X402 TypeScript SDK Integrationsguide

npm install @acedatacloud/sdk @acedatacloud/x402-client

npm install ethers

npm install @solana/web3.js

imports_ok true true true true true
@acedatacloud/sdk@2026.504.2
@acedatacloud/x402-client@2026.531.3
ethers@6.16.0
@solana/web3.js@1.98.4

import { Wallet } from 'ethers';
import { AceDataCloud } from '@acedatacloud/sdk';
import { createX402PaymentHandler } from '@acedatacloud/x402-client';

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

const evmProvider = {
  async request({ method, params }: { method: string; params?: unknown[] }) {
    if (method !== 'eth_signTypedData_v4') {
      throw new Error(`unsupported method: ${method}`);
    }
    const [, typedDataJson] = params as [string, string];
    const typedData = JSON.parse(typedDataJson);
    return wallet.signTypedData(typedData.domain, typedData.types, typedData.message);
  }
};

const client = new AceDataCloud({
  paymentHandler: createX402PaymentHandler({
    network: 'base',
    evmProvider,
    evmAddress: wallet.address
  })
});

const result = await client.openai.chat.completions.create({
  model: 'gpt-4o-mini',
  messages: [{ role: 'user', content: 'Say hi in 3 words' }],
  max_tokens: 10
});

console.log(result.choices[0].message.content);

payer 0xd0479FA9FD8C678303d477433d24C15e3723CC1C
elapsed_ms 6782
content ADC_TS_SDK_X402_OK
id chatcmpl-DlcVLO4PQWvmjPDQpy9yQw2QdLGAT

import { AceDataCloud } from '@acedatacloud/sdk';
import { createX402PaymentHandler } from '@acedatacloud/x402-client';

const [address] = await window.ethereum.request({ method: 'eth_requestAccounts' });

const client = new AceDataCloud({
  paymentHandler: createX402PaymentHandler({
    network: 'base',
    evmProvider: window.ethereum,
    evmAddress: address
  })
});

const image = await client.images.generate({
  provider: 'nano-banana',
  prompt: 'a yellow banana on a white background'
});

import { AceDataCloud } from '@acedatacloud/sdk';
import { createX402PaymentHandler } from '@acedatacloud/x402-client';

const client = new AceDataCloud({
  paymentHandler: createX402PaymentHandler({
    network: 'solana',
    solanaWallet: phantomWallet
  })
});

const result = await client.openai.chat.completions.create({
  model: 'gpt-4o-mini',
  messages: [{ role: 'user', content: 'Say hi in 3 words' }],
  max_tokens: 10
});

const client = new AceDataCloud({
  paymentHandler: createX402PaymentHandler({
    network: 'base',
    evmProvider,
    evmAddress: wallet.address,
    preferScheme: 'upto'
  })
});

npx tsx scripts/approve-permit2.ts --network base

type PaymentHandler = (ctx: {
  url: string;
  method: string;
  body?: unknown;
  accepts: PaymentRequirement[];
}) => Promise<{ headers: Record<string, string> }>;