Instantly

API

Warm up email accounts and run cold outreach campaigns through an API

Price: Paid plan required for API
Access: API v2 key

Docs
Warmup guide
OpenAPI
llms.txt

About

Connect sending accounts, enable automated warmup, monitor warmup analytics and run cold email campaigns. Warmup is included with Email Outreach plans; API access starts on a paid plan, not the free trial.

What you can do with it

Enable warmup for connected email accounts through the API
Check warmup activity and account health before outreach
Manage cold email campaigns across sending accounts

Get started

Subscribe to an Email Outreach plan and connect a sending account
Create an API v2 key with account update access
Enable warmup for the connected email address

Example

curl -X POST https://api.instantly.ai/api/v2/accounts/warmup/enable \
  -H "Authorization: Bearer $INSTANTLY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"emails":["sender@example.com"]}'

Details

Hosting: Hosted service
Available in: Worldwide
MCP server: Remote