Plain definition: A rate limit is a cap that an API or service puts on how many requests you can make within a given time period. If you exceed it, requests are rejected or slowed down until the limit resets.

In plain terms

Think of a popular restaurant with a policy of seating no more than ten walk-in tables per hour to keep the kitchen from being overwhelmed. If you’re the eleventh group, you wait. Rate limits work the same way: the service provider decides how many requests it can handle from one customer in a given window, and anything beyond that gets turned away until the window resets — usually within a minute or an hour.

Why it matters for operators

When you build automations that call external APIs — AI tools, payment systems, email platforms — rate limits determine how fast your automation can run. If you’re processing a large batch of records, hitting a rate limit will pause or break the process. Understanding the limits of your tools helps you design automations that pace themselves and handle errors gracefully instead of failing silently.

Example

A marketing agency builds an automation to enrich 5,000 leads by calling an AI API for each one. The API allows 100 calls per minute. Without handling rate limits, the automation crashes at record 101. With a simple delay added, it paces itself and finishes all 5,000 records in under an hour without errors.