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Powerful APIs built for developers who demand more

Instiller’s APIs are built for performance, scalability and ease of integration and give you full control over every feature within your white label email marketing solution.

Free 14 day trial

Connect. Automate. Deliver.

Instiller offers a robust suite of APIs designed for developers who want more than just basic functionality. Whether you’re provisioning accounts or logins, sending password resets, onboarding messages or large-scale marketing campaigns our APIs give you the tools to do it quickly, reliably and with full visibility.

Why developers trust Instiller’s email APIs

Comprehensive API coverage

See how many emails are in your queues and the responses being sent back by ISPs.

Admin level API

All links within emails and landing page URLs are served securely using HTTPS.

Marketing campaign API

Domain level tracking of all related campaigns and automation workflows.

Templates API

See how many emails are in your queues and the responses being sent back by ISPs.

Webhooks & event tracking

Monitor every bounce, open, click, and unsubscribe in real time. Instiller’s event webhook system connects your app directly to email activity so you can trigger workflows and gain insight instantly.

Developer-first, Always

Clean, predictable structure

Instiller’s API follows REST principles and uses consistent JSON payloads. You’ll spend less time debugging and more time building.

Extensive documentation

From quick start guides to comprehensive endpoint references, our documentation is built with developers in mind.

Sandbox mode

With unlimited accounts Instiller makes it easy for you to ensure your integration works exactly as expected before going live.

Developer tools

Complete visibility on all requests and responses to help simplify the process of building and testing integrations.

Start sending with confidence

With Instiller, you’re not just getting another email API, you’re unlocking a full-featured platform that gives developers everything they need to build, scale, and optimise email into any application.