SDKs

Official, fully-typed clients for the MailStack API. Each SDK covers transactional sends (single, batch, and bulk), pre-send lint, scheduling, messages and delivery events, domains, templates, API keys, and signed webhooks — with a webhook signature-verification helper built in. Prefer raw HTTP? See the REST API reference.

Node.js

npm

TypeScript-first SDK for Node 18+ (ESM + CJS).

npm install mailstack

.NET

NuGet

Idiomatic async SDK for .NET with DI support.

dotnet add package MailStack

Go

Go modules

Context-aware, zero-dependency SDK for Go 1.22+.

go get github.com/VooStack/mailstack-go

Flutter / Dart

pub.dev

Pure Dart SDK for Flutter apps and Dart backends.

dart pub add mailstack