apollo-rate-limits

# 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) Organization Search | 100 | 10 | /mixed_companies/search Organization Enrichment | 100 | 10 | /organizations/enrich Contacts CRUD | 100 | 10 | /contacts/* Sequences | 100 | 10 | /emailer_campaigns/* Deals | 100 | 10 | /opportunities/* ``` Response headers on every successful call: - `x-rate-limit-limit` — max requests per window - `x-rate-limit-remaining` — requests remaining in current window - `retry-after` — seconds to wait (only on 429 responses) ### Step 2: Build a Per-Endpoint Rate Limiter...