Callback Webhooks

Callback webhooks allow Agent Loops to send results to external systems when execution completes. Use callbacks to integrate agent workflows with your applications, trigger subsequent actions, or deliver reports.

Overview

A callback is an HTTP POST request sent to your specified endpoint when an Agent Loop finishes:

Agent Loop Executes → Completes Task → Sends POST to Your Webhook

Your webhook receives the agent’s output and can process it however needed.

Configuring Callbacks

Create/Edit Agent Loop

Open the agent loop you want to configure.

Find Callback Section

Scroll to the Callback Webhook configuration section.

Enter Webhook URL

Provide your webhook endpoint:

https://your-domain.com/agent-results

Add Headers (Optional)

Include authentication or custom headers:

Authorization: Bearer YOUR_TOKEN
X-Custom-Header: value

Save

Click Save to enable callbacks.

Callback Payload

Your webhook receives a POST request with this JSON structure:

{
  "agent_loop_id": "loop_abc123",
  "agent_loop_name": "Daily Sales Report",
  "execution_id": "exec_xyz789",
  "status": "completed",
  "result": {
    "output": "Sales Report for January 15, 2024\n\nTotal Revenue: $12,450...",
    "iterations_used": 5,
    "tool_calls": 3
  },
  "metadata": {
    "started_at": "2024-01-15T10:00:00Z",
    "completed_at": "2024-01-15T10:02:30Z",
    "duration_seconds": 150,
    "model": "gpt-4",
    "tokens_used": 1250
  },
  "error": null
}

Payload Fields

Field	Type	Description
`agent_loop_id`	string	Unique agent loop identifier
`agent_loop_name`	string	Display name of the agent loop
`execution_id`	string	Unique execution identifier
`status`	string	`completed`, `failed`, or `timeout`
`result.output`	string	The agent’s final response
`result.iterations_used`	number	Reasoning steps taken
`result.tool_calls`	number	Tools used during execution
`metadata`	object	Execution timing and stats
`error`	string/null	Error message if failed

Status Values

completed: Agent successfully finished the task

{
  "status": "completed",
  "result": { "output": "..." },
  "error": null
}

failed: Agent encountered an error

{
  "status": "failed",
  "result": null,
  "error": "Tool call failed: HTTP 500 from API"
}

timeout: Execution exceeded time limit

{
  "status": "timeout",
  "result": { "output": "Partial result..." },
  "error": "Execution timeout after 300 seconds"
}

Implementing a Callback Webhook

Example: Node.js/Express

const express = require('express');
const app = express();
app.use(express.json());

app.post('/agent-results', (req, res) => {
  const {
    agent_loop_id,
    agent_loop_name,
    status,
    result,
    error
  } = req.body;

  console.log(`Agent Loop "${agent_loop_name}" ${status}`);

  if (status === 'completed') {
    // Process successful result
    const output = result.output;

    // Example: Send to Slack
    sendToSlack({
      text: `Agent Report:\n\n${output}`
    });

    // Example: Save to database
    database.saveReport({
      agent_loop_id,
      output,
      created_at: new Date()
    });

  } else if (status === 'failed') {
    // Handle error
    console.error(`Agent failed: ${error}`);

    // Send alert
    sendAlert({
      title: 'Agent Loop Failed',
      message: error
    });
  }

  // Acknowledge receipt
  res.json({ received: true });
});

app.listen(3000);

Example: Python/Flask

from flask import Flask, request, jsonify
import requests

app = Flask(__name__)

@app.route('/agent-results', methods=['POST'])
def agent_callback():
    data = request.json

    agent_name = data['agent_loop_name']
    status = data['status']

    if status == 'completed':
        output = data['result']['output']

        # Send to Slack
        slack_webhook_url = 'https://hooks.slack.com/services/YOUR/WEBHOOK/URL'
        requests.post(slack_webhook_url, json={
            'text': f'Agent Report from {agent_name}:\n\n{output}'
        })

        # Log to file
        with open('agent_reports.txt', 'a') as f:
            f.write(f'\n\n=== {agent_name} ===\n{output}\n')

    elif status == 'failed':
        error = data['error']
        print(f'Agent {agent_name} failed: {error}')

    return jsonify({'received': True})

if __name__ == '__main__':
    app.run(port=3000)

Response Expected

Your webhook should return a JSON response with HTTP 200 status:

{
  "received": true
}

Optional fields:

{
  "received": true,
  "processed": true,
  "message": "Report saved successfully"
}

If your webhook returns an error status (4xx or 5xx), the callback will be retried (coming soon).

