cryptoagent-ai 0.3.0

Give your AI agent a wallet. Autonomous agents that send ETH, swap tokens, and manage DeFi — across Ethereum, Base, Arbitrum, and Polygon. Python SDK + CLI.

CryptoAgent AI

Give your AI agent a wallet. Build autonomous agents that send ETH, swap tokens on Uniswap, lend on Aave, and manage portfolios across Ethereum, Base, Arbitrum, and Polygon — all from Python.

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Why CryptoAgent AI?

Most crypto libraries make you wire together providers, signers, nonce managers, gas estimators, and ABI encoders just to send a token. CryptoAgent wraps all of that into one async call.

from sdk import CryptoAgent

async with CryptoAgent("my-wallet", password="pw", chains=["base"]) as agent:
    await agent.send_eth("0xRecipient...", 0.05, chain="base")

Need an AI that can reason about your portfolio and execute transactions autonomously? Plug in your Anthropic API key and the agent gets 19 on-chain tools — balances, swaps, lending, transfers — with built-in safety rails.

response = await agent.prompt("Swap 50 USDC to ETH on Base if gas is under 0.1 gwei")

Who is this for?

Use case	How CryptoAgent helps
Airdrop distribution	batch_send_eth() — send to hundreds of addresses in one call
Treasury management bots	Autonomous agent loop with spending limits and human approval
Portfolio rebalancers	AI reasons about allocations, executes swaps and lending
Payment automation	send_token("0x...", token="USDC", amount=100) — one line
Multi-agent systems	send_to_agent("treasury-wallet", 0.5) — transfer by wallet name
DeFi scripting	Uniswap quotes + swaps, Aave supply/borrow, all async

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Features

Multi-Chain Support

Ethereum, Base, Arbitrum, and Polygon out of the box. Failover RPC with automatic retry — if one endpoint goes down, the next one picks up.

Chain	ID	Native	Tokens
Ethereum	1	ETH	WETH, USDC, USDT, DAI, WBTC
Base	8453	ETH	WETH, USDC, USDbC, DAI
Arbitrum	42161	ETH	WETH, USDC, USDT, DAI, WBTC, ARB
Polygon	137	MATIC	WMATIC, WETH, USDC, USDT, DAI

HD Wallets with Encrypted Key Storage

BIP-44 hierarchical deterministic wallets (m/44'/60'/0'/0/N). Private keys are encrypted at rest using Fernet + PBKDF2 with 600,000 iterations. Keys are decrypted only at signing time and zeroed from memory immediately after.

19 AI Agent Tools

Every tool is registered via a @tool() decorator that auto-generates Claude-compatible JSON Schema. The AI agent can call any of these autonomously:

Category	Tools
Blockchain	get_balance, get_token_balance, get_gas_price, get_block_number
Wallet	get_address, send_eth
DeFi	get_swap_quote, swap_tokens, aave_supply, aave_borrow, aave_health_factor
Portfolio	get_portfolio, get_pnl
Memory	store_note, recall, list_notes
Transfers	transfer_to_agent, batch_send, check_agent_balance

Safety-First Design

Transactions pass through a composable safety pipeline before execution:

1. Rule Engine — rejects transactions above configurable USD thresholds
2. Spending Limits — per-transaction, hourly, and daily caps tracked in SQLite
3. Human Approval — high-value transactions pause and ask for confirmation
4. Slippage Guards — basis-point limits on all swaps
5. Audit Log — every tool call, every transaction, append-only

Autonomous Agent Loop

The agent runs a continuous Perceive - Reason - Act - Reflect cycle powered by Claude:

Perceive   →  gather balances, events, portfolio state
Reason     →  Claude analyzes context, picks tools
Act        →  execute tools with safety checks
Reflect    →  log results, update portfolio
Sleep      →  configurable interval, then loop

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Install

pip install cryptoagent-ai

Requires Python 3.11+.

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Quick Start

1. Create a Wallet

cryptoagent wallet create my-wallet -p "strong-password"

This generates a BIP-44 HD wallet, encrypts the private key, and saves it locally. Back up the seed phrase — it's only shown once.

2. Check Balances

# All chains
cryptoagent wallet balance my-wallet

# Specific chain with token balances
cryptoagent wallet balance my-wallet --chain base --tokens

3. Send a Transaction

# Send ETH
cryptoagent wallet send my-wallet 0xRecipient 0.01 --chain base -p "strong-password"

# Send USDC
cryptoagent wallet send my-wallet 0xRecipient 50 --chain base --token USDC -p "strong-password"

4. Start the AI Agent

export ANTHROPIC_API_KEY=sk-ant-...
cryptoagent agent start --wallet my-wallet -p "strong-password"

The agent begins its autonomous loop — monitoring your portfolio, reasoning about market conditions, and executing transactions within your safety limits.

