Stablecoin yield your agent can actually execute.

// 1Tx quickstart — deposit 100 USDC into the highest-APY instrument on Base.
// Use your existing wallet client. No 1Tx SDK required.
declare const wallet: {
  account: { address: string };
  sendTransaction(tx: Record<string, unknown>): Promise<unknown>;
};

export const api = async <T>(path: string, body?: object): Promise<T> =>
  (await fetch(`https://api.1tx.fi/api/v1${path}`, {
    method: body ? "POST" : "GET",
    headers: { "content-type": "application/json", "x-api-key": process.env["1TX_API_KEY"]! },
    body: body && JSON.stringify(body),
  })).json();

// 1. Discover
const { data } = await api<{ data: { instrumentId: string }[] }>(
  "/instruments?chainId=8453&isActive=true&sortBy=apy&sortOrder=desc&limit=1",
);

// 2. Build — point sourceChainId at wherever your USDC sits; 1Tx routes over CCTP.
const { transactions } = await api<{ transactions: Record<string, unknown>[] }>("/transactions/buy", {
  userAddress: wallet.account.address,
  instrumentId: data[0]!.instrumentId,
  amountUsdc: "100",
  sourceChainId: 8453,
});

// 3. Execute — 1Tx builds the transaction, your wallet signs it.
for (const tx of transactions) await wallet.sendTransaction(tx);

# 1. Discover — highest-APY active instrument on Base
curl -s "https://api.1tx.fi/api/v1/instruments?chainId=8453&isActive=true&sortBy=apy&sortOrder=desc&limit=1" \
  -H "x-api-key: $1TX_API_KEY"

# 2. Build — the unsigned transaction set (approve, then buy).
#    Cross-chain? Set sourceChainId to where your USDC sits and the
#    same call routes the deposit over Circle CCTP.
curl -s -X POST "https://api.1tx.fi/api/v1/transactions/buy" \
  -H "Content-Type: application/json" \
  -H "x-api-key: $1TX_API_KEY" \
  -d '{
    "userAddress": "0xYourAddress",
    "instrumentId": "0x…from step 1",
    "amountUsdc": "100",
    "sourceChainId": 8453,
    "slippageBps": 50
  }'

# 3. Execute — sign the returned transactions with your wallet.
#    1Tx builds the transaction; your wallet signs it.

# The 1Tx Claude skill — Claude Code as portfolio manager,
# backed by a Circle agent wallet (no private key in your env).

# Setup
pnpm install
cp .env.example .env      # fill 1TX_* and CIRCLE_* values

# Provision the Circle agent wallet — OTP-gated session
pnpm exec circle wallet login you@example.com --type agent --init
pnpm exec circle wallet fund --address <addr> --chain BASE-SEPOLIA --token usdc

# Then ask Claude Code, in the repo:
"set up a diversified stablecoin portfolio"

# Claude will:
#   1. read the wallet and the live 1Tx instrument universe
#   2. propose a weighted allocation — explaining which metrics
#      drove every pick
#   3. wait for your approval, then execute across chains
#      (Circle CCTP where needed)
#
# Later, in the same session:  "rebalance"  ·  "withdraw"
# Every spend is confirmation-gated and bounded by your approved
# budget and the Circle wallet's policy limits.