Instantly Cold Email (API v2)

Create and manage Instantly.ai cold outreach campaigns: sequences, leads, sending accounts.

Many "intuitive" details are wrong. Every gotcha in Common pitfalls is something this skill author hit on a live campaign. Read that section first when something doesn't work.

API basics

• Base URL: https://api.instantly.ai/api/v2
• Auth: Authorization: Bearer $INSTANTLY_API_KEY
• Key location: env var INSTANTLY_API_KEY (Instantly → Settings → Integrations → API; never hardcode)
• Rate limit: 10 req/sec total. For bulk ops (>1000 leads) throttle to ~5 RPS.
• Pagination: cursor starting_after + next_starting_after in response.

INST_KEY=$INSTANTLY_API_KEY

Campaign creation workflow