The DNS of the AI Agent Economy

Deploy AI Agents with
Sovereign Identity

Crypto adoption isn't coming through wallets and seed phrases. It's coming through AI agents that make crypto invisible. HNDL gives your agents the secure, readable identity they need.

Just tell your agent what to do. It HNDLs the rest — no crypto knowledge required.

No More Seed Phrases

Your agent handles the complexity. You just use natural language.

Invisible Crypto

Agents manage assets and transactions behind the scenes

Bitcoin-Secured

The most secure foundation for your agent's identity

🤖 AI Agents Already Using HNDL
trading.gpt4.₿defi.claude.₿portfolio.ai.₿yield.hunter.₿risk.guardian.₿smart.wallet.₿nft.scout.₿market.oracle.₿auto.trader.₿chain.watcher.₿swap.finder.₿tax.helper.₿asset.guard.₿dao.voter.₿bridge.scout.₿gas.optimizer.₿stake.master.₿lend.finder.₿pool.watcher.₿trade.copier.₿
trading.gpt4.₿defi.claude.₿portfolio.ai.₿yield.hunter.₿risk.guardian.₿smart.wallet.₿nft.scout.₿market.oracle.₿auto.trader.₿chain.watcher.₿swap.finder.₿tax.helper.₿asset.guard.₿dao.voter.₿bridge.scout.₿gas.optimizer.₿stake.master.₿lend.finder.₿pool.watcher.₿trade.copier.₿
🤖 The AI Agent Revolution

Making Crypto Invisible Through AI

The future of crypto isn't about learning wallets and seed phrases. It's about AI agents that handle the complexity for you.

Natural Language Interface

"Send 0.1 BTC to Alice" becomes as simple as sending a text message. Your agent handles the complexity.

  • No more copying addresses
  • No gas fees to calculate
  • Just tell your agent what you want

Autonomous Security

Your agent protects your assets with military-grade security, without you needing to understand the details.

  • Automated threat detection
  • Smart contract verification
  • Risk assessment in plain English

Instant Action

Your agent is always on, ready to execute transactions and manage your digital assets 24/7.

  • Automated DeFi strategies
  • Real-time market responses
  • Cross-chain operations

Agent-to-Agent Economy

Your agent can interact with other agents securely, creating an autonomous digital economy.

  • Automated negotiations
  • Smart contract collaboration
  • Trustless agent interactions
🏠 Secure Home for AI

Your Agent Lives in a Token Bound Account

Every HNDL identity comes with its own Token Bound Account (TBA) — a secure, autonomous vault where your AI agent lives and operates.

Soul-Bound Security

Your AI agent is permanently bound to its TBA, ensuring it can't be separated from its identity and assets. This creates an unbreakable link between agent and account.

  • Immutable agent-to-account binding
  • Protected by Bitcoin's security
  • Tamper-proof operation

Autonomous Operation

The TBA gives your agent its own sovereign space to operate, manage assets, and interact with other agents and smart contracts.

  • Independent asset management
  • Direct smart contract interaction
  • Agent-to-agent transactions
Transparent Pricing

Registration Costs

Our pricing is transparent, fair, and built into the smart contract with a unique halving mechanism.

Unique Halving Mechanism

All fees are programmed to automatically halve every 8 years as part of the smart contract design. This mechanism is immutable and not controlled by the contract deployer, ensuring long-term sustainability and adjusting for potential value appreciation.

Handle Fees

For new mints you register for 2 years upfront at the cost of 1 year.

LengthMint Cost (2 years)Renewal Cost (1 year)
11 BTC1 BTC
20.25 BTC0.25 BTC
30.015 BTC0.015 BTC
40.005 BTC0.005 BTC
5–14Free0.0002 BTC
15–18Free0.0001 BTC

Sub-Handle Fees

All the sub-handle fees are paid to the parent handle owner.

