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TZUR for Agents · Legal

Credits

Bitcoin Standards

TZUR for Agents is built using open standards from the Bitcoin ecosystem:

  • BIP-39: Mnemonic seed phrases
  • BIP-32: Hierarchical deterministic wallets
  • BIP-84: Native SegWit address derivation (m/84'/0'/0')
  • BIP-125: Replace-by-fee (RBF)
  • BIP-21: Bitcoin payment URIs

Network Protocol

Network communication uses the Electrum protocol for retrieving blockchain information and broadcasting transactions. Electrum servers are treated as untrusted data providers only (TLS, Merkle proofs); all signing and broadcasting happen locally. Public blockchain explorer data is provided by the BlockSight.Live API.

Agent Interface

Agents connect over the Model Context Protocol (MCP) on a local, loopback-only service (127.0.0.1). The shared Bitcoin engine (TZURCore) is the same audited core used by the TZUR wallet; it is reused as-is and never reimplemented for agents. The agent interface exposes no capability to read the seed or private keys.

Technologies

  • Rust
  • Tauri
  • Solid.js
  • TypeScript
  • Windows security platform: DPAPI (Data Protection API), TPM (Trusted Platform Module), Windows Hello
  • secp256k1 (Bitcoin Core, MIT License)
  • RustCrypto libraries: aes-gcm, pbkdf2, sha2, zeroize
  • Anthropic Claude (development partner)

Open Source

The Bitcoin protocol and related standards are open technologies developed by the global Bitcoin community. TZUR contributes 30 TZUR Original BIP-39 wordlists for non-English languages, created by Blocksight OÜ and released under a permissive open-source license. Together with the 10 canonical wordlists from the Trezor BIP-39 standard, the complete collection is published at github.com/osem23/bip39-wordlists-tzur for any wallet to adopt.

Proprietary Status

While TZUR for Agents builds on open Bitcoin standards and the open-source components listed above, the TZUR for Agents application itself is proprietary software owned by Blocksight OÜ. It is licensed, not sold, and distributed under the applicable end-user licence terms. All rights not expressly granted are reserved.

Trademark

Bitcoin is used descriptively. TZUR for Agents and Blocksight OÜ are not affiliated with, endorsed by, or sponsored by any Bitcoin foundation or related organization. The Model Context Protocol and any third-party AI clients used with TZUR for Agents are the property of their respective owners.

Company

TZUR for Agents is developed by Blocksight OÜ, an Estonian private limited company, registry code 17474529, registered at Vesivärava tn 50-301, 10152 Tallinn, Estonia. Website: https://tzur.live. Legal contact: legal@blocksight.live. Support and general enquiries: contact@tzur.live.

Last Updated: 8/6/2026