Apollo Rate Limits

Overview

Implement robust rate limiting and backoff for the Apollo.io API. Apollo uses fixed-window rate limiting with per-endpoint limits. Unlike hourly quotas, Apollo limits are per minute with a burst limit per second. Exceeding them returns HTTP 429.

Prerequisites

• Valid Apollo API key
• Node.js 18+

Instructions

Step 1: Understand Apollo's Rate Limit Structure

Apollo's official rate limits (as of 2025):