Signals Grid Health Score

{
  "best_pair_detail": {
    "cycles": 4,
    "exchange": "kraken",
    "pair": "ATOMUSD",
    "total_pnl": 1.19
  },
  "best_performing_pair": "kraken:ATOMUSD",
  "cached_at": "2026-06-13T12:00:00+00:00",
  "exchange_stats": {
    "hl": {
      "active_pairs": 5,
      "avg_pnl_per_cycle_24h": 0.084,
      "cycle_velocity_per_hour": 1.58,
      "inventory_utilization_pct": 72,
      "recent_fills_24h": 38,
      "recent_pnl_24h": 3.2,
      "total_cycles": 1212
    },
    "kraken": {
      "active_pairs": 3,
      "avg_pnl_per_cycle_24h": 0.205,
      "cycle_velocity_per_hour": 0.17,
      "inventory_utilization_pct": 68,
      "recent_fills_24h": 4,
      "recent_pnl_24h": 0.82,
      "total_cycles": 25
    }
  },
  "health_score": 72,
  "interpretation": "Grid health score 72/100 — 1.9 fills/hr across all exchanges, best pair: ATOMUSD on kraken",
  "total_cycle_velocity_per_hour": 1.92,
  "total_pnl_24h_usd": 4.22
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://apexrunner.ai/signals/grid-health-score'

# 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://apexrunner.ai/signals/grid-health-score' \
  | 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 $0.007 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.007" });
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 $0.007 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapexrunner.ai%2Fsignals%2Fgrid-health-score
const res = await pay("https://apexrunner.ai/signals/grid-health-score");
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 $0.007 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.007"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://apexrunner.ai/signals/grid-health-score")
    print(res.status_code, res.text)