Mempool Anomaly

{
  "chain": "ethereum",
  "domain": "mempool",
  "gas": {
    "base_fee_gwei": 12.1,
    "current_gwei": 45.2,
    "median_20block_gwei": 14.5,
    "ratio_vs_median": 3.12
  },
  "novelty": "high",
  "peak_window": [
    "GAS_SPIKE",
    "BIG_SWAP",
    "WHALE_PENDING",
    "MEV_SIGNAL",
    "PENDING_NORMAL"
  ],
  "pending_count": 247,
  "pending_stats": {
    "big_swaps": 3,
    "contract_deploys": 2,
    "total_value_eth": 1823.5,
    "whale_pending": 1
  },
  "sequence_score": 72,
  "story": "MEV Attack"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://anomaly.forgemesh.io/api/mempool-anomaly?chain=ethereum'

# 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://anomaly.forgemesh.io/api/mempool-anomaly?chain=ethereum' \
  | 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%2Fanomaly.forgemesh.io%2Fapi%2Fmempool-anomaly
const res = await pay("https://anomaly.forgemesh.io/api/mempool-anomaly?chain=ethereum");
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://anomaly.forgemesh.io/api/mempool-anomaly?chain=ethereum")
    print(res.status_code, res.text)