Use Cases

Send to Messaging Platforms

Forward agent results to Slack, Teams, or Discord:

async function sendToSlack(output) {
  await fetch(process.env.SLACK_WEBHOOK_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      text: output,
      username: 'Agent Bot',
      icon_emoji: ':robot_face:'
    })
  });
}

Save to Database

Store results for historical tracking:

async function saveToDatabase(data) {
  await db.agentResults.insert({
    agent_loop_id: data.agent_loop_id,
    execution_id: data.execution_id,
    output: data.result.output,
    status: data.status,
    created_at: new Date(data.metadata.completed_at)
  });
}

Trigger Workflows

Start additional workflows based on results:

if (result.output.includes('ERROR')) {
  // Trigger incident response
  await createIncident({
    title: 'Agent Loop Error Detected',
    description: result.output
  });
}

Send Emails

Email reports to stakeholders:

if (status === 'completed') {
  await sendEmail({
    to: 'team@company.com',
    subject: `Daily Report from ${agent_loop_name}`,
    body: result.output
  });
}

Security

Use HTTPS

Always use HTTPS endpoints for callbacks

Authenticate Requests

Verify requests come from Chatbot Platform

Validate Payload

Check payload structure before processing

Rate Limiting

Implement rate limits on your endpoint

Authenticating Callbacks

Add a secret token to callback headers: Agent Loop Configuration:

Callback URL: https://your-domain.com/agent-results
Headers:
  X-Webhook-Secret: your-secret-token-here

Your Webhook:

app.post('/agent-results', (req, res) => {
  const secret = req.headers['x-webhook-secret'];

  if (secret !== process.env.WEBHOOK_SECRET) {
    return res.status(401).json({ error: 'Unauthorized' });
  }

  // Process callback...
});

Request Signature (Coming Soon)

Future support for HMAC-SHA256 signature verification:

X-Signature: sha256=abc123...

Your webhook would verify the signature matches the payload.

Testing Callbacks

Manual Testing

Use a service like webhook.site:

Create Test Endpoint

Go to webhook.site and copy your unique URL.

Configure Agent Loop

Set the webhook.site URL as your callback URL.

Run Agent Loop

Execute the agent loop manually.

View Request

Check webhook.site to see the callback payload.

Local Testing with Ngrok

Test with your local development server:

Start Ngrok

ngrok http 3000

Use Ngrok URL

Configure agent loop with the ngrok URL:

https://abc123.ngrok.io/agent-results

Run Agent

Execute and receive callback on your local server.

Troubleshooting

Callback Not Received

Check:

Callback URL is correct and accessible
Your endpoint is running
Firewall allows incoming requests
Agent loop completed successfully

Callback Failed

Check:

Endpoint returns 200 status
Response is valid JSON
No timeout on your endpoint
Check execution logs for details

Duplicate Callbacks

If you receive multiple callbacks:

Check for retry logic (future feature)
Verify webhook is not called multiple times in your code
Use execution_id to deduplicate

Best Practices

Always respond with HTTP 200 status quickly. Process the callback data asynchronously if it takes time.

Do:

Return 200 immediately
Process data in background jobs
Log all callbacks for debugging
Validate payload structure
Handle errors gracefully

Don’t:

Perform long operations synchronously
Return errors for non-critical issues
Skip authentication
Assume payload structure won’t change

Async Processing Pattern

app.post('/agent-results', async (req, res) => {
  const data = req.body;

  // Immediately acknowledge
  res.json({ received: true });

  // Process asynchronously
  processCallback(data).catch(err => {
    console.error('Callback processing failed:', err);
  });
});

async function processCallback(data) {
  // Long-running operations here
  await saveToDatabase(data);
  await sendNotifications(data);
  await triggerWorkflows(data);
}

Get Started

Bots

Agent Loops

MCP Servers

Use Cases

Overview

Configuring Callbacks

Callback Payload

Payload Fields

Status Values

Implementing a Callback Webhook

Example: Node.js/Express

Example: Python/Flask

Response Expected

Use Cases

Send to Messaging Platforms

Save to Database

Trigger Workflows

Send Emails

Security

Use HTTPS

Authenticate Requests

Validate Payload

Rate Limiting

Authenticating Callbacks

Request Signature (Coming Soon)

Testing Callbacks

Manual Testing

Local Testing with Ngrok

Troubleshooting

Callback Not Received

Callback Failed

Duplicate Callbacks

Best Practices

Async Processing Pattern

Next Steps

Getting Started

MCP Servers

Get Started

Bots

Agent Loops

MCP Servers

Use Cases

​Overview

​Configuring Callbacks

​Callback Payload

​Payload Fields

​Status Values

​Implementing a Callback Webhook

​Example: Node.js/Express

​Example: Python/Flask

​Response Expected

​Use Cases

​Send to Messaging Platforms

​Save to Database

​Trigger Workflows

​Send Emails

​Security

Use HTTPS

Authenticate Requests

Validate Payload

Rate Limiting

​Authenticating Callbacks

​Request Signature (Coming Soon)

​Testing Callbacks

​Manual Testing

​Local Testing with Ngrok

​Troubleshooting

​Callback Not Received

​Callback Failed

​Duplicate Callbacks

​Best Practices

​Async Processing Pattern

​Next Steps

Getting Started

MCP Servers

Overview

Configuring Callbacks

Callback Payload

Payload Fields

Status Values

Implementing a Callback Webhook

Example: Node.js/Express

Example: Python/Flask

Response Expected

Use Cases

Send to Messaging Platforms

Save to Database

Trigger Workflows

Send Emails

Security

Authenticating Callbacks

Request Signature (Coming Soon)

Testing Callbacks

Manual Testing

Local Testing with Ngrok

Troubleshooting

Callback Not Received

Callback Failed

Duplicate Callbacks

Best Practices

Async Processing Pattern

Next Steps