Sheet 1 of 5
Use case, AI agents
Let AI agents handle money, inside the scope you set.
An agent gets its own key in a JOIN capsule, the rights you choose and a scope it cannot leave, enforced onchain. Anything else waits for your stamp.
Its own key, never yours
Example rule
My finance agent can swap USDC to EURe and pay known suppliers, up to €5,000 a month. Anything else, ask me.
Sheet 2 of 5
Rights and scope, in one sentence
Pick what the agent may do, where, and how much. JOIN turns the sentence into permissions on the vault, like any other rule.
The rule
My treasury agent can swap and rebalance between approved strategies, up to €5,000 a month. Anything else, ask me.
Tested on your last 30 days and installed with a ticket, like any other rule.
Rights
- Allowed:Swap
- Allowed:Rebalance
- Not allowed:Pay
- Not allowed:Invest
Scope
- Vault
- Treasury
- Assets
- USDC, EURe
- Destinations
- Approved strategies only
- Limit
- €5,000 a month
Sheet 3 of 5
How it works
The agent never touches your keys. Every action goes through the same vaults, rules and stamps as the rest of your capsule.
The agent acts
Pay, swap, rebalance or invest, through the JOIN API or MCP server.
JOIN checks its rights
Action, vault, asset, counterparty and amount, enforced onchain on the vault.
- or
Inside its scope
It runs, and the ledger records it.
Outside its scope
It becomes a ticket for your stamp.
Always revocable
One ticket removes the agent’s key. Everything it did stays in the export.
Sheet 4 of 5
Three agents, one set of vaults
Procurement agent
Pays approved suppliers
“My procurement agent can pay saved suppliers up to €2,000 a month. Above that, ask me.”
Treasury agent
Swaps and rebalances
“My treasury agent can move funds between approved strategies, never anywhere else.”
Research agent
Pays per API call
“My research agent can spend up to €20 a day on approved data services.”
For platforms
Building agents for your users? Give them agent-ready vaults through the JOIN API and MCP server.
Sheet 5 of 5
Questions about agents
- Can an agent move all my money?
- No. It can only take the actions you allowed, on the vaults, assets and counterparties you chose, up to your limit. Anything else becomes a ticket for your stamp.
- How do I stop an agent?
- One ticket removes its key. Everything it did stays in the ledger and the accounting export.
- Which agents can use JOIN?
- Any agent that can call an API or an MCP server: one you build, or one from a platform you already use.
Your money, your rules. Your agents too.
Agents come next. Tell us what you would hand to one, and we will open early access in that order.