Send a campaign

Send a campaign

Starts an asynchronous job that sends a campaign to its configured audience.

Check progress with Get Campaign Send Job (get_campaign_send_job), and stop a send with Cancel Campaign Send (cancel_campaign_send). Confirm the campaign, its audience and its content with the user before sending.

Set up

Use the first option your agent supports.

MCP (official, remote)

Add this server to your agent's MCP settings, then sign in when asked.

{ "mcpServers": { "klaviyo": { "url": "https://mcp.klaviyo.com/mcp" } } }

Call the MCP tool send_campaign.

Server URL: https://mcp.klaviyo.com/mcp

CLI (official)

Install the command, then confirm it runs.

go install github.com/klaviyo/klaviyo-cli/cmd/klaviyo@latest
klaviyo --version

Run klaviyo campaigns send-campaign.

Set $KLAVIYO_API_KEY in your environment first (get a key: https://www.klaviyo.com/create-private-api-key).

API (official)

• Base URL: https://a.klaviyo.com
• Endpoint: POST /api/campaign-send-jobs
• Auth: send the header Authorization: Klaviyo-API-Key $KLAVIYO_API_KEY
• Get a key: https://www.klaviyo.com/create-private-api-key
• Docs: https://developers.klaviyo.com/en/reference/api_overview

Before doing anything else, make one read-only call to confirm access.

Rules

• Ask the user before anything that sends messages, costs money, or changes data.
• Never print API keys.