Webhook payload design in Rest API - Step-by-Step Execution

Concept Flow - Webhook payload design

Event Occurs

↓

Prepare Payload

↓

Include Essential Data

↓

Format Payload (JSON)

↓

Send Payload to Receiver

↓

Receiver Processes Payload

↓

Acknowledge Receipt

This flow shows how a webhook payload is created and sent when an event happens, then processed by the receiver.

Execution Sample

Rest API

{
  "event": "order_created",
  "data": {
    "order_id": 12345,
    "total": 99.99
  },
  "timestamp": "2024-06-01T12:00:00Z"
}

A simple webhook payload for an order creation event with order details and timestamp.

Execution Table

Step	Action	Payload Content	Reason
1	Event occurs	event: 'order_created'	Trigger webhook for new order
2	Prepare payload	Include event and data keys	Essential info for receiver
3	Add order details	order_id: 12345, total: 99.99	Provide order specifics
4	Add timestamp	timestamp: '2024-06-01T12:00:00Z'	Record when event happened
5	Format as JSON	Complete JSON object	Standard format for webhooks
6	Send payload	POST request with JSON body	Deliver data to receiver URL
7	Receiver processes	Parse JSON and act	Use data to update or notify
8	Acknowledge receipt	HTTP 200 OK	Confirm successful delivery

💡 Webhook payload sent and acknowledged, process complete

Variable Tracker

Variable	Start	After Step 2	After Step 3	After Step 4	Final
payload	{}	{"event": "order_created", "data": {}}	{"event": "order_created", "data": {"order_id": 12345, "total": 99.99}}	{"event": "order_created", "data": {"order_id": 12345, "total": 99.99}, "timestamp": "2024-06-01T12:00:00Z"}	JSON string ready to send

Key Moments - 3 Insights

Why do we include a timestamp in the webhook payload?

The timestamp shows exactly when the event happened, helping the receiver understand the timing and order of events, as seen in step 4 of the execution_table.

Why must the payload be formatted as JSON?

JSON is a standard, easy-to-read format that both sender and receiver understand, ensuring smooth data exchange, shown in step 5 of the execution_table.

What happens if the receiver does not acknowledge the webhook?

Without acknowledgment (step 8), the sender may retry sending the payload or log an error, because it cannot confirm the receiver processed the data.

Visual Quiz - 3 Questions

Look at the execution_table, what key is added to the payload at step 3?

A "data" with order details

B "event"

C "timestamp"

D "acknowledgment"

💡 Hint

Check the 'Payload Content' column at step 3 in the execution_table.

At which step does the webhook sender confirm the receiver got the payload?

A Step 7

B Step 8

C Step 6

D Step 5

💡 Hint

Look for 'Acknowledge receipt' in the 'Action' column of the execution_table.

If the event was 'user_signed_up', how would the payload change at step 2?

A event: 'order_created'

B data: {order_id: 12345}

C event: 'user_signed_up'

D timestamp removed

💡 Hint

Refer to the 'Action' and 'Payload Content' columns at step 2 in the execution_table.

Concept Snapshot

Webhook payload design:
- Trigger event starts process
- Prepare JSON payload with event, data, timestamp
- Send via POST to receiver URL
- Receiver parses and acknowledges
- Use clear, minimal, essential data
- Timestamp helps track event timing

Full Transcript

Webhook payload design starts when an event occurs, like an order creation. The system prepares a payload including the event name, relevant data such as order details, and a timestamp to record when the event happened. This payload is formatted as JSON, a common data format that is easy to read and parse. The payload is then sent via a POST request to the receiver's URL. The receiver processes the JSON data and sends back an acknowledgment, usually an HTTP 200 OK status, confirming successful receipt. Including a timestamp helps the receiver understand the timing of events. Formatting as JSON ensures compatibility. If the receiver does not acknowledge, the sender may retry or log an error. This process ensures reliable and clear communication between systems using webhooks.