How much does Loops cost?

Pricing is based on subscribed contacts. Transactional email is included at no additional charge.

What does the free plan include?

Up to 4,000 sends/month to 1,000 contacts. Any paid plan removes these limitations.

How are you different from other email platforms?

Loops is purpose-built for SaaS. It unifies marketing, product, and transactional email in one platform with event-driven automations, a modern API, and agent-ready tooling.

Developer guides

Send email from AI agents

Let Claude Code, Cursor, Codex, or any coding agent set up and send your product email through Loops. The surfaces agents need are published, documented, and tested weekly.

Who this is for

You’re building with a coding agent and want it to handle email: install the SDK, sync contacts, send transactional messages, draft campaigns. Most email platforms make agents guess. Loops publishes the surfaces agents actually read, so the setup works on the first try.

What Loops exposes to agents

Agent skills teach Claude Code, Cursor, and Codex the Loops API, CLI, and email best practices with a one-command install.
The Loops CLI gives agents terminal-first contact, event, and transactional operations, which also makes great smoke tests.
llms.txt is the docs index AI systems ingest.
The OpenAPI spec describes the full API in machine-readable form.
LMX is a markup format that lets agents create and edit email content programmatically.
The agents hub collects the quickstart and everything above in one place.

Give your agent this prompt

What the agent will produce

import { LoopsClient } from "loops";
const loops = new LoopsClient(process.env.LOOPS_API_KEY!);

// keep the contact in sync
await loops.updateContact({ email, properties: { plan: "trial" } });

// trigger workflows from product events
await loops.sendEvent({ email, eventName: "onboarding_completed" });

// send operational email
await loops.sendTransactionalEmail({ transactionalId, email, dataVariables });

We test this weekly: an unaided agent goes from a blank Next.js app to a correct, typechecked Loops integration in under five minutes using only public docs.

Safety rules agents follow with Loops

Server side only. The API key lives in LOOPS_API_KEY and never reaches client code.
Transactional email is for user-triggered operational messages. Marketing and lifecycle email run through campaigns and workflows, which respect unsubscribes.
Dashboard steps stay human: creating the API key, publishing transactional templates, and verifying the sending domain.