Introduction

Hookline is a webhook delivery service. Your app sends one event to the Hookline API. Hookline delivers it to every subscribed endpoint, retries failures, and records each attempt.

What Hookline does

• Delivers events to subscriber URLs over HTTPS.
• Retries failed deliveries with exponential backoff for up to 24 hours.
• Signs every request with HMAC so receivers can verify it.
• Keeps a searchable delivery log for 30 days.

How it works

1. Your app sends an event to POST /v1/events.
2. Hookline queues the event and returns a 202 response.
3. Hookline sends the event to each subscribed endpoint.
4. The receiver acknowledges with a 2xx status code within 5 seconds.

note

Test keys deliver events to the CLI listener only. Use a live key to reach real endpoints.

Next steps

• Follow the quick start to send your first event.
• Learn how authentication works.
• Read the events reference.
• Protect receivers with signature verification.