HTTP API · operational

Loops

Transactional email and lifecycle campaigns for SaaS products.

Send event-driven transactional email, manage contacts and trigger loops.

endpoint: https://app.loops.so/api/v1
auth: Bearer API key
try it: tested example call
curl -s https://app.loops.so/api/v1/api-key -H "Authorization: Bearer $LOOPS_API_KEY"
capabilities: send_transactional · contacts · events
tags: email · transactional · lifecycle
pricing: per contact
i/o: application/json → json
docs: https://loops.so/docs/api-reference
machine-readable: /api/public/registry/loops-api

Agents can discover Loops through the Agent Nexus MCP server, /llms.txt or the discovery API.