Filtering Webhook Events

Hookdeck supports filtering the webhooks events that are processed and sent to your destination. Events can be filtered using the JSON filtering syntax. Filters can be applied to both the request Headers and Body

Set or Update Filters

Filters are defined on a Webhook Connection. Within the UI you can edit or update your filter by clicking the Filters icon button

Create or Update filters

Within the modal, on the left side you'll have a reference of the last event for that connection and on the right, a JSON editor to enter your filter.

You can add filters for both the Body and the Headers. Both must fit an event for it to be accepted.

Once you have edited your filter, you can select Test Filter to test your filter against the latest event to verify the result is what you intended.

Example filter to receive only 'issues' webhook type from Github

Create or Update filters

Once a filter is active, it will be shown next to the connection

Viewing active filters

Filter Syntax

Filters support JSON or raw string boolean number and null .

For example, this event would be filtered

// Event request body
false;

// Filters
false;

JSON filter supports matching on any value (string number boolean null), on nested objects, and on arrays.

Simple Primitives

For example, you can also use the filter to events of only a given type.

{
  "type": "order/created",
  "order": {
    "id": 123
  }
}

{
  "type": "order/created"
}

Nested Objects

For example, if you wanted to receive all events where the product inventory is 0, you would:

{
  "product": {
    "title": "A product",
    "inventory": 0
  }
}

{
  "product": {
    "inventory": 0
  }
}

Arrays

Arrays are always matched partially. It's effectively the same as contains

{
  "product": {
    "title": "Gift Card",
    "tags": ["gift", "something"]
  }
}

{
  "product": {
    "tags": "gift"
  }
}

You can also match multiple items (they must all be contained)

{
  "product": {
    "title": "Gift Card",
    "tags": ["gift", "something", "another"]
  }
}

{
  "product": {
    "tags": ["gift", "something"]
  }
}

Or even nested objects

{
  "order": {
    "id": 123,
    "items": [
      {
        "id": 456,
        "title": "My product"
      }
    ]
  }
}

{
  "order": {
    "items": {
      "id": 456
    }
  }
}

Operators

Sometimes you need more than a simple equal matching. Our syntax support different operators to allow for more complex matching strategies.

Operators can be used as an object instead of the matching value.

{
  "product": {
    "title": "A product",
    "inventory": 5
  }
}

{
  "product": {
    "inventory": {
      "$lte": 10
    }
  }
}

All operators

Operator	Supported Type	Description
$gte	number, string	Greater than or equal to
$gt	number, string	Greater than
$lt	number, string	Less than
$lte	number, string	Less than or equal to
$eq	array, number, object, string	Equal (or deep equal)
$neq	array, number, object, string	Not Equal (or deep not equal)
$in	array, string	Contains
$nin	array, string	Does not contain
$startsWith	string	Starts with text

Rulesets