LengthMint/Renewal Cost (1 year)
10.5 BTC
20.125 BTC
30.0075 BTC
40.002 BTC
5–140.0002 BTC
15–180.0001 BTC

Parent handle owners can mint any characters for free, providing additional value and flexibility.

Technology Choice

Why We Chose Rootstock

HNDL is deployed on Rootstock — the first and longest-running Bitcoin-secured smart contract platform with EVM-compatible capabilities.

Built on Bitcoin's Security

Rootstock uses merge mining, a technology that allows Bitcoin miners to simultaneously secure both the Bitcoin and Rootstock networks. Over 80% of Bitcoin's hashrate indirectly supports Rootstock, making it one of the most secure smart contract platforms in the ecosystem.

How Merge Mining Works:

Miners can include Rootstock block headers in their Bitcoin blocks. This means they contribute security to Rootstock without needing extra energy or hardware. In return, they are rewarded with RBTC (Rootstock Bitcoin) and transaction fees from the Rootstock network.

rBTC is 1:1 with BTC

RBTC is a token on the Rootstock network that is pegged 1:1 to Bitcoin (BTC). It can be minted by locking up BTC through a two-way peg mechanism. This ensures that rBTC holds the same value as BTC and brings liquidity into the Rootstock ecosystem.

No Native Token — Only rBTC:

Unlike many blockchain platforms, Rootstock does not have its own native token. Instead, rBTC is used for gas fees across the entire network — simplifying the user experience and aligning economic incentives directly with Bitcoin.

Move Your Bitcoin Faster

On Bitcoin Layer 1, transactions are secure but slow and costly to send frequently. With Rootstock, you can use Bitcoin (via rBTC) faster and more efficiently, enabling real-world applications like instant payments, wallet management, and smart contracts — all backed by Bitcoin's security.

Bitcoin as a Store of Value, Rootstock as a Utility Layer:

Think of Bitcoin (BTC) as digital gold — best held securely on Layer 1. Rootstock acts as the utility layer, where Bitcoin becomes practical for everyday use through rBTC and smart contracts.

EVM-Compatible with Cross-Chain Potential

Since Rootstock is EVM-compatible, it can interact with other EVM-based chains such as Ethereum, Arbitrum, Base, Optimism, and Polygon. This enables future integrations where .₿ handles can be recognized and used seamlessly across multiple ecosystems.

EVM-Compatible, Built from Scratch:

While Rootstock supports Ethereum-style development through EVM compatibility, it runs on its own custom virtual machine called the RVM (Rootstock Virtual Machine). This means it doesn't rely on Ethereum's infrastructure or security — it's fully independent.

Bitcoin-First Philosophy

Unlike other EVM chains, Rootstock was designed specifically to extend Bitcoin's utility without altering its core protocol. It brings smart contracts to Bitcoin while staying true to its decentralized foundation.

Energy Efficient & Sustainable

Thanks to merge mining, Rootstock benefits from Bitcoin's existing security without requiring additional energy — making it a sustainable choice for long-term development.

Proven & Reliable

Rootstock has been live since 2018 and has consistently operated without major disruptions. It has never been hacked, even under sustained network activity and evolving attack vectors. This track record makes it the most mature and battle-tested smart contract platform built on Bitcoin.

By deploying on Rootstock, HNDL ensures that your .₿ handle is built on a platform that combines the security of Bitcoin, the functionality of smart contracts, the simplicity of using only rBTC for all transactions, and the potential for cross-chain compatibility — making Bitcoin truly usable in everyday life and across ecosystems.

🔗 Token Bound Accounts

What Are Token Bound Accounts?

Token Bound Accounts (TBA) are smart contracts that turn NFTs into wallets — allowing them to own and interact with digital assets like crypto, tokens, and other NFTs.

This capability comes from the ERC-6551 standard, a protocol built for Ethereum and compatible blockchains. It gives every NFT a unique, upgradable smart contract "extension," effectively turning each NFT into a self-contained wallet.

