Devagentpal Recursive Commerce Loop Breaker

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.blockchainmoneymap.com/api/devagentpal/recursive-commerce-loop-breaker' \
  -H 'content-type: application/json' \
  --data-raw '{"currentAgentId":"agent-a","delegationPath":[{"agentId":"agent-a","parentAgentId":null,"wallet":"0x3cb6ad0990015522e60e21780f2802e2E927c08A"}],"policy":{"maxCycleLength":8,"maxDelegationDepth":8,"maxFanOut":20,"maxProjectedSpend":"0.10","maxProjectionIterations":10,"maxRepeatedFingerprint":2,"maxRepeatedResource":3,"windowSeconds":3600},"principalAgentId":"agent-a","proposedPurchase":{"amount":"0.01","buyerAgentId":"agent-a","buyerWallet":"0x3cb6ad0990015522e60e21780f2802e2E927c08A","currency":"USDC","network":"base","requestFingerprint":"req-abc","resourceId":"wallet-snapshot","sellerAgentId":"agent-b","sellerWallet":"0x787fD1dc3b533171781e4Ae1A563c1AC7b4435E4","timestamp":"2026-07-19T12:00:00.000Z"},"purchaseHistory":[]}'

# 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://api.blockchainmoneymap.com/api/devagentpal/recursive-commerce-loop-breaker' \
  -H 'content-type: application/json' \
  --data-raw '{"currentAgentId":"agent-a","delegationPath":[{"agentId":"agent-a","parentAgentId":null,"wallet":"0x3cb6ad0990015522e60e21780f2802e2E927c08A"}],"policy":{"maxCycleLength":8,"maxDelegationDepth":8,"maxFanOut":20,"maxProjectedSpend":"0.10","maxProjectionIterations":10,"maxRepeatedFingerprint":2,"maxRepeatedResource":3,"windowSeconds":3600},"principalAgentId":"agent-a","proposedPurchase":{"amount":"0.01","buyerAgentId":"agent-a","buyerWallet":"0x3cb6ad0990015522e60e21780f2802e2E927c08A","currency":"USDC","network":"base","requestFingerprint":"req-abc","resourceId":"wallet-snapshot","sellerAgentId":"agent-b","sellerWallet":"0x787fD1dc3b533171781e4Ae1A563c1AC7b4435E4","timestamp":"2026-07-19T12:00:00.000Z"},"purchaseHistory":[]}' \
  | 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%2Fapi.blockchainmoneymap.com%2Fapi%2Fdevagentpal%2Frecursive-commerce-loop-breaker&method=POST
const res = await pay("https://api.blockchainmoneymap.com/api/devagentpal/recursive-commerce-loop-breaker", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "currentAgentId": "agent-a",
    "delegationPath": [
      {
        "agentId": "agent-a",
        "parentAgentId": null,
        "wallet": "0x3cb6ad0990015522e60e21780f2802e2E927c08A"
      }
    ],
    "policy": {
      "maxCycleLength": 8,
      "maxDelegationDepth": 8,
      "maxFanOut": 20,
      "maxProjectedSpend": "0.10",
      "maxProjectionIterations": 10,
      "maxRepeatedFingerprint": 2,
      "maxRepeatedResource": 3,
      "windowSeconds": 3600
    },
    "principalAgentId": "agent-a",
    "proposedPurchase": {
      "amount": "0.01",
      "buyerAgentId": "agent-a",
      "buyerWallet": "0x3cb6ad0990015522e60e21780f2802e2E927c08A",
      "currency": "USDC",
      "network": "base",
      "requestFingerprint": "req-abc",
      "resourceId": "wallet-snapshot",
      "sellerAgentId": "agent-b",
      "sellerWallet": "0x787fD1dc3b533171781e4Ae1A563c1AC7b4435E4",
      "timestamp": "2026-07-19T12:00:00.000Z"
    },
    "purchaseHistory": []
  }),
});
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.post(
        "https://api.blockchainmoneymap.com/api/devagentpal/recursive-commerce-loop-breaker",
        json={
            "currentAgentId": "agent-a",
            "delegationPath": [
                {
                    "agentId": "agent-a",
                    "parentAgentId": None,
                    "wallet": "0x3cb6ad0990015522e60e21780f2802e2E927c08A",
                },
            ],
            "policy": {
                "maxCycleLength": 8,
                "maxDelegationDepth": 8,
                "maxFanOut": 20,
                "maxProjectedSpend": "0.10",
                "maxProjectionIterations": 10,
                "maxRepeatedFingerprint": 2,
                "maxRepeatedResource": 3,
                "windowSeconds": 3600,
            },
            "principalAgentId": "agent-a",
            "proposedPurchase": {
                "amount": "0.01",
                "buyerAgentId": "agent-a",
                "buyerWallet": "0x3cb6ad0990015522e60e21780f2802e2E927c08A",
                "currency": "USDC",
                "network": "base",
                "requestFingerprint": "req-abc",
                "resourceId": "wallet-snapshot",
                "sellerAgentId": "agent-b",
                "sellerWallet": "0x787fD1dc3b533171781e4Ae1A563c1AC7b4435E4",
                "timestamp": "2026-07-19T12:00:00.000Z",
            },
            "purchaseHistory": [],
        },
    )
    print(res.status_code, res.text)