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Python SDK

The SDK gives you full programmatic control without the CLI. Every method is async and accepts chain names ("base") or chain IDs (8453).

Basic Operations

import asyncio
from sdk import CryptoAgent

async def main():
    async with CryptoAgent("my-wallet", password="pw", chains=["base", "arbitrum"]) as agent:
        # Properties
        print(agent.address)        # 0x742d35Cc6634C0532925a3b844Bc9e7595f...
        print(agent.wallet_name)    # my-wallet

        # Read operations
        bal = await agent.get_balance("base")               # 1.234 (float ETH)
        usdc = await agent.get_token_balance("base", "USDC") # 500.0 (float USDC)
        gas = await agent.get_gas_price("base")               # 0.001 (float gwei)
        all_bal = await agent.get_all_balances()               # {"base": 1.23, "arbitrum": 0.5}

asyncio.run(main())

Send ETH and Tokens

async with CryptoAgent("my-wallet", password="pw", chains=["base"]) as agent:
    # Send native ETH — amount in human-readable units
    receipt = await agent.send_eth("0xRecipient...", 0.05, chain="base")
    print(receipt.tx_hash)       # 0xabc123...
    print(receipt.success)       # True
    print(receipt.gas_used)      # 21000

    # Send ERC-20 tokens — resolve by symbol
    receipt = await agent.send_token(
        "0xRecipient...",
        token="USDC",
        amount=100.0,
        chain="base",
    )

    # Approve a spender (e.g., Uniswap router)
    receipt = await agent.approve_token("USDC", spender="0xRouter...", chain="base")

Agent-to-Agent Transfers

Send funds between wallets by name — no need to look up addresses:

async with CryptoAgent("treasury", password="pw", chains=["base"]) as agent:
    # Send ETH to another wallet in your keystore
    receipt = await agent.send_to_agent("operations-wallet", 0.5, chain="base")

    # Send tokens to another wallet
    receipt = await agent.send_to_agent("payments-wallet", 1000.0, chain="base", token="USDC")

Batch Transfers

Send to multiple recipients in a single call. Each transfer is sequential; failures don't abort the batch.

async with CryptoAgent("payroll", password="pw", chains=["base"]) as agent:
    # Batch ETH send
    results = await agent.batch_send_eth({
        "0xAlice": 0.1,
        "0xBob": 0.2,
        "0xCharlie": 0.15,
    }, chain="base")

    for r in results:
        if isinstance(r, Exception):
            print(f"Failed: {r}")
        else:
            print(f"Sent: {r.tx_hash}")

    # Batch token send
    results = await agent.batch_send_token({
        "0xAlice": 50.0,
        "0xBob": 100.0,
    }, token="USDC", chain="base")

AI-Powered Prompts

Give the agent a natural-language instruction. It reasons with Claude, calls on-chain tools, and returns a response. Requires ANTHROPIC_API_KEY.

async with CryptoAgent("my-wallet", password="pw", chains=["base"]) as agent:
    # Ask about portfolio
    response = await agent.prompt("What is my current balance and gas price on Base?")
    print(response)

    # Execute a complex action
    response = await agent.prompt(
        "If my USDC balance is above 500, swap half to ETH on Base"
    )
    print(response)

SDK Method Reference

Method	Returns	Description
agent.address	str	Wallet address (property)
agent.wallet_name	str	Wallet name (property)
get_balance(chain)	float	Native token balance in ETH/MATIC
get_token_balance(chain, token)	float	ERC-20 balance by symbol or address
get_gas_price(chain)	float	Gas price in gwei
get_all_balances()	dict[str, float]	Balances across all configured chains
send_eth(to, amount, chain)	TransactionReceipt	Send native ETH/MATIC
send_token(to, token, amount, chain)	TransactionReceipt	Send ERC-20 tokens
send_to_agent(name, amount, chain, token?)	TransactionReceipt	Send to wallet by name
batch_send_eth(recipients, chain)	list	Send ETH to multiple addresses
batch_send_token(recipients, token, chain)	list	Send tokens to multiple addresses
approve_token(token, spender, chain)	TransactionReceipt	Approve ERC-20 spending
prompt(message)	str	AI-powered natural language execution
close()	None	Shut down providers

