Configure event monitors

This guide covers best practices for event monitor configuration, webhook implementation, and performance optimization.

Encountering issues? See Troubleshoot event monitors for solutions to common problems.

Choose appropriate schedules

Match schedule frequency to your data needs and budget. Each scheduled run creates a billable job.

Use Case	Schedule	Rationale
Event monitoring	Daily	Balances freshness with cost
Regulatory updates	Daily or weekly	Changes occur infrequently
Market intelligence	Daily or weekly	Adjust based on update cycles

Minimum default interval: 24 hours. Schedules more frequent depends on your subscription plan.

Schedule formats

Define schedules in natural language with explicit timezone.

Daily schedules
Weekly schedules
Multi-day intervals
sub-24h (if your plan allows it)

"every day at 12 PM UTC"
"every day at 9 AM EST"

"every Monday at 9 AM EST"
"every Friday at 5 PM GMT"

"every 2 days at 3 PM UTC"
"every 3 days at 9 AM EST"
"every 7 days at 12 PM UTC"

"every hour"
"every 6 hours"
"every 12 hours"

Common cron patterns:

Schedule	Cron Expression	Valid
`"every day at 12 PM UTC"`	`0 12 * * *`	✅ Daily
`"every Monday at 9 AM EST"`	`0 9 * * 1`	✅ Weekly
`"every 6 hours"`	`0 /6 * *`	✅ Hourly (For specific plans)

Testing procedure

Test your schedule format before production use.

Create test event monitor

Create an event monitor with your desired schedule (e.g., "every day at 3 PM UTC")

Wait for execution

Wait for the scheduled time to pass.

Verify cron expression

Check the cron_expression field:

curl "https://catchall.newscatcherapi.com/catchAll/monitors/{monitor_id}/jobs" \
  -H "x-api-key: YOUR_API_KEY"

Create production event monitor

If correct, create your production event monitor. If incorrect, adjust the schedule format.

Implement robust webhooks

Configure webhook endpoints to handle notifications reliably.

Endpoint requirements

Your webhook endpoint must:

Return 2xx status code within 5 seconds.
Be publicly accessible (not localhost or private network).
Use HTTPS (not HTTP).
Handle POST requests with JSON body.

Quick implementation

Return 200 immediately and process asynchronously to avoid timeouts:

Python
TypeScript
Java

from flask import Flask, request, jsonify
import logging

app = Flask(__name__)
logging.basicConfig(level=logging.INFO)

@app.route('/catchall/webhook', methods=['POST'])
def handle_catchall_webhook():
    try:
        # Get payload
        payload = request.json
        logging.info(f"Received webhook: {payload['monitor_id']}")

        # Return 200 immediately - process async
        process_webhook_async(payload)
        return jsonify({"status": "received"}), 200

    except Exception as e:
        logging.error(f"Webhook error: {e}")
        # Return 200 even on error to avoid retries
        return jsonify({"status": "error"}), 200

def process_webhook_async(payload):
    """Queue for background processing"""
    monitor_id = payload['monitor_id']
    records_count = payload['records_count']

    if records_count > 0:
        # Your processing logic here
        save_records(payload['records'])

import express from "express";

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

app.post("/catchall/webhook", async (req, res) => {
  try {
    // Get payload
    const payload = req.body;
    console.log(`Received webhook: ${payload.monitor_id}`);

    // Return 200 immediately
    res.status(200).json({ status: "received" });

    // Process asynchronously (don't await)
    processWebhookAsync(payload);
  } catch (error) {
    console.error("Webhook error:", error);
    // Return 200 even on error to avoid retries
    res.status(200).json({ status: "error" });
  }
});

async function processWebhookAsync(payload: any) {
  const { monitor_id, records_count } = payload;

  if (records_count > 0) {
    // Your processing logic here
    await saveRecords(payload.records);
  }
}

app.listen(3000, () => {
  console.log("Webhook server running on port 3000");
});

import org.springframework.web.bind.annotation.*;
import org.springframework.http.ResponseEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Map;
import java.util.concurrent.CompletableFuture;

@RestController
@RequestMapping("/catchall")
public class WebhookController {
    private static final Logger logger = LoggerFactory.getLogger(WebhookController.class);

