Create a broadcast

Create a broadcast

Creates a marketing email to every subscribed contact in one segment, saved as a draft or, with send set to true, sent or scheduled at once.

Note: Over MCP it only saves the draft: send it with send-broadcast. A draft made without send goes out later with POST /broadcasts/{broadcast_id}/send or resend broadcasts send <id>.

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 create-broadcast.

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 broadcasts create.

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 /broadcasts
• 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 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.