ExitBook

Open-source CLI for crypto transaction tracking and tax reporting

Why Exitbook exists

Crypto tax tools charge per transaction, hide their calculations, and some fabricate events to fill gaps in your data.

Exitbook doesn't do any of that. Every number traces back to a real import. Every calculation is visible. If data is missing, it tells you instead of guessing.

How it works

1. Import — pull transactions from blockchains (by wallet address) or exchanges (by API key, or CSV for KuCoin).
2. Normalize — convert everything into a universal transaction format.
3. Link — detect transfers between your wallets. You review, confirm, or reject each suggested link.
4. Price — attach USD prices to every inflow, outflow, and fee. Fill any gaps manually.
5. Calculate — compute cost basis (FIFO, LIFO, or average).

Before you file

1. Check balances — after importing, run balance to verify Exitbook matches the chain. If balances are correct, the calculations built on top of them will be too.
2. Import all your wallets — transfers between your own wallets need both sides to link correctly. Missing a wallet means broken links.
3. Pricing is intraday — USD prices are per-day, not per-second. Close enough for tax reporting.

Supported Sources

Blockchains

Chain Family	Sub-chains	Import Status	Balance Verification
Bitcoin	4 chains	Complete (simple wallets)	Complete (simple wallets)
Cardano	1 chain	Complete (simple wallets)	Complete (simple wallets)
Cosmos	95 chains	Complete (simple wallets)	Complete (simple wallets)
EVM	113 chains	Complete (simple wallets)*	Complete (simple wallets)*
NEAR	1 chain	Complete (simple wallets)	Complete (simple wallets)
Solana	1 chain	Complete (simple wallets)	Complete (simple wallets)
Substrate	89 chains	Complete (simple wallets)	Complete (simple wallets)
XRP	2 chains	Complete (simple wallets)	Complete (simple wallets)

* EVM supports both address and contract address tracking

Note: All chains support complete import and balance verification for simple user wallets (EOA addresses). Complex wallet scenarios (multi-sig, smart contract wallets, cross-chain interactions) require additional work.

View all supported chains

Bitcoin family: bitcoin, dogecoin, litecoin, bitcoin-cash

Cardano: cardano

Cosmos chains: injective, osmosis, cosmoshub, terra, juno, secret, stargaze, and 88 more

EVM chains: ethereum, polygon, optimism, arbitrum, base, avalanche, beam, bsc, zksync, polygon-zkevm, linea, scroll, mantle, blast, and 99 more (see packages/blockchain-providers/src/blockchains/evm/evm-chains.json)

NEAR: near

Solana: solana

Substrate chains: polkadot, bittensor, kusama, acala, moonbeam, astar, and 83 more

XRP: xrp, xrp-testnet

Exchanges

Exchange	CSV Import	API Import
Kraken	-	Working
KuCoin	Working	Working
Coinbase	-	Working

Blockchain Providers

ExitBook uses a multi-provider failover system to fetch blockchain data. Each blockchain family supports multiple data providers that implement different operations. The system automatically retries across providers if one fails.

Provider Operations

Operation	Description
getAddressTransactions	Fetch all transactions for an address
getAddressInternalTransactions	Fetch internal/contract transactions (EVM)
getAddressBalances	Get native token balance for an address
getAddressTokenTransactions	Fetch token transfers for an address
getAddressTokenBalances	Get all token balances for an address
getTokenMetadata	Retrieve token metadata (symbol, decimals, etc.)
getAddressBeaconWithdrawals	Fetch Ethereum beacon chain withdrawals
hasAddressTransactions	Check if address has any transactions

Available Providers by Blockchain

Bitcoin Family (3 providers)

Provider	Chains Supported	Operations	API Key Required
blockstream	bitcoin	Transactions, Balances, HasTransactions	No
mempool.space	bitcoin	Transactions, Balances, HasTransactions	No
tatum	bitcoin, litecoin, dogecoin, bitcoin-cash	Transactions, Balances, HasTransactions	Yes (TATUM_API_KEY)

Note: Tatum provides coverage for the other Bitcoin-family chains where Blockstream/Mempool.space don't operate.

