Interesting concept, but I'm not sure of the use case where you are doing onchain payments with your agent... (fees are pretty low, so maybe it makes sense?)

A command-line tool that lets AI agents use Bitcoin safely. Agents operate within group wallets and miniscript wallets where user keys retain ultimate control — transactions above policy limits require explicit user approval.

Built for integration with AI agent frameworks. See agent-skills for ready-made skills.

• ✅ Group Wallet (m-of-n multisig)
• 🛠 Miniscript Wallet

Here's how Nunchuk describes it on X:

Most agentic wallets give the agent a standalone wallet or delegated signer.

Nunchuk takes a different path:
• shared Bitcoin wallet between a human and an agent
• your key
• agent key
• policy co-signer

The agent can act within the policy you set. Above the limit, your signature is required.
Funding a wallet and authorizing an agent are not the same decision.

The wallet can receive funds without automatically increasing what the agent can spend. Receiving is a normal wallet operation. Spending authority is configured separately through Platform key policies — limits, delays, approval flows.

What ships today:
• local key generation + encrypted key storage
• group wallets (m-of-n multisig); Miniscript support is WIP
• sandboxes, invites, joins, finalize
• fresh receive addresses
• create / sign / broadcast txs
• descriptor/BSMS export + recovery
• platform-key policies + dummy-tx approvals

They also have an agent skill (linked above).