Creating a webhook using the AvaCloud portal There are many websites you can use to test out webhooks. For example, you can use https://webhook.site/ and copy your unique URL. Once you have the URL, you can test using the following steps:
  1. Navigate to the Avacloud Dashboard and click on Web3 Data API
  2. Click Create Webhook
  3. Fill out the form with the unique URL generated in https://webhook.site/ and the address you want to monitor. In this example, we want to monitor USDC on the mainnet. The address for the USDC contract is the C-chain is 0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E.
  1. Click Create and go to `https://webhook.site/, you should see something like this:

​
Managing webhooks using Glacier API

You can programmatically manage webhooks using Glacier API. For example:
  1. Navigate to the Avacloud Dashboard and click on Web3 Data API
  2. Click on Add API Key
  3. Copy your API key and use it to create a webhook. For example:
curl --location 'https://glacier-api.avax.network/v1/webhooks' \
--header 'Content-Type: application/json' \
--header 'x-glacier-api-key: <YOUR_API_KEY>' \
--data '{
    "url": "https://webhook.site/af5cfd05-d104-4573-8ff0-6f11dffbf1eb",
    "chainId": "43114",
    "eventType": "address_activity",
    "metadata": {
        "addresses": ["0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E"]
    },
   "name": "Dokyo",
   "description": "Dokyo NFT"
   "includeInternalTxs": true,
   "includeLogs": True
}'
Use all Glacier methods at your convenience to create, update, delete or list the webhooks in your account.

​
Local testing with a Node.js Express app

If we want to test the webhook in our computer and we are behind a proxy/NAT device or a firewall we need a tool like Ngrok. Avacloud will trigger the webhook and make a POST to the Ngrok cloud, then the request is forwarded to your local Ngrok client who in turn forwards it to the Node.js app listening on port 8000. Go to https://ngrok.com/ create a free account, download the binary, and connect to your account. Create a Node.js app with Express and paste the following code to receive the webhook: 
const express = require('express');
const app = express();

app.post('/callback', express.json({ type: 'application/json' }), (request, response) => {
   const { body, headers } = request;
   // Handle the event
   switch (body.eventType) {
       case 'address_activity':
           console.log("*** Address_activity ***");
           console.log(body);
           break;
       // ... handle other event types
       default:
           console.log(`Unhandled event type ${body}`);
   }
   // Return a response to acknowledge receipt of the event
   response.json({ received: true });
});

const PORT = 8000;
app.listen(PORT, () => console.log(`Running on port ${PORT}`));
Run the app with the following command: 
node app.js
The Express app will be listening on port 8000. To start an HTTP tunnel forwarding to your local port 8000 with Ngrok, run this next:

./ngrok http 8000
You should see something like this: 
ngrok                                                                                                                                                                           (Ctrl+C to quit)

Take our ngrok in production survey! https://forms.gle/aXiBFWzEA36DudFn6

Session Status                online
Account                       javier.toledo@avalabs.org (Plan: Free)
Update                        update available (version 3.7.0, Ctrl-U to update)
Version                       3.5.0
Region                        United States (us)
Latency                       -
Web Interface                 http://127.0.0.1:4040
Forwarding                    https://825a-2600-1700-5220-11a0-385f-7786-5e74-32cb.ngrok-free.app -> http://localhost:8000

