Cryptographically Proven Security
Leveraging Feldman Verifiable Secret Sharing (VSS) and 2-of-2 share separation for uncompromising key protection.
Feldman VSS Key Generation
Distributed Key Generation (DKG) using Feldman VSS with AES-256-GCM encrypted share exchange. Shares are generated jointly and held on separate nodes; no full key is assembled during signing, eliminating single points of failure.
We support 2-of-2 standard and trustless threshold schemes out of the box.
Policy Engine
Define strict spending limits, whitelists, and approval workflows.
policies are cryptographically enforced by the nodes themselves, not just the API layer.
Developer Experience
Idempotent APIs, replay protection, and strong typing. Listen for TRANSACTION_CREATED webhooks in real-time.
await planbok.wallets.create({
chain: 'BTC',
curve: 'secp256k1',
custody: 'MPC'
});60+ Chains
Self-Hosted Nodes, coming soon
Run a node on your own infrastructure. We provide full Docker images and packaged installation for on-premise use.
RBF Acceleration
Never get stuck with low gas. Our RBF (Replace-By-Fee) engine automatically bumps fees for stuck transactions.
Integrate in Minutes
Simple 3-step process to get your first signature.
Install SDK
Add our TypeScript SDK to your project.npm install @planbok/sdk
Configure Policy
Set up your first policy in the dashboard. Define who can sign and spending limits.
Create Wallet
Generate a DKG request. Nodes will coordinate to create key shares securely.
Frequently Asked Questions
How does the private key exist?
Not during signing. The private key is never assembled in one place. It exists only as shares, and signing uses threshold cryptography on those shares. An authorized export does derive the full key for its owner, using the secret the owner supplies.
Can Planbok steal my funds?
Not unilaterally. Signing requires both shares, and in trustless and customer-custody modes it also requires the secret the customer supplies. Standard-mode wallets sign with a valid organization API key.
What chains are supported?
We support ECDSA (Ethereum, Bitcoin, Binance) and Ed25519 (Solana, NEAR, Cardano) curves. This covers 99% of all blockchains.