    @PostMapping("/webhook")
    public ResponseEntity<Map<String, String>> handleWebhook(@RequestBody Map<String, Object> payload) {
        try {
            // Get payload
            String monitorId = (String) payload.get("monitor_id");
            logger.info("Received webhook: {}", monitorId);

            // Return 200 immediately - process async
            processWebhookAsync(payload);
            return ResponseEntity.ok(Map.of("status", "received"));

        } catch (Exception e) {
            logger.error("Webhook error: ", e);
            // Return 200 even on error to avoid retries
            return ResponseEntity.ok(Map.of("status", "error"));
        }
    }

    private void processWebhookAsync(Map<String, Object> payload) {
        CompletableFuture.runAsync(() -> {
            String monitorId = (String) payload.get("monitor_id");
            Integer recordsCount = (Integer) payload.get("records_count");

            if (recordsCount != null && recordsCount > 0) {
                // Your processing logic here
                saveRecords((List<?>) payload.get("records"));
            }
        });
    }
}

If webhooks aren’t firing, see Troubleshoot: Webhook not firing.

Show Add retry logic with exponential backoff

Implement exponential backoff for webhook processing failures:

Python
TypeScript
Java

import time

def process_webhook_with_retry(payload, max_retries=3):
    """Process webhook with exponential backoff"""
    for attempt in range(max_retries):
        try:
            # Your processing logic
            process_records(payload['records'])
            return True

        except Exception as e:
            if attempt < max_retries - 1:
                wait_time = 2 ** attempt  # Exponential backoff: 1s, 2s, 4s
                time.sleep(wait_time)
                continue
            else:
                # Log failure after all retries
                log_webhook_failure(payload, str(e))
                return False

async function processWebhookWithRetry(
  payload: any,
  maxRetries: number = 3
): Promise<boolean> {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    try {
      // Your processing logic
      await processRecords(payload.records);
      return true;
    } catch (error) {
      if (attempt < maxRetries - 1) {
        const waitTime = Math.pow(2, attempt) * 1000; // 1s, 2s, 4s
        await new Promise((resolve) => setTimeout(resolve, waitTime));
        continue;
      } else {
        // Log failure after all retries
        await logWebhookFailure(payload, error.message);
        return false;
      }
    }
  }
  return false;
}

import java.util.Map;
import java.util.List;

public boolean processWebhookWithRetry(Map<String, Object> payload, int maxRetries) {
    for (int attempt = 0; attempt < maxRetries; attempt++) {
        try {
            // Your processing logic
            processRecords((List<?>) payload.get("records"));
            return true;

        } catch (Exception e) {
            if (attempt < maxRetries - 1) {
                long waitTime = (long) Math.pow(2, attempt) * 1000; // 1s, 2s, 4s
                try {
                    Thread.sleep(waitTime);
                } catch (InterruptedException ie) {
                    Thread.currentThread().interrupt();
                    return false;
                }
            } else {
                // Log failure after all retries
                logWebhookFailure(payload, e.getMessage());
                return false;
            }
        }
    }
    return false;
}

Show Add webhook logging

Log all webhook events for debugging:

Python
TypeScript
Java

import json
from datetime import datetime

def log_webhook(payload, status):
    """Log webhook receipt and processing status"""
    log_entry = {
        "timestamp": datetime.utcnow().isoformat(),
        "monitor_id": payload['monitor_id'],
        "latest_job_id": payload['latest_job_id'],
        "records_count": payload['records_count'],
        "status": status
    }

    with open('webhook_log.jsonl', 'a') as f:
        f.write(json.dumps(log_entry) + '\n')

import * as fs from "fs";

function logWebhook(payload: any, status: string): void {
  const logEntry = {
    timestamp: new Date().toISOString(),
    monitor_id: payload.monitor_id,
    latest_job_id: payload.latest_job_id,
    records_count: payload.records_count,
    status: status,
  };

  fs.appendFileSync(
    "webhook_log.jsonl",
    JSON.stringify(logEntry) + "\n",
    "utf8"
  );
}

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.FileWriter;
import java.io.IOException;
import java.time.Instant;
import java.util.HashMap;
import java.util.Map;

public void logWebhook(Map<String, Object> payload, String status) {
    Map<String, Object> logEntry = new HashMap<>();
    logEntry.put("timestamp", Instant.now().toString());
    logEntry.put("monitor_id", payload.get("monitor_id"));
    logEntry.put("latest_job_id", payload.get("latest_job_id"));
    logEntry.put("records_count", payload.get("records_count"));
    logEntry.put("status", status);

    try (FileWriter writer = new FileWriter("webhook_log.jsonl", true)) {
        ObjectMapper mapper = new ObjectMapper();
        writer.write(mapper.writeValueAsString(logEntry) + "\n");
    } catch (IOException e) {
        logger.error("Failed to write webhook log", e);
    }
}

Update event monitor configuration

Update webhook assignments, the record limit, or the schedule for an existing event monitor without recreating it.

