Prowlarr for your money.
Your exchanges and wallets, read once, checked, and sent to the apps you use.
Paid portfolio apps sell this sync. Fundarr is free, self-hosted, and your keys never leave your server.
- Sources: Binance, OKX, Kraken, Coinbase, Bitpanda, Interactive Brokers, Trade Republic, and any wallet (Ledger, Trezor, MetaMask, Phantom…), all read-only.
- One checked history: Fundarr replays it against the real balances, fills the gaps APIs leave, and pairs transfers between your accounts.
- Apps: Wealthfolio and Ghostfolio receive it after every sync; Cairn, Koinly or your own app read it.
1. Run it
docker compose up -d # with the compose.yaml of this repoor docker run -d -p 9494:9494 -v fundarr:/data ghcr.io/alexis-marcel/fundarr. It is one small container (a Go binary and a SQLite file) and runs on a Raspberry Pi.
2. Add a source. Open http://localhost:9494, create your account, then Sources → Add source. Each form shows how to create a read-only key.
3. Connect an app. Apps → Add app: Wealthfolio, Ghostfolio, Cairn, or any other app.
Just looking? Open the live demo (made-up portfolio, read-only), or run it yourself: docker run --rm -e FUNDARR_DEMO=1 -p 9494:9494 ghcr.io/alexis-marcel/fundarr, no account needed. With Cairn, an app built on Fundarr, linked to it: docker compose -f compose.demo.yaml up (compose.demo.yaml).
 Every source is checked against its real balances. |
 Wallets: a guide per app, every account in one source. |
 Apps Fundarr sends to, and apps that read it. |
 Any app connects with an address and a token. |
| Binance | Since 2017: trades, converts, Auto-Invest, card purchases, Earn and staking, Pay, P2P. Import the export once to fill what the API forgot. |
| OKX | Since 2021, older trades from OKX's archives. |
| Kraken | The whole ledger. |
| Coinbase | The whole history, Advanced Trade included. |
| Bitpanda | Crypto, stocks and ETFs, metals, savings plans. |
| Interactive Brokers (beta) | Trades, dividends, cash, transfers and corporate actions through the official Flex Web Service. |
| Trade Republic | Compte-titres, PEA and crypto: import the CSV export, or Connect (beta) and sync with one tap, approved in the app. |
| Wallet | Bitcoin, Litecoin, Dogecoin, Bitcoin Cash, Ethereum and EVM chains, Solana, Tron, Cardano, XRP. Paste a public key or an address, never a recovery phrase. |
Details and limits per platform: docs/sources.md.
| App | How |
|---|---|
| Wealthfolio | Fundarr sends new activities after every sync, through Wealthfolio's MCP endpoint (WF_MCP_ENABLED=true and an access token). |
| Ghostfolio | Fundarr sends new activities through its import API, with your security token. |
| Cairn | Reads Fundarr: where your crypto stands, its progress, and the French tax form 2086. |
| Koinly, spreadsheets | Download the history as CSV (Settings → Export), in Fundarr's or Koinly's format. |
| Your own app | Reads the API with a token. |
Apps → Add app → Other app gives an address and a token:
curl -H "Authorization: Bearer fdr_…" http://localhost:9494/api/v1/portfolioThe read API serves every activity, the holdings, the portfolio and its history, and the French 2086 form, already computed. An app with its own database stays in sync through a changes feed (/api/v1/changes, with an optional notification), and a Go app can reuse Fundarr's cost, portfolio and tax code (pkg/). Develop against the demo (FUNDARR_DEMO=1, token fdr_demo). Start with Build an app; the full contract is in api.md and openapi.yaml. Cairn is a complete example.
- Balance check: the history is replayed and compared with what each platform reports, asset by asset.
- Corrections: what an API forgot becomes a correction valued at that day's price, held 48 hours in case the history catches up.
- Statements: a platform's own export replaces the corrections with the real trades.
- Transfers: a withdrawal and the deposit it became are paired, so apps see a move at cost, not a sale.
- Prices: daily prices and exchange rates from public data, no key needed.
- Delivery: each activity is sent once; failures are retried.
More in How it works.
Releases are tagged (v0.1.0) and published as images with the same tag (ghcr.io/alexis-marcel/fundarr:0.1); latest follows main. The API stays compatible within /api/v1 (details); release notes.
None is needed. Sign-in (password, OpenID Connect, reverse proxy), the data folder and the other settings are in docs/configuration.md. Back up /data whole: it holds the database and the key that encrypts your API keys.
- Use read-only keys. Fundarr refuses a key it can tell allows trading or withdrawals.
- Keys are encrypted at rest (AES-256-GCM) and never sent back to the browser.
- Restrict keys to your server's IP when the platform allows it.
- Keep Fundarr behind your VPN or SSO; it does not need to be public.
go test ./...
FUNDARR_DEMO=1 go run ./cmd/fundarr # API on :9494
cd web && npm install && npm run dev # UI on :5173, API proxied to :9494A new source or app is one Go package: see CONTRIBUTING.md.
AGPL-3.0. If you run a modified Fundarr for others, share your changes.
Coin icons come from cryptocurrency-icons (CC0) and ship with Fundarr, so no third party learns which coins you hold.