Coldcard
Bitcoin Accounting
Coldcard + Clams
xPub DescriptorColdcard is an air-gapped, Bitcoin-only hardware wallet built for maximum security. Clams tracks your Coldcard using an xPub or descriptor exported via microSD. Your signing keys never leave the device. Full accounting visibility without compromising security.
What Clams tracks
- All addresses from your wallet derivation paths
- Incoming and outgoing transactions
- Individual UTXOs with cost basis
- Transaction fees paid
- Capital gains on each spend
How it works
Export xPub or descriptor via microSD
On your Coldcard, export an xPub (single sig) or descriptor (single sig or multisig) to microSD. Your signing keys stay air-gapped.
Add connection in Clams
Create a connection with the Clams CLI. Choose the xPub or Descriptor command below based on your export type, replacing the placeholder value.
$ clams connections create --label my-coldcard --kind XPub --configuration '{"xpub":"YOUR_XPUB","address_types":["bech32"]}'
$ clams connections create --label my-coldcard-multisig --kind Descriptor --configuration '{"descriptor":"YOUR_DESCRIPTOR"}'
Sync transaction history
Run the sync command below to discover all addresses and import your full transaction history.
$ clams connections sync --label my-coldcard
Generate journal entries
Process your imported transactions into accounting journals with the command below.
$ clams journals process
Frequently asked questions
What data does Clams import from Coldcard?
Clams imports all addresses derived from your xPub or descriptor, incoming and outgoing transactions, UTXOs, and calculates cost basis per UTXO. Your signing keys never leave the Coldcard.
Does Clams access my private keys?
No. Clams uses watch-only access via xPub or descriptor. Your signing keys stay air-gapped on your Coldcard. These only allow Clams to view addresses and transactions, not spend funds.
Can I track multiple Coldcard wallets?
Yes. Add each Coldcard wallet separately in Clams using its xPub or descriptor. Each wallet gets independent tracking and reporting.
Which Coldcard models are supported?
All Coldcard models are supported including Mk3, Mk4, and Q. Any device that can export an xPub or descriptor to microSD works with Clams.
How do I get capital gains reports from my Coldcard transactions?
Export your xPub or descriptor from Coldcard via microSD and add it to Clams. Clams calculates cost basis for every UTXO and tracks capital gains when you spend. Export reports from the Exports widget.
Do I need my Coldcard connected to sync new transactions?
No. Once you've added the xPub or descriptor to Clams, you can sync at anytime. Your Coldcard stays safely air-gapped.
Start tracking your Coldcard wallet
Install Clams and connect your wallet in minutes.