# Timer

- Human page: https://happytails.ai/en/date-time-tools/timer/
- Markdown: https://happytails.ai/en/date-time-tools/timer.md
- Structured JSON: https://happytails.ai/agents/en/date-time-tools/timer/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `timer` |
| Category | date-time-tools |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Use the visible action or interactive controls. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | Not callable through HTTP. |
| Browser-agent interface | No callable WebMCP interface. |

### Implementation notes

Keep the page open. Background tabs and sleeping devices can delay completion notifications.

### Inputs and settings

No free-text input is required. Use the file inputs and/or settings below.

No additional settings are declared for this tool.

### Planning specification

Keyboard controls and elapsed-time correction; explain background-tab alarm limits.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "timer",
  "category": "date-time-tools",
  "built": true,
  "requirements": "Keyboard controls and elapsed-time correction; explain background-tab alarm limits.",
  "implementation": {
    "fields": [],
    "input": false,
    "note": "Keep the page open. Background tabs and sleeping devices can delay completion notifications.",
    "experience": {
      "automatic": false,
      "single": false,
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 1,000,000 characters. Review the settings before running.",
      "action": null
    },
    "mode": "explicit",
    "interactive": true
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": false,
    "name": null,
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}
```

## Page guide

Set a countdown in seconds.

## Useful next steps

- [Stopwatch](https://happytails.ai/en/date-time-tools/stopwatch/): Measure elapsed time and take lap readings. ([Markdown](https://happytails.ai/en/date-time-tools/stopwatch.md))

## How to use Timer

1. Enter the number of seconds.
2. Choose Start to begin the countdown.
3. Read the completion notice, or choose Stop to end the timer early.

## What to expect

Set a countdown in seconds. Use a whole number from 1 to 86,400 seconds. Sleeping devices or background tabs may delay the completion notice.