API Reference
RESTful APIs for sending email, managing contacts, and tracking analytics—designed for simplicity and scale.
Core API endpoints
Everything you need to send and monitor email programmatically.
Send Email
POST transactional and marketing messages with HTML and text bodies.
List Emails
Query sent messages with filters, pagination, and status.
Analytics
Aggregate opens, clicks, and bounces for campaigns and domains.
Official SDKs
Prefer a client library? We maintain SDKs for every major stack.
Node.js
npm install @reloop/sdk
Python
pip install reloop
Go
go get github.com/reloop/reloop-go
Start with the API
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Create an API key and explore interactive docs with copy-paste examples.