September 2026
Connect AI assistants with MCP
- Added: Connect Claude, Claude Code or another MCP client to LithoBlocks to discover templates, author and validate messages, and send them to Slack. See MCP setup.
- Added: Authorize an assistant through browser sign-in or an API key, with actions limited by your permissions and the ability to revoke connected apps.
Presence-aware schedules and reliable carousel actions
September 9, 2026- Added: Schedule messages when a Slack user becomes active, including an optional delay after activity.
- Improved: Carousel buttons retain the selected item through bound modals, submissions, and card replacements.
- Improved: Choose API-key permissions using resource groups and editable presets.
- Fixed: Oversized interaction metadata is rejected before sending a message or spending credits.
- Fixed: More reliable dependency health checks and dedicated authentication for billing usage ingestion.
- Changed: Validation returns free diagnostics without rendered output; use compile for a rendered preview.
June 2026
Expanded API template processing
- Improved: Support for additional Slack block types, with automatic text-limit handling and message formatting.
April 2026
More flexible templates with nested logic
- Improved: Combine conditional sections and repeating content inside the same template to handle more complex data. See template directives.
March 2026
Expanded block authoring
- Added: Create and preview messages using additional Slack block types.
November 2025
Interactive webhooks and Slack sender identity
- Added: Button-triggered webhook dispatch and controls for retry and idempotency settings.
- Added: Support for a custom Slack sender name and icon when sending messages.
Send direct messages by email or Slack ID
- Added: Address a direct message using either a teammate’s email address or their Slack user ID when sending a template from the dashboard.
Trace webhook activity
- Added: Review webhook activity in a dedicated log view, with destination names, response statuses and error details to help diagnose failed requests. See logs.
Preview and test webhook payloads
- Added: Preview webhook payloads with sample data and send a test request from the editor. Inspect the response status, body and timing before using the webhook in a workflow.
- Improved: Spot invalid placeholders while editing a payload. See button webhooks.
July 2025
AI assistance, tables and community templates
- Added: AI-assisted template creation with a conversational prompt workflow.
- Improved: Table editing with array-data previews and column visibility controls.
- Added: Community template browsing and publishing workflows.
Review AI changes and revisit conversations
- Improved: Compare your current template with an AI-generated revision side by side before applying changes.
- Added: Return to saved AI conversations when continuing work on a template. See the AI template assistant.
Manage organization membership
- Added: Remove team members from an organization through its member settings, with safeguards against removing the owner or yourself.
June 2025
Usage visibility and template management
- Added: A usage page with credit logs, filters and summaries to help understand message activity.
- Added: Template duplication and a version-history view for managing reusable messages.
Inspect individual message activity
- Added: Open individual credit-log entries from the usage table to investigate an API request and its outcome. See logs.
Personalize and preview your Slack sender
- Added: Edit a template’s sender name and emoji without creating a new template version.
- Improved: See the sender name and emoji in the Slack preview while designing your message.
May 2025
Stronger API key protection
- Security: API key creation and rotation use server-side hashing, with validation against the stored hash.
April 2025
Visual template builder
- Added: A visual builder for Slack messages, with editable text, images, buttons and a message preview.
- Added: Save and version templates to reuse messages across your workflows.
Build messages that adapt to your data
- Added: Use conditional content and repeating lists to turn a single template into messages tailored to each request. See template directives.
- Improved: Insert variables directly in the text editor and use placeholders in section accessories. See placeholders.
Undo edits and copy API requests
- Added: Undo and redo template edits as you build a message.
- Added: Inspect and copy an API request containing your template ID and placeholder fields from the preview panel.
Reusable data models and organization onboarding
- Added: Define reusable entities and fields, attach sample data, and select an entity when creating a template. See entities.
- Added: Create or join an organization during account onboarding to work with a team.