Signals Explain

{
  "asset": "BTC",
  "day": "2026-06-18",
  "explanation": {
    "composite": {
      "comp_version": "v3",
      "rank": 4,
      "score": 0.42
    },
    "factor_scores": [
      {
        "class": "TR",
        "horizon": "14d",
        "t_score": 1.42
      },
      {
        "class": "TR",
        "horizon": "30d",
        "t_score": 1.18
      },
      {
        "class": "VOL",
        "horizon": "7d",
        "t_score": -0.31
      },
      {
        "class": "FLOW",
        "horizon": "14d",
        "t_score": 0.62
      },
      {
        "class": "FUT",
        "horizon": "1d",
        "t_score": 0.08
      }
    ]
  },
  "ok": true,
  "signal_id": "TR_MOMO_CONT_14D"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://cryptyx.ai/api/signals/explain?asset=&day=&signal_id='

# 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 - 'https://cryptyx.ai/api/signals/explain?asset=&day=&signal_id=' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcryptyx.ai%2Fapi%2Fsignals%2Fexplain
const res = await pay("https://cryptyx.ai/api/signals/explain?asset=&day=&signal_id=");
console.log(res.status, await res.text());

# 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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://cryptyx.ai/api/signals/explain?asset=&day=&signal_id=")
    print(res.status_code, res.text)