> ## Documentation Index
> Fetch the complete documentation index at: https://docs.posthook.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Schedule webhooks for exactly when you need them. Reliable delivery with automatic retries.

## What is Posthook?

Posthook is a simple API for scheduling webhooks. Set a time, provide a payload, and we deliver it to your endpoint. Full visibility into every hook from the dashboard.

**Send a reminder email 24 hours before a meeting:**

<CodeGroup>
  ```typescript TypeScript theme={null}
  import Posthook from '@posthook/node';
  const posthook = new Posthook('phk_your_api_key');

  const hook = await posthook.hooks.schedule({
    path: '/webhooks/meeting-reminder',
    postAt: '2026-03-14T12:00:00Z',
    data: {
      user_id: 'usr_123',
      meeting_id: 'mtg_456',
      message: 'Your meeting starts in 24 hours'
    }
  });
  ```

  ```python Python theme={null}
  from posthook import Posthook

  client = Posthook("phk_your_api_key")

  hook = client.hooks.schedule(
      "/webhooks/meeting-reminder",
      post_at="2026-03-14T12:00:00Z",
      data={
          "user_id": "usr_123",
          "meeting_id": "mtg_456",
          "message": "Your meeting starts in 24 hours"
      }
  )
  ```

  ```go Go theme={null}
  client, _ := posthook.NewClient("phk_your_api_key")

  hook, _, _ := client.Hooks.Schedule(context.Background(), &posthook.HookScheduleParams{
      Path:   "/webhooks/meeting-reminder",
      PostAt: time.Date(2026, 3, 14, 12, 0, 0, 0, time.UTC),
      Data:   map[string]string{
          "user_id":    "usr_123",
          "meeting_id": "mtg_456",
          "message":    "Your meeting starts in 24 hours",
      },
  })
  ```

  ```bash curl theme={null}
  curl -X POST https://api.posthook.io/v1/hooks \
    -H "X-API-Key: $API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "path": "/webhooks/meeting-reminder",
      "postAt": "2026-03-14T12:00:00Z",
      "data": {
        "user_id": "usr_123",
        "meeting_id": "mtg_456",
        "message": "Your meeting starts in 24 hours"
      }
    }'
  ```
</CodeGroup>

## Use Cases

Posthook replaces cron jobs and internal task queues for time-based workflows:

* **[Reminder emails](/patterns/user-engagement)** — Send onboarding drips, meeting reminders, or follow-ups at the right time.
* **[Trial expirations](/patterns/auto-expiry)** — Schedule a hook when a trial starts to check status and downgrade at expiry.
* **[Abandoned cart recovery](/patterns/user-engagement)** — Nudge users who left items in their cart after a delay.
* **[Scheduled reports](/patterns/recurring-tasks)** — Generate and deliver reports on a recurring schedule.
* **[Polling 3rd-party APIs](/patterns/polling)** — Turn any status-check API into an async webhook with recursive polling.

## When to Use Posthook

Posthook is not a job queue. It's designed for scheduled, time-based webhooks — not high-volume fire-and-forget background jobs. If you need to process thousands of jobs per minute in real time, use a dedicated queue like SQS, BullMQ, or Celery. Posthook is built for use cases where *when* something happens matters: reminders, expirations, scheduled reports, and recurring workflows.

## Core Features

Posthook is built around two primary use cases:

### 1. One-Time Callbacks

Schedule HTTP requests to be delivered at a specific time in the future. Ideal for delayed job processing, notifications, and expiration checks.

[**Start Scheduling**](/api-reference/endpoint/create-hook)

### 2. Recurring Workflows (Sequences)

Chain multiple hooks together to create complex, time-based workflows. Sequences allow you to run steps in parallel or series, handle dependencies, and schedule recurring jobs.

[**Learn about Sequences**](/essentials/sequences)

## Platform Features

<CardGroup cols={2}>
  <Card title="At-Least-Once Delivery" icon="shield-check" href="/essentials/receiving-webhooks">
    Automatic retries with configurable backoff ensure your hooks always arrive.
  </Card>

  <Card title="Signature Verification" icon="fingerprint" href="/essentials/security">
    Cryptographic signatures on every request so you can verify authenticity.
  </Card>

  <Card title="Local Development" icon="terminal" href="/essentials/local-development">
    Receive hooks on localhost with the CLI — no tunneling tools needed.
  </Card>

  <Card title="Real-Time Dashboard" icon="eye" href="https://posthook.io/app/home">
    Inspect payloads, track delivery status, and debug failures in real-time.
  </Card>

  <Card title="Config-as-Code" icon="file-code" href="/essentials/config-as-code">
    Define sequences and settings in version-controlled TOML.
  </Card>
</CardGroup>

## Getting Started

Ready to start scheduling?

<CardGroup cols={2}>
  <Card title="Quickstart" icon="bolt" href="/quickstart">
    Send your first scheduled webhook in under 2 minutes.
  </Card>

  <Card title="How Posthook Works" icon="diagram-project" href="/essentials/how-it-works">
    Understand the hook lifecycle from scheduling to delivery.
  </Card>
</CardGroup>