Send an event

Send an event

Sends a named event for a contact, found by email address or user ID, to start the workflows it triggers, and creates the contact if it doesn't exist.

Note: Create properties in Loops before you send them. Send an Idempotency-Key header: a key reused within 24 hours returns 409 Conflict.

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": { "loops": { "url": "https://mcp.loops.so" } } }

Call the MCP tool execute with POST /v1/events/send.

Server URL: https://mcp.loops.so

Note: Every operation runs through three tools: search finds it, describe shows its inputs, execute runs it.

CLI (official)

Install the command, then confirm it runs.

brew install loops-so/tap/loops
loops --version

Run loops events send.

Set $LOOPS_API_KEY in your environment first (get a key: https://app.loops.so/settings?page=api).

API (official)

• Base URL: https://app.loops.so/api
• Endpoint: POST /v1/events/send
• Auth: send the header Authorization: Bearer $LOOPS_API_KEY
• Get a key: https://app.loops.so/settings?page=api
• Docs: https://loops.so/docs/api-reference/intro

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.