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Add leads to a campaign

Adds up to 1,000 leads to one Instantly campaign or lead list, checking their emails against blocklists and existing leads.

Updated Oct 11, 2026

add-leads-to-campaign.md

Add leads to a campaign

Adds up to 1,000 leads to one Instantly campaign or lead list, checking their emails against blocklists and existing leads.

Note: Leads added to an active campaign can start receiving its emails: confirm the campaign first. Pass campaign_id or list_id, not both; the key needs the leads:create scope.

Set up

Use the first option your agent supports.

API (official)

Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.

Rules

  • Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
  • Never print API keys.

Ways in

RouteSourceCallRequiredDocs
APIOfficialPOST /api/v2/leads/addAPI key in $INSTANTLY_API_KEYDocs

Workflows using Add leads to a campaign