Prove

{
  "block_number": 25000000,
  "calldata": "0x",
  "claims": {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "balance_proof_type": "rpc_attestation",
    "balance_qualifier_met": true,
    "min_balance_tier": "1000 USDC",
    "nullifier_scope": "quickzkauth-v1",
    "observed_balance_usdc": 2500.5,
    "ownership_proof_type": "semaphore_zk",
    "ownership_proven": true,
    "snapshot_block": 25000000
  },
  "erc8004_compatible": true,
  "expiry": "2026-06-03T01:30:00.000Z",
  "job_id": "550e8400-e29b-41d4-a716-446655440000",
  "on_chain_verifiable": false,
  "privacy_score": "maximal",
  "proof_hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
  "service_version": "1.0.1",
  "timestamp": "2026-06-03T01:00:00.000Z",
  "valid": true,
  "validation_registry_hint": {
    "reference_uri": "https://zk.quickai.build/proof/550e8400-e29b-41d4-a716-446655440000",
    "suggested_evidence_type": "zk_proof",
    "suggested_tag": "base_wallet_qualification"
  },
  "verified_by": "Quick AI — Coeur d'Alene, Idaho, US",
  "verifier_contract": "0x0000000000000000000000000000000000000000",
  "x402_payment_ref": {
    "amount_usdc": "0.05",
    "network": "eip155:8453",
    "payer": "0x0000000000000000000000000000000000000002",
    "poll_uri": "https://zk.quickai.build/proof/550e8400-e29b-41d4-a716-446655440000",
    "resource": "POST /prove",
    "status": "settled",
    "tx_hash": "0xabc1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcd"
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://zk.quickai.build/prove' \
  -H 'content-type: application/json' \
  --data-raw '{"min_balance_usdc":1000,"tier":"basic","wallet":"0x0000000000000000000000000000000000000001"}'

# 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://zk.quickai.build/prove' \
  -H 'content-type: application/json' \
  --data-raw '{"min_balance_usdc":1000,"tier":"basic","wallet":"0x0000000000000000000000000000000000000001"}' \
  | 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%2Fzk.quickai.build%2Fprove&method=POST
const res = await pay("https://zk.quickai.build/prove", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "min_balance_usdc": 1000,
    "tier": "basic",
    "wallet": "0x0000000000000000000000000000000000000001"
  }),
});
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://zk.quickai.build/prove",
        json={
            "min_balance_usdc": 1000,
            "tier": "basic",
            "wallet": "0x0000000000000000000000000000000000000001",
        },
    )
    print(res.status_code, res.text)