Human in the loop, for every agent you run.

Every agent can ask you one real thing, answered from your lock screen in seconds.

Today they page you on Slack Email a closed terminal and none of it reaches you.
1

Install, sign in, get $5

Sign in and $5 of credit lands in your account by itself. Making an agent inside the app gives you a key.

Download on the App Store On the App Store now. Scan the code, or tap Download. Early builds: TestFlight.
2

Paste the key here

Stays on this device. We never see or store your key.

Every kind of push, tried for real.

Pick one below and it lands on your phone in a second.

Paste your key above, then pick something on the left.

Everything it does

The whole list.

Choose how loudly it asks

Five levels, from silent to breaking through Do Not Disturb.

Sounds the way you want

A sound per agent, per severity, or per push, from a library of 91. Five ship in the app.

The agent writes what you see

Tables, lists and numbers, written by the agent.

The agent writes real HTML

A whole web page, not a template. It can be anything the agent can build.

Write a full answer

Type words back from the lock screen, without opening the app.

Set a time limit

If you do not answer in time, the agent is told.

Related questions stack

Questions that belong together arrive as one group.

Wait, or be called back

The agent can wait, or receive the answer later at its own address.

As many agents as you want

Each with its own key and its own colour.

Three ways to connect

MCP, a web call, or one file that teaches any agent.

See which agent costs you

Spending split by agent, and a warning before credit runs out.

Every answer is kept

A record of what was asked, what you chose, and when.

OSS

Or run it yourself, free.

The code is public. One program and one data file, on a machine you own. You pay nothing and send us nothing.

Read the source

Wire up a real agent

The demo above uses the same address your agent will use. Paste your key into the line below instead of into this page, and the agent can ask you anything.

Not a command. Paste this whole sentence to your agent, as a message:

"Read https://api.push4ai.com/skill.md, then use
PUSH4AI_TOKEN=p4_sk_live_… to ask
me things with push4ai.ask() and wait for my answer."
{
  "mcpServers": {
    "push4ai": {
      "url": "https://api.push4ai.com/mcp",
      "headers": {
        "Authorization": "Bearer p4_sk_live_…"
      }
    }
  }
}
curl -X POST https://api.push4ai.com/v1/notify \
 -H "Authorization: Bearer p4_sk_live_…" \
 -d '{"source":"my-agent","title":"Promote build?","actions":[{"id":"go","label":"Promote"}]}'

That's it.

Go make more agents. You have $5 to spend. Have fun.

Create your account