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What is Courier?
Why teams use Courier and what the platform covers: routing, templates, inbox, preferences, and more.
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Follow the developer quickstart to make your first API call in a few minutes.
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Start with the agent quickstart for copy-paste patterns, guardrails, and API workflows.
Resources
- API Reference — REST API docs for sending, users, preferences, automations, and more.
- SDKs — server and client libraries for Node, Python, Go, Ruby, React, iOS, and Android.
- Help Center — contact support, check platform status, and view the changelog.