---
title: "Webhooks vs API: What's the Difference? | WebhookRelay"
meta:
  "og:description": "Webhooks and APIs both move data between systems, but one pulls and the other pushes. A clear explanation of webhooks vs APIs, when to use each, and how they work together."
  "og:title": "Webhooks vs API: What's the Difference?"
  description: "Webhooks and APIs both move data between systems, but one pulls and the other pushes. A clear explanation of webhooks vs APIs, when to use each, and how they work together."
---

![Stripes](https://webhookrelay.com/blog/webhooks-vs-api/images/stripes.svg)

# **Webhooks vs API: What's the Difference?**

Webhooks and APIs both move data between systems, but one pulls and the other pushes. A clear explanation of webhooks vs APIs, when to use each, and how they work together.

If you're integrating two systems, you'll hit this question fast: should you call an **API**, or receive a **webhook**? They both move data over HTTP, but they work in opposite directions — and picking the right one saves you a lot of wasted requests.

## [The one-line answer](#the-one-line-answer)

- **API:** _you pull._ Your app asks the other system for data when it needs it.
- **Webhook:** _they push._ The other system sends you data automatically when something happens.

## [How an API works (pull)](#how-an-api-works-pull)

With a typical web API, your application is the one making requests. You want to know if an order shipped, so you call the provider's endpoint and get the current state back:

```
GET /v1/orders/ord_123
# -> { "status": "shipped" }
```

If you want to stay up to date, you have to keep asking — **polling** every minute or so. Most of those requests return "nothing changed," which wastes time and rate limits.

## [How a webhook works (push)](#how-a-webhook-works-push)

A webhook flips the direction. You give the provider a URL, and **they** send you an HTTP POST the moment an event occurs:

```
POST /your-webhook-endpoint
Content-Type: application/json

{ "event": "order.shipped", "id": "ord_123" }
```

No polling, no wasted calls — you find out as it happens. That's why webhooks are sometimes called "reverse APIs" or "push APIs." (New to them? See [what is a webhook](https://webhookrelay.com/blog/webhooks-vs-api/blog/what-is-webhook/).)

## [Webhooks vs API at a glance](#webhooks-vs-api-at-a-glance)

|  | API (pull) | Webhook (push) |
| --- | --- | --- |
| Who initiates | Your app | The provider |
| Timing | On demand / polled | Real time, event-driven |
| Efficiency | Wasteful if polling | Only fires on events |
| Needs a public URL | No | Yes (a URL providers can reach) |
| Best for | Fetching current state | Reacting to events |
| Failure handling | Retry your own call | Provider retries delivery |

## [When to use which](#when-to-use-which)

**Reach for a webhook when:**

- You need to react to events in near real time (payments, deploys, new messages).
- You'd otherwise be polling an API constantly.

**Reach for an API (or polling) when:**

- The provider doesn't offer webhooks.
- You need a full, current snapshot on demand.
- You only need the data occasionally.

## [They're better together](#theyre-better-together)

The most robust integrations use **both**. A common, reliable pattern is the _thin event_: the webhook tells you _that_ something happened, and you call the API to fetch the authoritative details.

```
order.shipped webhook arrives  ->  GET /orders/ord_123 to fetch full, current data
```

This avoids trusting a payload that might be stale or out of order, and keeps your webhook handler simple.

## [The catch with webhooks: you need a reachable URL](#the-catch-with-webhooks-you-need-a-reachable-url)

The one thing a webhook needs that an API call doesn't is a **public URL the provider can POST to** — which is awkward when your code runs on `localhost` or behind a firewall. That's exactly what Webhook Relay solves: [inspect the payload](https://webhookrelay.com/blog/webhooks-vs-api/webhook-bin/) in your browser, then [forward it to localhost or a private server](https://webhookrelay.com/blog/webhooks-vs-api/webhooks/) with no public IP.

[Test a webhook now](https://webhookrelay.com/blog/webhooks-vs-api/webhook-bin/) or [start forwarding for free](https://my.webhookrelay.com/register).