Documentation

Learn how to send with Reloop

Guides, API reference, SDKs, and agent tooling — everything you need to send, receive, and automate email.

AI Agents

Get started with your AI agent

Copy this prompt into Cursor, Claude, or any agent to install Reloop, verify a domain, and send a test email.

Fetch https://reloop.sh/docs and help me send my first email with the Reloop API. Create an API key, verify a domain, and send a test message.

Pick a path and ship your first message in minutes.

Send email

POST /mail and deliver your first message.

Verify a domain

SPF, DKIM, and DMARC setup for deliverability.

API keys

Create, rotate, and scope credentials.

Install an SDK

Node, Python, Go, Rust, PHP, and more.

Deep dives into Reloop’s core features.

Emails

Transactional sending, SMTP, and delivery.

Templates

Design, version, and send dynamic HTML.

Contacts

Audiences, groups, channels, and properties.

Agent Inbox

Receive and reply to inbound mail.

Workflows

Automate multi-step email sequences.

Full reference for every resource.

Sending

Audience

Observability

Examples

Resources

Self-host Reloop

Run the full stack on Vercel, Railway, Docker, or your own VPS.