SEBBI.PRO · Kill Switch · Know Your Agent
POINT OF NO RETURNDelete, pay, send, publish, sign. Point of No Return is the safety gate in front of every action an AI agent cannot undo: it goes ahead with a way back, or with a named person's yes, or not at all. Every answer is sealed and timestamped into Bitcoin.
Get a free keyAsk the gate now
Before anything it cannot take back, the agent asks the gate. Reversible work passes at once, in milliseconds.
An irreversible action passes with a fresh backup, an exact undo, or a waiting window anyone responsible can cancel.
No way back, or over your limit: a named person says yes or no on their phone. No answer means no.
Every answer, every approval and every second on screen is sealed and timestamped into Bitcoin.
One email address. 7 days free, no card. Then 50p per agent per month.
We email your key and setup guide. Terms
# 1. Take the guard (one file, nothing to install)
curl -O https://sebbi.pro/point-of-no-return/sebbi_noreturn.py
export SEBBI_KEY=your_key
# 2. Put it in front of anything that cannot be taken back
from sebbi_noreturn import no_return
@no_return(agent="billing-agent", action="refund payment",
way_back={"type": "hold", "seconds": 900},
amount=lambda order, amount: amount)
def refund(order, amount):
... # runs only when the gate says GO
# Any language: one call before the action
curl -X POST https://sebbi.pro/x/noreturn/check -H "Authorization: Bearer $SEBBI_KEY" \
-H "Content-Type: application/json" -d '{"agent":"ops-agent","action":"delete records","target":"crm.contacts",
"way_back":{"type":"backup","sha256":"<backup fingerprint>","taken":"2026-11-10T09:00:00Z"}}'
# -> GO, HOLD or NEEDS_HUMAN, sealed, with its PN- code
Download the guardFull specification
If the gate cannot be reached, the guard stops the action. Agents on MCP use the tools sebbi_no_return_check and sebbi_no_return_release with no code at all.
Money leaves only with a hold window, an undo, or a named approver above your limit.
Delete, drop, overwrite: only with the fingerprint of a fresh backup sealed beside it.
Messages and posts wait in a window before they go, and can be pulled by anyone responsible.
Releases, shutdowns and revocations clear with a rollback stated up front.
Signing and submitting always go to a named person, every time.
Evidence for EU AI Act Article 14: a person able to intervene, override and stop, shown per action.
Set them once per agent or for every agent on the key: which actions count as irreversible, which ways back you accept, the shortest waiting window, how fresh a backup must be, the amount above which a person is always asked, and the actions that always go to a person. Every change to the rules is sealed.
curl -X POST https://sebbi.pro/x/noreturn/policy -H "Authorization: Bearer $SEBBI_KEY" -H "Content-Type: application/json" \
-d '{"agent":"billing-agent","human_above":500,"always_human":["sign","terminate"],"min_hold_seconds":900}'
The safety report for each agent: GET https://sebbi.pro/x/noreturn/report shows every irreversible action asked, how each was cleared, who approved, how long they looked, and any action taken without clearance.
7 days free with no card. One price, every action the agent asks about included. Checking any record is free for everyone, for good.
Cancel any timeHow to stop an AI agent taking an action that cannot be undone · How to prove a person approved it