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Version: v0.17.3

Webhook Exporter

The Webhook exporter will collect the data and send them via an HTTP POST request to the specified endpoint. Everytime the FlushInterval or MaxEventInMemory is reached a new call is performed.

::info If for some reason the call failed, we will keep the data in memory and retry to add the next time we reach FlushInterval or MaxEventInMemory. :::

Configuration example

// ...
DataExporter: ffclient.DataExporter{
// ...
Exporter: &ffexporter.Webhook{
EndpointURL: " https://webhook.url/",
Secret: "secret-for-signing",
Meta: map[string]string{
"extraInfo": "info",
// ...

Configuration fields

EndpointURL EndpointURL of your webhook
Secret (optional)
Secret used to sign your request body and fill the X-Hub-Signature-256 header.
See signature section for more details.
Add all the information you want to see in your request.

Webhook format

If you have configured a webhook, a POST request will be sent to the EndpointURL with a body in this format:

"meta": {
"hostname": "server01",
// ...
"events": [
"kind": "feature",
"contextKind": "anonymousUser",
"userKey": "14613538188334553206",
"creationDate": 1618909178,
"key": "test-flag",
"variation": "Default",
"value": false,
"default": false
// ...


This header X-Hub-Signature-256 is sent if the webhook is configured with a secret.
This is the HMAC hex digest of the request body, and is generated using the SHA-256 hash function and the secret as the HMAC key.


The recommendation is to always use the Secret and on your API/webook always verify the signature key to be sure that you don't have a man in the middle attack.

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