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Webhooks

Configure webhooks for events that occur in the platform. This page covers platform events
If you want to refer organization webhook events, check the docs here​

Configuration

To enable webhooks, you can configure WEBHOOK_URL and WEBHOOK_SECRET environment variables and you will start receiving the following events.

Platform Events

USER_REGISTER_SUCCESS

Triggered whenever a user registration is successful.
  • user_id: The unique identifier of the registered user.
  • user_email: The email address of the registered user.
Sample Payload:
{
"version": 1,
"event": "USER_REGISTER_SUCCESS",
"payload": {
"user_id": "1234abcd",
"user_email": "[email protected]"
}
}

APOLLO_MIGRATE_INIT

Triggered when graph migration is initiated.
actor_id (optional): The identifier of the actor initializing the migration
Sample Payload:
{
"version": 1,
"event": "APOLLO_MIGRATE_INIT",
"payload": {
"actor_id": "user5678"
}
}

APOLLO_MIGRATE_SUCCESS

Triggered when graph migration succeeds.
  • federated_graph: An object representing the federated graph details.
    • id: The unique identifier for the federated graph.
    • name: The name of the federated graph.
  • actor_id (optional): The identifier of the actor initializing the migration.
Sample Payload:
{
"version": 1,
"event": "GRAPH_MIGRATE_SUCCESS",
"payload": {
"federated_graph": {
"id": "graph123",
"name": "MainGraph"
},
"actor_id": "user5678"
}
}

Verification

To ensure the webhook data is coming from a trusted source and hasn't been tampered with during transit, we employ HMAC signatures. When setting up a webhook, you provide a secret. This secret is used to compute a signature that is sent along with each webhook request.
The header containing this signature is X-Cosmo-Signature-256.

Verification Example

To verify the webhook request, you need to compute the HMAC signature on your server and compare it to the signature in the X-Cosmo-Signature-256 header.
Here's an example in Node.js:
import crypto from 'crypto';
​
function verifySignature(body, receivedSignature, secret) {
const computedSignature = crypto
.createHmac('sha256', secret)
.update(body)
.digest('hex');
​
return computedSignature === receivedSignature;
}
​
// Usage:
const isVerified = verifySignature(JSON.stringify(req.body), req.headers['x-cosmo-signature-256'], YOUR_SECRET);
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Last modified 2mo ago