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Architecture

                         CryptoAgent (SDK / CLI)
                                  |
                    +-------------+-------------+
                    |                           |
              Python SDK                   AI Agent Loop
           (direct calls)          (Perceive → Reason → Act → Reflect)
                    |                           |
                    +-------------+-------------+
                                  |
                          +-------+-------+
                          |               |
                    ChainClient      Guardian
                   (read/write)    (safety pipeline)
                          |               |
                  +-------+-------+   RuleEngine
                  |       |       |   SpendingLimits
              Provider  Signer  Nonce  Approval
              (failover) (encrypt) (mgr) AuditLog
                  |
          +-------+-------+-------+
          |       |       |       |
       Ethereum  Base  Arbitrum  Polygon

Package Structure

cryptoagent-ai/
  config/       — Settings, chain configs (YAML), protocol configs
  core/         — Agent loop, Brain (Claude API), tool registry, types, exceptions
  wallet/       — HD derivation, keystore encryption, transaction signing
  chain/        — Multi-chain providers, EIP-1559 builder, nonce manager
  protocols/    — Uniswap V3 quotes + swaps, Aave V3 supply + borrow
  tools/        — 19 registered agent tools (blockchain, DeFi, transfers, memory)
  memory/       — SQLite store, portfolio tracking, audit log
  safety/       — Rule engine, spending limits, approval manager, Guardian
  events/       — Event bus with topic-based pub/sub
  orchestration/ — Multi-agent coordination
  sdk/          — Python SDK (CryptoAgent class, batch helpers)
  cli/          — Typer CLI with Rich output

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Configuration

Environment Variables

Variable	Description	Default
ANTHROPIC_API_KEY	Claude API key (required for AI agent)	—
WALLET_PASSWORD	Default wallet password	—
ETH_RPC_URL	Override Ethereum RPC	Public RPCs
BASE_RPC_URL	Override Base RPC	Public RPCs
ARBITRUM_RPC_URL	Override Arbitrum RPC	Public RPCs
POLYGON_RPC_URL	Override Polygon RPC	Public RPCs
MAX_TX_VALUE_USD	Max single transaction value	$100
DAILY_SPENDING_LIMIT_USD	Daily spending cap	$1,000
REQUIRE_HUMAN_APPROVAL_ABOVE_USD	Approval threshold	$50
LOG_LEVEL	Logging verbosity	INFO

Chain Configuration

Chains are configured in config/chains.yaml. Each chain specifies RPC endpoints, token addresses, and explorer URLs. Environment variable RPC overrides take priority.

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CLI Reference

cryptoagent info                          # Show configuration
cryptoagent gas                           # Gas prices across all chains
cryptoagent gas --chain base              # Gas price on Base

cryptoagent wallet create <name>          # Create HD wallet
cryptoagent wallet list                   # List all wallets
cryptoagent wallet address <name>         # Show wallet address
cryptoagent wallet balance <name>         # Check balances (all chains)
cryptoagent wallet balance <name> -c base --tokens  # Base + ERC-20 balances
cryptoagent wallet send <name> <to> <amount> -c base  # Send ETH

cryptoagent agent start                   # Start autonomous agent
cryptoagent agent start --once            # Run single cycle
cryptoagent agent status                  # Check agent status

cryptoagent tx history <name>             # Transaction history
cryptoagent tx lookup <hash> -c base      # Look up transaction on-chain

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Security

CryptoAgent is designed with defense-in-depth:

• Encrypted keys — Private keys and mnemonics encrypted with Fernet + PBKDF2 (600k iterations). Decrypted only at signing time, zeroed from memory immediately after.
• Spending limits — Per-transaction, hourly, and daily USD caps. Tracked persistently in SQLite.
• Human approval — Transactions above a configurable USD threshold require explicit confirmation.
• Slippage protection — Basis-point limits on all DeFi swaps prevent sandwich attacks.
• Audit log — Every tool call, every transaction attempt, and every safety decision is logged.
• Read-only vs. write tools — Safety pipeline applies stricter checks to state-changing operations.

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Protocol Fee

A micro-fee of 0.000001 ETH (~$0.0025) is collected per on-chain transaction to support development. The fee is automatically skipped if the wallet balance is too low to cover it. It never blocks your transaction.

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Development

git clone https://github.com/coins/cryptoagent-ai.git
cd cryptoagent-ai
pip install -e ".[dev]"

# Run tests
pytest

# Lint
ruff check .

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License

MIT