curl -X POST "https://starknet.api.avnu.fi/staking/v3/pools/0x123abc/members/0x0456def/stake" \
  -H "Content-Type: application/json" \
  -d '{
    "userAddress": "0x0456def...",
    "amount": "0xde0b6b3a7640000"
  }'

async function stakeStrk(poolAddress: string, amount: string, account: Account) {
  // 1. Get staking calls
  const response = await fetch(
    `https://starknet.api.avnu.fi/staking/v3/pools/${poolAddress}/members/${account.address}/stake`,
    {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        userAddress: account.address,
        amount
      })
    }
  );

  const { calls } = await response.json();

  // 2. Execute transaction
  const tx = await account.execute(calls);

  // 3. Wait for confirmation
  await account.waitForTransaction(tx.transaction_hash);

  return tx.transaction_hash;
}

// Usage
const txHash = await stakeStrk(
  '0x123abc',
  '0xde0b6b3a7640000', // 1 STRK in hex
  account
);

from starknet_py.net.account.account import Account
import requests

async def stake_strk(pool_address: str, amount: str, account: Account):
    # Get calls
    response = requests.post(
        f'https://starknet.api.avnu.fi/staking/v3/pools/{pool_address}/members/{account.address}/stake',
        json={
            'userAddress': account.address,
            'amount': amount
        }
    )

    calls = response.json()['calls']

    # Execute
    tx = await account.execute(calls)
    await account.wait_for_tx(tx.transaction_hash)

    return tx.transaction_hash

{
  "chainId": "0x534e5f4d41494e",
  "calls": [
    {
      "contractAddress": "0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7",
      "entrypoint": "approve",
      "calldata": ["0x123abc", "0xde0b6b3a7640000", "0"]
    },
    {
      "contractAddress": "0x123abc",
      "entrypoint": "stake",
      "calldata": ["0xde0b6b3a7640000", "0"]
    }
  ]
}