When to update

Update an event monitor when you need to:

Change which webhooks receive notifications
Clear all webhook assignments
Adjust the maximum records per run
Change how often or at what time the event monitor runs

The reference job cannot be modified. To change the query, create a new event monitor.

Update procedure

Get the webhook ID

If you don’t have the webhook ID, list your webhooks:

    curl "https://catchall.newscatcherapi.com/catchAll/webhooks" \
      -H "x-api-key: YOUR_API_KEY"

Send update request

curl -X PATCH "https://catchall.newscatcherapi.com/catchAll/monitors/{monitor_id}" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "webhook_ids": ["a1b2c3d4-e5f6-7890-abcd-ef1234567890"],
    "limit": 100
  }'

from newscatcher_catchall import CatchAllApi

client = CatchAllApi(api_key="YOUR_API_KEY")

response = client.monitors.update_monitor(
    monitor_id="3fec5b07-8786-46d7-9486-d43ff67eccd4",
    webhook_ids=["a1b2c3d4-e5f6-7890-abcd-ef1234567890"],
    limit=100,
)
print(f"Updated: {response.monitor_id}")

import { CatchAllApiClient } from "newscatcher-catchall-sdk";

const client = new CatchAllApiClient({ apiKey: "YOUR_API_KEY" });

const response = await client.monitors.updateMonitor({
  monitor_id: "3fec5b07-8786-46d7-9486-d43ff67eccd4",
  webhook_ids: ["a1b2c3d4-e5f6-7890-abcd-ef1234567890"],
  limit: 100,
});
console.log(`Updated: ${response.monitor_id}`);

import com.newscatcher.catchall.CatchAllApi;
import com.newscatcher.catchall.resources.monitors.requests.UpdateMonitorRequestDto;
import java.util.List;

CatchAllApi client = CatchAllApi.builder()
    .apiKey("YOUR_API_KEY")
    .build();

var response = client.monitors().updateMonitor(
    "3fec5b07-8786-46d7-9486-d43ff67eccd4",
    UpdateMonitorRequestDto.builder()
        .webhookIds(List.of("a1b2c3d4-e5f6-7890-abcd-ef1234567890"))
        .limit(100)
        .build()
);
System.out.println("Updated: " + response.getMonitorId().orElse("N/A"));

To clear all webhook assignments, pass an empty array: "webhook_ids": [].To change the schedule, pass schedule (and optionally timezone) in the same request body, for example {"schedule": "every Monday at 9 AM EST"}. The new schedule takes effect from the next scheduler reload, and the old schedule stops firing. The API returns 422 if the schedule can’t be parsed or runs would be spaced too closely. See Choose appropriate schedules for supported formats.

Verify update

List your event monitors to confirm the change took effect:

    curl "https://catchall.newscatcherapi.com/catchAll/monitors" \
      -H "x-api-key: YOUR_API_KEY"

Webhook and limit updates take effect immediately. The next scheduled execution uses the new configuration. Schedule changes apply from the next scheduler reload.

Get started

Concepts

How to

API Reference

Integrations

Libraries

Configure event monitors

Choose appropriate schedules

Schedule formats

Testing procedure

Implement robust webhooks

Endpoint requirements

Quick implementation

Update event monitor configuration

When to update

Update procedure

See also

​Choose appropriate schedules

​Schedule formats

​Testing procedure

​Implement robust webhooks

​Endpoint requirements

​Quick implementation

​Update event monitor configuration

​When to update

​Update procedure

​See also

Choose appropriate schedules

Schedule formats

Testing procedure

Implement robust webhooks

Endpoint requirements

Quick implementation

Update event monitor configuration

When to update

Update procedure

See also