Changelog

AI Localization

Localize Courier templates in seconds with AI Translation, now available in Design Studio for email, SMS, push, in-app, and chat.

Embed Notification Preferences with One Web Component

Embed a complete notification preferences center in your app with Courier’s Web Component, giving users control over topics, channels, digests, and themes.

Introducing Routing: Reusable Strategies for Every Template

Courier now lets teams design routing strategies separately from templates, making it easier to manage delivery logic across channels and providers.

Email Fonts and Colors

Explore email-safe fonts and background color options in the new Courier Designer to create consistent, polished, and on-brand email experiences.

Custom Environments for Safer Messaging Workflows

Create isolated Courier environments for development, staging, QA, and production, each with its own data, integrations, API keys, logs, and templates.

Introducing Journeys

Courier Journeys is an AI-powered orchestration engine for building dynamic, event-driven messaging workflows across email, SMS, push, and in-app.

New Courier CLI

The new Courier CLI lets AI agents like Cursor and Claude Code send, debug, and manage notifications from the terminal or via MCP.

Introducing Design Studio

Design Studio is Courier’s drag-and-drop editor for building notifications across email, SMS, push, and Slack, with live previews and version history.

Improved AWS SES Delivery Tracking

Courier now surfaces detailed delivery events from AWS SES, giving clearer visibility to monitor performance and troubleshoot issues faster.

Navigation Bar Redesign

Courier's navigation is reorganized into Content, Orchestration, Directory, Analytics, and Integrations for faster access to key workflows.

Automation Lists API

Fetch all Lists programmatically with a new Courier API endpoint, making it easier to manage audiences at scale and sync data across systems.

New Courier Toasts SDK

Deliver real-time, customizable in-app notifications with Courier Toasts for Web and React. Fast setup, on-brand design, and seamless Inbox sync.

MessageMedia Webhooks for Delivery Updates

MessageMedia webhooks now deliver real-time, HMAC-verified SMS status updates (delivered, undeliverable) directly into Courier's message logs.

Courier's Model Context Protocol

Courier's beta MCP server lets AI tools and agents like Claude and Cursor access docs, code samples, and send messages through Courier's API.

Improved Template Analytics

Courier's redesigned Template Analytics page breaks down delivery, open, click, and error rates by channel and provider, helping you troubleshoot faster.

Improved API Settings

Courier’s new API Keys page features a cleaner UI and simple environment-specific selection, making key management faster and easier.

Courier Watermark Disabled for All

Courier has removed the 'Powered by Courier' watermark, giving all customers a fully branded messaging experience without paywalls or limitations.

New Courier Inbox Launch

Courier rebuilt Inbox: custom UI components, single-WebSocket sync, lazy-loaded messages, and a simpler React integration for in-app notifications.

Top and Sidebar Redesigns

Courier's dashboard has a redesigned sidebar and topbar, giving developers faster navigation and a cleaner, more organized workflow.

Courier Integration Page Redesign

Courier's redesigned Integrations page streamlines provider setup with clearer analytics and cross-channel observability for reliable messaging.

Courier Create Launch: Simplified Template & Brand Editing for Multi-Tenant Apps

Courier Create embeds template and brand editors in your React app, so multi-tenant SaaS teams can manage email design and branding per tenant.

Prevent JSON Rounding Errors: Safe Integer Limit Enforcement

Courier rejects numeric values over JavaScript's safe integer limit (9,007,199,254,740,991) to prevent silent JSON rounding errors and data corruption.

Twilio Content SID Support for WhatsApp Templates

Courier WhatsApp templates now support Twilio Content SIDs, so you can reference approved templates directly without duplicating content.

Courier Flutter 4.1.0 Release

New Courier Flutter SDK: iOS/Android thread & event updates, improved docs, and support for custom error messages in CourierInbox and CourierPreferences.

Courier-React-Native 5.5.2 Release

New Courier React Native SDK: enhanced threading stability for iOS & Android, plus updated docs for easier Expo support.

Preferences Channel Alias

Customize channel names in Courier’s Preferences Center: rename Email, SMS, or Push to match your brand voice, no code required.

