json' \
  --data-raw '{"currency":"BTC","limit":20}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fcrypto-options-chain&method=POST
const res = await pay("https://agent402.tools/api/crypto-options-chain", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "currency": "BTC",
    "limit": 20
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agent402.tools/api/crypto-options-chain",
        json={
            "currency": "BTC",
            "limit": 20,
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
1 h agoPassed402315 ms$0.004
5 h agoPassed402298 ms$0.004
9 h agoPassed402283 ms$0.004
14 h agoPassed402361 ms$0.004
18 h agoPassed402362 ms$0.004
Show 10 older checks
22 h agoPassed402190 ms$0.004
26 h agoPassed402265 ms$0.004
31 h agoPassed402212 ms$0.004
35 h agoPassed402213 ms$0.004
39 h agoPassed402321 ms$0.004
43 h agoPassed402749 ms$0.004
46 h agoPassed402255 ms$0.004
2 days agoPassed402254 ms$0.004
2 days agoPassed402316 ms$0.004
2 days agoPassed402191 ms$0.004