A time-boxed envelope with a hard amount limit. Create once. Let the agent draw from it. When the timer ends or the budget is gone, the capsule closes on its own.
The idea
You set the maximum amount and how long it stays open. The agent can draw from it any number of times until the money is gone or the clock runs out. Nothing more can leave the wallet through that capsule.
The total that can ever be drawn. Once reached, the capsule stops accepting spends.
From minutes to days. When the timer ends, remaining capacity is released automatically.
One capsule can fund many small payments. Each draw reduces the remaining balance.
The owner can close it early. Unused capacity returns to the source wallet.
The path
No complex setup. Create the envelope, let the agent spend from it, and let time or balance finish the job.
Set the max amount and the lifetime. The budget is reserved from the source wallet and locked inside the capsule.
Each spend reduces the remaining capacity. The agent never needs a new approval as long as the capsule is open and funded.
When the timer expires, the balance hits zero, or you cancel it — any leftover returns. No leftover risk stays open.
Why it exists
No open-ended access. No surprise drains. The capsule is the boundary — amount and time are fixed the moment you create it.
In practice
Anywhere an agent needs room to act — but you still want a hard stop on both money and time.
Open a capsule for a single work session. The agent can pay tools and sub-agents freely inside that window. When the session ends, so does the authority.
One task may need several small payments. A capsule funds the whole chain without asking you to approve every hop.
Hand a limited envelope to a helper bot. It can spend only what you put inside — never more, never longer than the TTL.
Trying a new workflow? Cap the downside first. If the experiment fails, the leftover simply returns.
When it closes
No matter how it ends, leftover capacity never stays trapped. The budget either runs out, times out, or is returned by you.
In one line
That is the whole idea. A sealed spend envelope with a hard ceiling and a hard deadline — so risk is decided before the first draw.
The boundary
No silent overdraft. No extended lifetime. The amount and the clock are fixed at creation. Everything the agent does stays inside that frame.
Ownership
Creating a capsule holds the budget in place. It does not hand ownership of the funds to the agent permanently.
Money leaves only when a real spend is made against the capsule. Idle capacity stays reserved until the end.
On cancel or expiry, whatever was not used comes straight back. Nothing sits in limbo.
Time-boxed. Amount-capped. Auto-closing. The agent works inside the envelope. You decide how wide it opens.
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