Send an event

Send an event

Sends a named event for one contact, by contact ID or email address, and starts every automation that event triggers.

Pass exactly one of contact_id or email; an email address with no contact yet becomes one when the automation runs. The optional payload feeds the automation's template variables and conditions, and is checked against the event's schema when it has one.

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": { "resend": { "url": "https://mcp.resend.com/mcp" } } }

Call the MCP tool send-event.

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

CLI (official)

Install the command, then confirm it runs.

npm install -g resend-cli
resend --version

Run resend events send.

Set $RESEND_API_KEY in your environment first (get a key: https://resend.com/api-keys).

API (official)

• Base URL: https://api.resend.com
• Endpoint: POST /events/send
• Auth: send the header Authorization: Bearer $RESEND_API_KEY
• Get a key: https://resend.com/api-keys
• Docs: https://resend.com/docs/api-reference/introduction

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.