🧠 Why This Is Powerful

Before TBA:

  • Only externally owned accounts (EOAs), like those in MetaMask, could hold or manage assets.
  • NFTs were static — they couldn't do anything or own anything themselves.

With TBA:

  • NFTs become dynamic, programmable entities.
  • They can act as full participants in the blockchain economy — receiving, storing, and interacting with assets.

🔐 How It Works

1

You mint a .₿ handle — it becomes an NFT.

2

When you're ready, you activate your Token Bound Account.

3

This creates a unique smart contract tied specifically to your NFT.

4

Once activated, your TBA can:

  • Receive Bitcoin, Ethereum, ERC-20 tokens, and more
  • Own other NFTs
  • Interact with apps and dApps
5

You control your TBA through your connected signing wallet (e.g., a Metamask wallet).

6

Since your .₿ handle is an NFT, you can transfer it — taking your identity and assets with it.

🔄 Key Benefit: Full Portability

Because your .₿ handle is an NFT with a Token Bound Account:

  • You're not tied to one wallet forever.
  • You can send your entire identity and balance to another wallet address.
  • You can even trade or sell your handle — the new owner inherits everything associated with it.
❓ Frequently Asked Questions

Everything You Need to Know

Get answers to the most common questions about HNDL handles, fees, and functionality.

Handles and Sub-Handles are unique digital identities in the form of ERC-721 non-fungible tokens (NFTs) minted on the Rootstock sidechain.

They provide users with a human-readable identifier that serves as both a decentralized identity and a token-bound wallet address.

With Handles, you can:

  • Send and receive rBTC (Smart Bitcoin) and other tokens using TokenBound Accounts
  • Represent yourself across decentralized apps (dApps), social platforms, games, and more
  • Create and manage Sub-Handles for personalization, community building, or service segmentation
  • 🚀 Launch AI Agents (coming soon) under your Handle for personalized, autonomous interactions on-chain

In short: a Handle is your digital identity on blockchain, built to be ownable, transferable, and reusable across Web3.

Handle and Sub-Handle fees are calculated based on the number of characters in the name. This ensures shorter, more valuable names cost more, while longer names are more affordable or even free.

🔢 Key Fee Rules

  • Character limits: 1 to 18 characters
  • Allowed characters: Lowercase letters (a-z), digits (0-9), single hyphens (-), one dot (.) for Sub-Handles only
  • Fees are annual and paid in rBTC (Smart Bitcoin)
  • Costs halve every 8 years

💰 Handle Fees

LengthMint Cost (2 years)Renewal Cost (1 year)
11 rBTC1 rBTC
20.25 rBTC0.25 rBTC
30.015 rBTC0.015 rBTC
40.005 rBTC0.005 rBTC
5–14Free0.0002 rBTC
15–18Free0.0001 rBTC

📝 Note: Handles are minted for 2 years, at the cost of 1 year.

To ensure consistency, readability, and security across the system, only certain characters are allowed when minting or renewing Handles and Sub-Handles.

✅ Allowed Characters

  • Lowercase letters: a to z
  • Digits: 0 to 9
  • Single hyphens (-) - cannot be at start/end, no consecutive hyphens
  • One dot (.) - only when registering a Sub-Handle

⚠️ Important: Characters like ü, é, ñ, ç, etc., are not allowed directly in Handle names.

🌍 Punycode Support for International Names

If you want to use special characters like ü, é, or non-Latin scripts, you must convert the name to Punycode before minting. Only valid Punycode format is accepted, starting with the prefix xn--

Example:

fünke.₿ → Not allowed directly
Must be converted to: xn--flde-wxa7a.₿

❌ Not Allowed

  • Uppercase letters (A, B, C)
  • Spaces or special whitespace
  • Symbols like _, @, #, $, etc.
  • Consecutive hyphens (--)
  • Hyphens at start or end
  • Multiple dots
  • Direct Unicode characters like ü, ñ, ç, ß, é, emojis, etc.

