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Use the Instantly developer documentation to build integrations, automate workflows, and manage your workspace programmatically.

Quickstart

Create an API key and make your first API request.

Browse the API reference

Explore API setup, guides, endpoints, and schemas.

Connect accounts with OAuth

Connect Google and Microsoft email accounts to a workspace.

Receive webhook events

Respond to campaign, email, lead, and meeting events.

Connect with MCP

Let AI assistants manage your workspace through natural language.

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What you can build

Use API v2 to:
  • Manage email accounts, campaigns, leads, and lists.
  • Connect Google and Microsoft email accounts through OAuth.
  • Receive real-time activity through webhooks.
  • Manage sub workspaces from an admin workspace.

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Before you start

You need access to an Instantly workspace and an API v2 key. When you create a key, select only the scopes your integration requires. Follow the quickstart to send your first request.

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Base URL

Send API v2 requests to:
Authenticate each request with your API key as a bearer token. See Authorization for details.
Keep your API key secure. Never expose it in client-side code or commit it to source control.