ToolVet
78trust / 100

Signals Simulate

by CRYPTYX in Onchain & crypto

x402 APIPassing, checked 2 h ago

Pre-flight threshold simulator — count how many assets would trigger at a proposed cutoff for one anchor day, with current vs proposed threshold and estimated trigger rate. Use before forking parameters. Runs across 200+ digital assets — BTC, ETH, SOL, top-cap + long-tail coverage.

POST
https://cryptyx.ai/api/signals/simulate
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
278 ms
478 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://cryptyx.ai/api/signals/simulate

Each call costs $0.05 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://cryptyx.ai/api/signals/simulate
content-type: application/json

{
  "asof_day": "",
  "signal_id": "",
  "threshold_key": "",
  "threshold_value": 0
}

Parameters

ParameterTypeRequiredDescription
asof_daystringNoOptional YYYY-MM-DD lookup day. Defaults to metrics.aligned_day_1d()
signal_idstringYesAtomic signal registry ID, uppercased server-side (e.g. TR_MOMO_CONT_14D, FLOW_ACCUM_NETUSD_7D, VOL_COMPRESSION_7v30)
threshold_keystringYesParameter name to simulate (e.g. t_thr, z_thr). Used to fetch current_threshold from signals.signal_params for comparison
threshold_valuenumberYesProposed cutoff value. Interpreted as z-score for most signals, t-score for TR_MOMO_* signals

Example response

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

{
  "asof_day": "2026-06-18",
  "current_threshold": 0.5,
  "estimated_trigger_pct": 11.62,
  "estimated_trigger_rate": 0.1162,
  "n_total": 198,
  "n_triggered": 23,
  "ok": true,
  "proposed_threshold": 0.6,
  "signal_id": "TR_MOMO_CONT_14D",
  "threshold_key": "t_thr"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://cryptyx.ai/api/signals/simulate' \
  -H 'content-type: application/json' \
  --data-raw '{"asof_day":"","signal_id":"","threshold_key":"","threshold_value":0}'

# 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://cryptyx.ai/api/signals/simulate' \
  -H 'content-type: application/json' \
  --data-raw '{"asof_day":"","signal_id":"","threshold_key":"","threshold_value":0}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcryptyx.ai%2Fapi%2Fsignals%2Fsimulate&method=POST
const res = await pay("https://cryptyx.ai/api/signals/simulate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "asof_day": "",
    "signal_id": "",
    "threshold_key": "",
    "threshold_value": 0
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://cryptyx.ai/api/signals/simulate",
        json={
            "asof_day": "",
            "signal_id": "",
            "threshold_key": "",
            "threshold_value": 0,
        },
    )
    print(res.status_code, res.text)

Security scan

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