Webhook vs Polling for AI Integrations: When Each Makes Sense

Why the choice matters for AI specifically

Most integration patterns tutorials talk about webhooks and polling in the abstract. For AI integrations the choice has a concrete downstream effect: polling introduces latency between when data arrives and when the AI processes it, which directly affects the usefulness of the output. An email triage system that processes messages 20 minutes after arrival is less useful than one that processes them within 30 seconds.

On the other hand, webhooks push complexity onto your system — you need a public endpoint, you need to handle retries when your service is briefly down, and you need to be careful about replay attacks. For batch AI workflows that run once a day, that complexity is unnecessary.

The webhook case

Use webhooks when:

• Latency is user-visible. If a user takes an action and expects a result within seconds, you need to process the event as it happens. Email Triage is a useful counterexample: it polls each connected Gmail and Outlook account every five minutes through a Redis-backed job queue — simple and predictable, at the cost of up to five minutes' delay. Gmail push notifications are the upgrade path when that delay matters.
• The data source supports them. Most modern SaaS APIs (Stripe, GitHub, Twilio, Shopify, Gmail) emit webhooks. If the source already pushes events, accept them — polling the same API would be wasteful and slower.
• Event volume is moderate and spiky. Webhooks are efficient because they only fire when something happens. If you have a customer who sends 200 emails in an hour and nothing the next day, polling every minute would burn API quota for nothing.

What you need to handle with webhooks

Webhook receivers need to be production-grade. That means:

• Idempotency. Webhook providers retry on delivery failure. Your handler needs to process the same event twice without creating duplicate records or sending duplicate AI outputs.
• Fast acknowledgement. Return a 200 within 2–5 seconds. Offload the actual AI processing to a queue. If your LLM call takes 8 seconds and the webhook provider times out at 5, you’ll get retries on every single request.
• Signature verification. Verify the X-Webhook-Signature or equivalent header before processing. Without this, anyone who discovers your endpoint can feed you arbitrary payloads.

The polling case

Use polling when:

• The data source doesn’t emit events. Legacy systems, databases, flat files, and many internal APIs don’t push. You have to pull. There’s no shame in polling a database on a schedule.
• Latency doesn’t matter. Nightly batch jobs — sentiment analysis on the day’s Telegram messages, generating tomorrow’s content queue, running your financial reconciliation — don’t need real-time triggers. A cron job at 2am is simpler and more reliable than a webhook receiver that has to be up 24/7.
• You want to control throughput. Polling lets you decide exactly how fast you process items. This is useful when your AI cost envelope is fixed — process 500 items per hour, not however many the webhook firehose sends.

A Telegram sentiment-monitoring project of ours polls Telegram channels on a schedule. The channels don’t emit webhooks, the analysis runs in batches, and the latency between a message being posted and the sentiment score being computed is acceptable for the use case (daily signals, not real-time trading).

The hybrid: webhook to queue, polling the queue

The pattern we recommend most for AI integrations is: webhook receiver → job queue → workers polling the queue.

The webhook receiver does nothing except validate the signature, persist the raw event to a queue, and return a 200. Workers poll the queue, pull items, run the AI processing, and write results. This gives you the low latency of webhooks and the controlled throughput and retry semantics of polling.

You don't always need the full version. In Everyring.ai, call events arrive as webhooks from the voice and telephony providers; the handler records the call, follow-ups run from scheduled jobs, and redelivered webhooks are safe because each downstream sync is claimed atomically in Postgres first.

Decision rule

Ask two questions:

• Does the data source emit events? If yes, start with webhooks.
• Does the user need the result in under 60 seconds? If yes, you need near-real-time processing — webhooks or very frequent polling.

If both answers are no, a scheduled polling job is simpler and you should use it. Save the webhook complexity for when the latency requirement actually demands it.