Cardano (1 provider)

Provider	Operations	API Key Required
blockfrost	Transactions, Balances, HasTransactions	Yes (BLOCKFROST_API_KEY)

Cosmos (1 provider)

Provider	Chains Supported	Operations	API Key Required
injective-explorer	injective	Transactions, Balances	No

Note: Only Injective is currently supported. Other Cosmos chains (Osmosis, Terra, etc.) planned via Mintscan.

EVM Chains (5 providers)

Provider	Chains Supported	Operations	API Key Required
moralis	All 113 EVM chains	Transactions, InternalTxs, Balances, TokenTxs, TokenBalances, TokenMetadata	Yes (MORALIS_API_KEY)
routescan	Most EVM chains	Transactions, InternalTxs, Balances, TokenTxs	No
etherscan	ethereum	BeaconWithdrawals	Yes (ETHERSCAN_API_KEY)
thetascan	theta	Transactions, Balances, TokenBalances	No
theta-explorer	theta	Transactions	No

Note: Moralis and Routescan provide multi-chain coverage. Etherscan/ThetaScan are chain-specific.

NEAR (1 provider)

Provider	Operations	API Key Required
nearblocks	Transactions, TokenTransactions, Balances	No

Solana (3 providers)

Provider	Operations	API Key Required
helius	Transactions, Balances, TokenBalances, TokenTxs, TokenMetadata	Yes (HELIUS_API_KEY)
solana-rpc	Transactions, Balances, TokenBalances	No
solscan	Transactions, Balances	Yes (SOLSCAN_API_KEY)

Substrate (2 providers)

Provider	Chains Supported	Operations	API Key Required
subscan	polkadot, kusama	Transactions, Balances	No
taostats	bittensor	Transactions, Balances	Yes (TAOSTATS_API_KEY)

Note: Only 3 of 89 Substrate chains currently have providers. Others require additional integrations.

Summary: 16 active providers across 7 blockchain families. 6 require API keys, 10 work without authentication.

Disabled providers: Alchemy (EVM), Blockcypher (Bitcoin - rate limits too low), Blockchain.com (Bitcoin - timeouts)

To view full provider details including rate limits: pnpm blockchain-providers:list

CLI Commands

Core Operations

# Import from exchange CSV (KuCoin only)
pnpm run dev import --exchange kucoin --csv-dir ./exports/kucoin

# Import from exchange API
pnpm run dev import --exchange kraken --api-key KEY --api-secret SECRET

# Import blockchain transactions (simple wallets)
pnpm run dev import --blockchain bitcoin --address bc1q...

# Verify live balance
pnpm run dev balance --account-id <id>

Data Management

# View transactions
pnpm run dev transactions

# View accounts
pnpm run dev accounts

# Manage prices
pnpm run dev prices enrich
pnpm run dev prices set <symbol> <amount> --date YYYY-MM-DD

# Export data
pnpm run dev export --exchange kraken --format csv --output ./report.csv

# Reprocess all raw data (clears derived data, rebuilds transactions)
pnpm run dev reprocess

Utilities

# List available blockchains and providers
pnpm run dev blockchains view

# Clear processed data (keeps raw data)
pnpm run dev clear

Getting Started

Requirements: Node.js ≥24, pnpm ≥10.6.2

# Install dependencies
pnpm install

# Build packages
pnpm build

# Run tests
pnpm test

# Try an import (KuCoin CSV or Kraken API)
pnpm run dev import --exchange kucoin --csv-dir ./your-data
# or
pnpm run dev import --exchange kraken --api-key KEY --api-secret SECRET

Configuration: Add API keys to .env in project root (see CLAUDE.md for details)

Contributing

Bug reports and feature requests: open a GitHub issue.

Contributions are welcome — see CONTRIBUTING.md for the process, coding conventions, and how to add new exchange or blockchain adapters.

License

AGPL-3.0-or-later