Scan

{
  "ok": true,
  "receipt_page_url": "https://flint.network/receipts/fsr_01K3J6M2F7H8Q9R0S1T2V3W4X6",
  "receipt_url": "https://flint.network/api/settlement-receipts/fsr_01K3J6M2F7H8Q9R0S1T2V3W4X6",
  "record_id": "frv_01K3J6M2F7H8Q9R0S1T2V3W4X5",
  "record_url": "https://flint.network/records/frv_01K3J6M2F7H8Q9R0S1T2V3W4X5",
  "scan": {
    "bounded_paid_path_executed": true,
    "external_provider_calls": 0,
    "external_provider_path_executed": false,
    "model_calls": 0,
    "passport_upgraded": false,
    "payer_wallet_commitment": "sha256_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
    "profile": "marketplace_basic_v1",
    "record_persisted": true,
    "record_persistence_status": "persisted",
    "replay_protection_status": "completed",
    "status": "completed",
    "transaction_intent_commitment": "sha256_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "trust_graph_ingest_attempted": true
  },
  "score": 60,
  "service_payment": {
    "distinct_from_scanned_transaction": true,
    "purpose": "flint_transaction_scan_service_fee",
    "receipt_id": "fsr_01K3J6M2F7H8Q9R0S1T2V3W4X6",
    "receipt_status": "issued",
    "status": "settled"
  },
  "signed_record": "eyJhbGciOiJFUzI1NiJ9.record.signature",
  "verdict": "step_up"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://flint.network/api/x402/scan' \
  -H 'content-type: application/json' \
  --data-raw '{"agent_claim":{"agent_id":"procurement-agent-7","agent_runtime_hint":"x402_buyer","wallet_type":"eoa"},"nonce":"scan-01K3J6M2F7H8Q9R0S1T2V3W4X5","passport_id":"kya_optional_passport_id","timestamp":"2026-08-25T22:00:00.000Z","transaction":{"action":"stablecoin_transfer","amount_display":"24.50","chain":"eip155:8453","counterparty_address":"0x742d35Cc6634C0532925a3b844Bc454e4438f44e","reference":"invoice_123","token":{"issuer":"circle","symbol":"USDC"}}}'

# 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://flint.network/api/x402/scan' \
  -H 'content-type: application/json' \
  --data-raw '{"agent_claim":{"agent_id":"procurement-agent-7","agent_runtime_hint":"x402_buyer","wallet_type":"eoa"},"nonce":"scan-01K3J6M2F7H8Q9R0S1T2V3W4X5","passport_id":"kya_optional_passport_id","timestamp":"2026-08-25T22:00:00.000Z","transaction":{"action":"stablecoin_transfer","amount_display":"24.50","chain":"eip155:8453","counterparty_address":"0x742d35Cc6634C0532925a3b844Bc454e4438f44e","reference":"invoice_123","token":{"issuer":"circle","symbol":"USDC"}}}' \
  | 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%2Fflint.network%2Fapi%2Fx402%2Fscan&method=POST
const res = await pay("https://flint.network/api/x402/scan", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "agent_claim": {
      "agent_id": "procurement-agent-7",
      "agent_runtime_hint": "x402_buyer",
      "wallet_type": "eoa"
    },
    "nonce": "scan-01K3J6M2F7H8Q9R0S1T2V3W4X5",
    "passport_id": "kya_optional_passport_id",
    "timestamp": "2026-08-25T22:00:00.000Z",
    "transaction": {
      "action": "stablecoin_transfer",
      "amount_display": "24.50",
      "chain": "eip155:8453",
      "counterparty_address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
      "reference": "invoice_123",
      "token": {
        "issuer": "circle",
        "symbol": "USDC"
      }
    }
  }),
});
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://flint.network/api/x402/scan",
        json={
            "agent_claim": {
                "agent_id": "procurement-agent-7",
                "agent_runtime_hint": "x402_buyer",
                "wallet_type": "eoa",
            },
            "nonce": "scan-01K3J6M2F7H8Q9R0S1T2V3W4X5",
            "passport_id": "kya_optional_passport_id",
            "timestamp": "2026-08-25T22:00:00.000Z",
            "transaction": {
                "action": "stablecoin_transfer",
                "amount_display": "24.50",
                "chain": "eip155:8453",
                "counterparty_address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
                "reference": "invoice_123",
                "token": {
                    "issuer": "circle",
                    "symbol": "USDC",
                },
            },
        },
    )
    print(res.status_code, res.text)