Courier-Android 5.2.0 Release

New Courier Android SDK: rebuilt inbox, iOS-style event handling, onMessageEvent callback, better tests, and manual install due to Play Store issue.

Courier-iOS 5.7.3 Release

New Courier iOS SDK: improved socket handling, dedicated CourierActor thread, rebuilt inbox datastore, onMessageEvent callback, and expanded test coverage.

New Logs Histogram

Courier's new message logs histogram breaks down notification performance by day, with filterable date ranges for spotting delivery trends fast.

Assets Page Activity Columns

Courier's Assets page adds separate tabs for messages and automations, plus new columns showing notification performance over time.

AWS SES IAM Role Support

Courier supports AWS SES IAM role authentication, letting you send email with temporary, auto-rotated AWS credentials instead of static keys.

Inbox Sync Opt-Out

Courier now lets you un-sync email and in-app inbox events in a notification template, giving you more control over read status tracking across channels.

APNS Security Update

Apple's APNS security update takes effect March 29, 2025, but Courier customers need no changes. P8 keys and P12 certificates keep working as before.

Fixed website trailing slash

Changelog links on courier.com now resolve cleanly, with no extra trailing slash added on reload or when arriving from an external link.

New "Delivery Window" feature

Delivery Window lets you delay notifications until a set time range, using IANA timezones, so each user gets messages at the right local time.

Automations debugger, validation, and GET profile node

Courier's Automations Debugger adds diff panels, test events, and error highlighting, plus a new GET Profile node for fetching data dynamically.

Introducing Custom Message Tagging for Easy Filtering

Tag messages from Notification Templates to filter them in the Inbox or via the Messages API. Available behind a feature flag; contact support to enable.

Empty Tags Object in Webhook Payload

Courier fixed an issue where outbound webhook payloads showed empty tags objects. Payloads now correctly reflect metadata.tags from the send request.

POST /profiles/:user_id now allows empty profile creation

Courier's POST /profiles/:user_id endpoint now creates user profiles even with empty objects, aligning behavior with .identify() and other methods.

Allow Empty Profiles on POST /profiles/:user_id

Courier's POST /profiles/:user_id API endpoint now accepts empty profile objects, creating users consistently with .identify() and other profile methods.

Fixed webhook payload to accurately reflect metadata.tags for outbound messages

Courier fixed an issue where outbound webhooks showed empty tags objects. Payloads now accurately reflect metadata.tags from the send request.

Message tags as a template setting

Tag messages in Courier Notification Templates to filter them in Inbox or the Messages API. Available under a feature flag; contact support to enable.

404 Error on Ad-hoc Send Retry Resolved

Send Again now reliably re-sends ad-hoc messages with fan-out across lists, tenants, and audiences on retry.

Fixed 404 error for Send Again feature on undeliverable fan-out notifications

Send Again now works for undeliverable fan-out notifications across lists, tenants, and audiences, so re-sends reliably reach every recipient.

Delayed Messages Untracked in Logs UI & API

Delayed messages now appear in Courier's logs UI and API with full metadata, closing a gap where scheduled sends were invisible until delivery.

Mobile SDKs Now Supports Archive Functions

Courier's Android, iOS, and React Native SDKs now support archive APIs, so users can swipe to remove inbox messages and declutter notifications.

Digesting the Send API

Aggregate frequent transactional notifications into scheduled digests so users get one consolidated message instead of many, no code changes required.

Automation Switch Node Bug Fixes

Courier fixed various issues with the switch node, including improved support for accessing deeply nested data, ensuring more reliable automation logic.

Tenants User Interface Field Visibility

Edited JSON fields on the Tenants page now update on screen right away, matching the saved values already used in notifications.

SES ThrottleException Now Triggers Retryable Error

Courier now retries SES ThrottleException errors from sendRawEmail automatically, so throttled sends recover on their own instead of failing outright.

SES ThrottleException Handling Update Implemented

Courier now retries AWS SES ThrottleException with exponential backoff, so notifications keep sending automatically when SES rate limits are hit.

Invoke Step Automation Error Bug Fix

Invoke automation steps now handle null values in optional fields, so automations run reliably even when some data is missing.