Connections                   ttl     opn     rt1     rt5     p50     p90
                              0       0       0.00    0.00    0.00    0.00
Copy the HTTPS forwarding URL and append the /callbackpath and type the address you want to monitor. If we transfer AVAX to the address we will detect the payment and the webhook will be triggered. Now we can receive the event on our local server. The response should be something like this: 
{
  "webhookId": "8ca68f98-18e5-47fb-a669-9ba7a6ed32b0",
  "eventType": "address_activity",
  "messageId": "ad66c866-17b4-44f7-9485-32211170da86",
  "event": {
    "transaction": {
      "blockHash": "0x924ab683b4eba825410b8f233297927aa91af9483fe2d7dd799afbe0e70ea2db",
      "blockNumber": "42776050",
      "from": "0x4962aE47413a39fe219e17679124DF0086f0C369",
      "gas": "296025",
      "gasPrice": "35489466312",
      "maxFeePerGas": "35489466312",
      "maxPriorityFeePerGas": "1500000000",
      "txHash": "0x9d3b6efae152cd17a30e5522b07d7217a9809a4a437b3269ded7474cfdecd167",
      "txStatus": "1",
      "input": "0x3593564c000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000065ef6db400000000000000000000000000000000000000000000000000000000000000020b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000009b6e64a8ec600000000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000009b6e64a8ec60000000000000000000000000000000000000000000000000001d16b69c3febc194200000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000042b31f66aa3c1e785363f0875a1b74e27b85fd66c70001f4b97ef9ef8734c71904d8002f8b6bc66dd9c48a6e000bb8d586e7f844cea2f87f50152665bcbc2c279d8d70000000000000000000000000000000000000000000000000000000000000",
      "nonce": "0",
      "to": "0x4dae2f939acf50408e13d58534ff8c2776d45265",
      "transactionIndex": 17,
      "value": "700000000000000000",
      "type": 2,
      "chainId": "43114",
      "receiptCumulativeGasUsed": "2215655",
      "receiptGasUsed": "244010",
      "receiptEffectiveGasPrice": "28211132966",
      "receiptRoot": "0x40d0ea00b2ce9e72a4bdebfbdc8dd4d73ebecbf80f1c107993eb78a5d28a44bf",
      "contractAddress": "0x0000000000000000000000000000000000000000",
      "blockTimestamp": 1710189471
    },
    "logs": [
      {
        "address": "0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7",
        "topic0": "0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c",
        "topic1": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic2": null,
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000009b6e64a8ec60000",
        "transactionIndex": 17,
        "logIndex": 39,
        "removed": false
      },
      {
        "address": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
        "topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "topic1": "0x000000000000000000000000fae3f424a0a47706811521e3ee268f00cfb5c45e",
        "topic2": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000000000000020826ca",
        "transactionIndex": 17,
        "logIndex": 40,
        "removed": false
      },
      {
        "address": "0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7",
        "topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "topic1": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic2": "0x000000000000000000000000fae3f424a0a47706811521e3ee268f00cfb5c45e",
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000009b6e64a8ec60000",
        "transactionIndex": 17,
        "logIndex": 41,
        "removed": false
      },
      {
        "address": "0xfAe3f424a0a47706811521E3ee268f00cFb5c45E",
        "topic0": "0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67",
        "topic1": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic2": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000009b6e64a8ec60000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffdf7d93600000000000000000000000000000000000000000000751b593c19962c0ca27000000000000000000000000000000000000000000000000006d2063b8b0f00effffffffffffffffffffffffffffffffffffffffffffffffffffffffffffc606b",
        "transactionIndex": 17,
        "logIndex": 42,
        "removed": false
      },
      {
        "address": "0xd586E7F844cEa2F87f50152665BCbc2C279D8d70",
        "topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "topic1": "0x000000000000000000000000a7141c79d3d4a9ad67ba95d2b97fe7eed9fb92b3",
        "topic2": "0x0000000000000000000000004962ae47413a39fe219e17679124df0086f0c369",
        "topic3": null,
        "data": "0x000000000000000000000000000000000000000000000001d75d7654d90a2700",
        "transactionIndex": 17,
        "logIndex": 43,
        "removed": false
      },
      {
        "address": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
        "topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "topic1": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic2": "0x000000000000000000000000a7141c79d3d4a9ad67ba95d2b97fe7eed9fb92b3",
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000000000000020826ca",
        "transactionIndex": 17,
        "logIndex": 44,
        "removed": false
      },
      {
        "address": "0xA7141C79d3d4a9ad67bA95D2b97Fe7EeD9fB92B3",
        "topic0": "0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67",
        "topic1": "0x0000000000000000000000004dae2f939acf50408e13d58534ff8c2776d45265",
        "topic2": "0x0000000000000000000000004962ae47413a39fe219e17679124df0086f0c369",
        "topic3": null,
        "data": "0x00000000000000000000000000000000000000000000000000000000020826cafffffffffffffffffffffffffffffffffffffffffffffffe28a289ab26f5d90000000000000000000000000000000000000f410a3539e2dfdf2b8bb00e7cab2f00000000000000000000000000000000000000000000000099a49d85f5d9286a000000000000000000000000000000000000000000000000000000000004375d",
        "transactionIndex": 17,
        "logIndex": 45,
        "removed": false
      }
    ]
  }
}