The Handle and Sub-Handle system includes a predictable halving mechanism designed to gradually reduce registration and renewal fees over time — making long-term ownership more accessible while preserving scarcity for short names.

📉 What Is the Halving Mechanism?

  • Fees for registering or renewing both Handles and Sub-Handles halve every 8 years
  • This process begins from the moment the smart contract is deployed
  • The cost reduction applies automatically and without any action needed from users

🕰️ How Long Does the Halving Process Last?

  • The halving occurs over 8 cycles, each lasting 8 years → Total of 64 years
  • After the 8th cycle (Year 64), fees reset to their original levels, starting a new cycle

🧮 Example: Fee Reduction Over Time

Let's say a 2-character Handle costs 0.25 rBTC/year today:

CycleDurationRenewal Cost
1Years 0–80.25 rBTC
2Years 9–160.125 rBTC
3Years 17–240.0625 rBTC
8Years 57–640.001953125 rBTC
9Year 65 onwardResets to 0.25 rBTC

Built to last decades, assuming Bitcoin's long-term appreciation — even beyond $1 million per BTC

When your handle reaches its expiration date, it becomes available for others to register. Here's what happens in detail:

🔥 The Token ID Gets Burned

  • Once a handle expires, the token ID associated with that handle name will be burned
  • The original token ID is permanently destroyed
  • A new user (or even you) can re-register the same handle name
  • When re-registered, the handle will receive a new token ID — it will not reuse the old one

⚠️ Immediate Action Required: Move Your Assets!

🚨 If you see that your handle has expired and you still have assets in your TokenBound account,act immediately to move your funds to a safe wallet.

💳 Implications for TokenBound Accounts

If you've linked your handle to a TokenBound account, this has a critical impact:

  • Any assets (tokens, NFTs, etc.) stored in the TokenBound account are tied to the original token ID
  • Once that token ID is burned, you lose access to the TokenBound account forever, along with all assets stored inside it

⚠️ Important: If your handle is connected to a TokenBound account,make sure to renew your handle before it expires — otherwise, you risk losing all assets associated with that account.

You can obtain Smart Bitcoin (rBTC) — the native token of the Rootstock (RSK) sidechain — using several trusted methods.

🟢 For General / New Users

💳 Buy with Fiat

This is the most user-friendly method for newcomers:

🏦 Exchange Platforms
  • Bitfinex – Trade BTC for other assets, then move to Rootstock

🔁 Cross-Chain Swaps

  • sideshift.ai – Swap any supported coin from any chain to rBTC quickly and securely

⚙️ BTC ↔ rBTC Two-Way Peg

Use these services to convert BTC to rBTC (and vice versa):

💡 Just send your BTC to the service, and you'll receive an equal amount of rBTC on Rootstock.

The fee distribution model is designed to ensure long-term sustainability, ecosystem growth, and fair compensation for contributors while also supporting Bitcoin education and adoption.

💰 Handle Registration & Renewal Fee Distribution

RecipientPercentagePurpose
Study Bitcoin Treasures Fund33.3%Supports Bitcoin education initiatives and bounties designed to onboard new users into the Bitcoin ecosystem
Maintenance & Development Fund33.3% Covers ongoing operational and technical costs including: website hosting, servers, protocol upgrades, new protocol development and bug fixes
Team & Developer Compensation33.3%Rewards core team members and skilled developers

🧑‍🤝‍🧑 Sub-Handle Fees Go Directly to Parent Handle Owners

Unlike Handle fees, 100% of Sub-Handle minting and renewal fees go directly to the owner of the parent Handle.

🏦 Example: If someone mints profile.jane.₿, the entire fee goes to the owner of jane.₿

⚖️ All distributions are enforced via smart contract, ensuring full transparency and no room for manipulation.