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):

Endpoint Category           | Limit/min | Burst/sec | Notes
----------------------------+-----------+-----------+-------------------------------
People Search               | 100       | 10        | /mixed_people/api_search (free)
People Enrichment           | 100       | 10        | /people/match (1 credit each)
Bulk People Enrichment      | 10        | 2         | /people/bulk_match (up to 10/call)