Loops API

loops.so

Provides a REST API to send transactional and marketing email and manage contacts, events, and lifecycle workflows for software companies.

The Loops API API has freemium pricing; offers a free tier (Free plan: up to 4,000 sends/month to 1,000 stored subscribed contacts, with Loops branding footer). Verified 2026-07-13 with per-field source links.

Communication Verified 2026-07-13 medium confidence

Base URL

https://app.loops.so/api/v1

loops.so ↗

Auth

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Free tier

Free plan: up to 4,000 sends/month to 1,000 stored subscribed contacts, with Loops branding footer

loops.so ↗

Pricing model

freemium

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Pricing

Pricing based on subscribed contacts synced to Loops; transactional sending included on paid plans; free plan available. Slider-based estimate, custom plans via email.

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Rate limits

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no source

OpenAPI spec

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MCP server

Loops MCP server for AI agents, coming soon

loops.so ↗