Devagentpal Human Intent Checksum

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum' \
  -H 'content-type: application/json' \
  --data-raw '{"intent":{"allowedActions":["buy:x402:wallet-snapshot"],"allowedCurrencies":["USDC"],"allowedNetworks":["base"],"allowedResources":["wallet-snapshot"],"allowedSellers":["agent-b"],"audience":"devagentpal:intent","blockedResources":[],"blockedSellers":[],"delegation":{"allowedDelegateIds":["agent-a"],"maxDepth":1},"maxSingleSpend":"0.05","maxTotalSpend":"0.10","nonce":"intent-demo-1","objective":"Allow one low-cost wallet snapshot.","principalId":"human-operator-1","privacyRules":{"allowCredentialSharing":false,"allowPersonalData":false,"allowPromptSharing":false,"allowResale":false},"prohibitedActions":["trade","transfer"],"validFrom":"2026-07-19T00:00:00.000Z","validUntil":"2026-07-20T00:00:00.000Z","version":"1"},"mode":"issue"}'

# 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/human-intent-checksum' \
  -H 'content-type: application/json' \
  --data-raw '{"intent":{"allowedActions":["buy:x402:wallet-snapshot"],"allowedCurrencies":["USDC"],"allowedNetworks":["base"],"allowedResources":["wallet-snapshot"],"allowedSellers":["agent-b"],"audience":"devagentpal:intent","blockedResources":[],"blockedSellers":[],"delegation":{"allowedDelegateIds":["agent-a"],"maxDepth":1},"maxSingleSpend":"0.05","maxTotalSpend":"0.10","nonce":"intent-demo-1","objective":"Allow one low-cost wallet snapshot.","principalId":"human-operator-1","privacyRules":{"allowCredentialSharing":false,"allowPersonalData":false,"allowPromptSharing":false,"allowResale":false},"prohibitedActions":["trade","transfer"],"validFrom":"2026-07-19T00:00:00.000Z","validUntil":"2026-07-20T00:00:00.000Z","version":"1"},"mode":"issue"}' \
  | 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 $0.05 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%2Fapi.blockchainmoneymap.com%2Fapi%2Fdevagentpal%2Fhuman-intent-checksum&method=POST
const res = await pay("https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "intent": {
      "allowedActions": [
        "buy:x402:wallet-snapshot"
      ],
      "allowedCurrencies": [
        "USDC"
      ],
      "allowedNetworks": [
        "base"
      ],
      "allowedResources": [
        "wallet-snapshot"
      ],
      "allowedSellers": [
        "agent-b"
      ],
      "audience": "devagentpal:intent",
      "blockedResources": [],
      "blockedSellers": [],
      "delegation": {
        "allowedDelegateIds": [
          "agent-a"
        ],
        "maxDepth": 1
      },
      "maxSingleSpend": "0.05",
      "maxTotalSpend": "0.10",
      "nonce": "intent-demo-1",
      "objective": "Allow one low-cost wallet snapshot.",
      "principalId": "human-operator-1",
      "privacyRules": {
        "allowCredentialSharing": false,
        "allowPersonalData": false,
        "allowPromptSharing": false,
        "allowResale": false
      },
      "prohibitedActions": [
        "trade",
        "transfer"
      ],
      "validFrom": "2026-07-19T00:00:00.000Z",
      "validUntil": "2026-07-20T00:00:00.000Z",
      "version": "1"
    },
    "mode": "issue"
  }),
});
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 $0.05 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://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum",
        json={
            "intent": {
                "allowedActions": [
                    "buy:x402:wallet-snapshot",
                ],
                "allowedCurrencies": [
                    "USDC",
                ],
                "allowedNetworks": [
                    "base",
                ],
                "allowedResources": [
                    "wallet-snapshot",
                ],
                "allowedSellers": [
                    "agent-b",
                ],
                "audience": "devagentpal:intent",
                "blockedResources": [],
                "blockedSellers": [],
                "delegation": {
                    "allowedDelegateIds": [
                        "agent-a",
                    ],
                    "maxDepth": 1,
                },
                "maxSingleSpend": "0.05",
                "maxTotalSpend": "0.10",
                "nonce": "intent-demo-1",
                "objective": "Allow one low-cost wallet snapshot.",
                "principalId": "human-operator-1",
                "privacyRules": {
                    "allowCredentialSharing": False,
                    "allowPersonalData": False,
                    "allowPromptSharing": False,
                    "allowResale": False,
                },
                "prohibitedActions": [
                    "trade",
                    "transfer",
                ],
                "validFrom": "2026-07-19T00:00:00.000Z",
                "validUntil": "2026-07-20T00:00:00.000Z",
                "version": "1",
            },
            "mode": "issue",
        },
    )
    print(res.status_code, res.text)