X402

npm install venice-x402-client

import { VeniceClient } from 'venice-x402-client'

const venice = new VeniceClient(process.env.WALLET_KEY)

await venice.topUp(10) // überspringen, wenn die Wallet bereits Guthaben hat

const response = await venice.chat({
  model: 'kimi-k2-5',
  messages: [{ role: 'user', content: 'Hello!' }]
})

import { createAuthFetch } from 'venice-x402-client'

const authFetch = createAuthFetch(process.env.WALLET_KEY)

import { Wallet } from 'ethers'
import { SiweMessage, generateNonce } from 'siwe'

const wallet = new Wallet(process.env.EVM_PRIVATE_KEY)

async function createSiwxHeader(resourceUrl: string): Promise<string> {
  const now = new Date()
  const fields = {
    domain: 'api.venice.ai',
    address: wallet.address,
    statement: 'Sign in to Venice AI',
    uri: resourceUrl,
    version: '1',
    nonce: generateNonce(),
    issuedAt: now.toISOString(),
    expirationTime: new Date(now.getTime() + 5 * 60 * 1000).toISOString(),
  }

  const message = new SiweMessage({ ...fields, chainId: 8453 }).prepareMessage()
  const signature = await wallet.signMessage(message)

  return Buffer.from(JSON.stringify({ ...fields, chainId: 'eip155:8453', type: 'eip191', signature }), 'utf8').toString('base64')
}

const response = await fetch('https://api.venice.ai/api/v1/chat/completions', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'SIGN-IN-WITH-X': await createSiwxHeader('https://api.venice.ai/api/v1/chat/completions'),
  },
  body: JSON.stringify({
    model: 'kimi-k2-5',
    messages: [{ role: 'user', content: 'Hello!' }],
  }),
})

export WALLET_ADDRESS=0xYOUR_WALLET_ADDRESS_OR_SOLANA_ADDRESS
export X402_AUTH=YOUR_BASE64_SIWX_HEADER

curl --request GET \
  --url "https://api.venice.ai/api/v1/x402/balance/$WALLET_ADDRESS" \
  --header "SIGN-IN-WITH-X: $X402_AUTH"

curl --request POST \
  --url https://api.venice.ai/api/v1/x402/top-up

export EVM_PRIVATE_KEY=0xYOUR_PRIVATE_KEY

export X402_PAYMENT="$(
node --input-type=module <<'EOF'
import { createPaymentHeader } from "x402/client";
import { privateKeyToAccount } from "viem/accounts";

const signer = privateKeyToAccount(process.env.EVM_PRIVATE_KEY);
const amountUsd = 5;
const amountBaseUnits = String(Math.round(amountUsd * 1e6));

const header = await createPaymentHeader(signer, 2, {
  scheme: "exact",
  network: "base",
  maxAmountRequired: amountBaseUnits,
  resource: "https://api.venice.ai/api/v1/x402/top-up",
  description: "Venice x402 top-up",
  mimeType: "application/json",
  payTo: "0x2670B922ef37C7Df47158725C0CC407b5382293F",
  maxTimeoutSeconds: 300,
  asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  extra: { name: "USD Coin", version: "2" },
});

process.stdout.write(header);
EOF
)"

curl -X POST "https://api.venice.ai/api/v1/x402/top-up" \
  -H "PAYMENT-SIGNATURE: $X402_PAYMENT"

export X402_AUTH=YOUR_BASE64_SIWX_HEADER

curl --request POST \
  --url https://api.venice.ai/api/v1/chat/completions \
  --header "Content-Type: application/json" \
  --header "SIGN-IN-WITH-X: $X402_AUTH" \
  --data '{
    "model": "kimi-k2-5",
    "messages": [
      {
        "role": "user",
        "content": "Hello from an x402-authenticated wallet."
      }
    ]
  }'

export WALLET_ADDRESS=0xYOUR_WALLET_ADDRESS_OR_SOLANA_ADDRESS
export X402_AUTH=YOUR_BASE64_SIWX_HEADER

curl --request GET \
  --url "https://api.venice.ai/api/v1/x402/transactions/$WALLET_ADDRESS?limit=10&offset=0" \
  --header "SIGN-IN-WITH-X: $X402_AUTH"