LithoBlocks

LithoBlocks

Slack Block message templates without the JSON

eric1666
@eric1666
Published on Jun 13, 2026
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WebAPI

About LithoBlocks

Stop hand-coding Slack messages. LithoBlocks provides visual templates that are versioned and team-owned, allowing you to manage your messaging without the technical overhead of manual JSON construction. You can send these templates to your workspace with a single REST API call, streamlining your communication workflow. The platform offers a 14-day free trial on any plan to help you get started. - Visual Block Kit builder - Simple REST API - Directives to Handles Complex Arrays of Block Kit Structure - Modals, integrated - Message updates Don't settle for plain-text Slack Alerts and don't waste engineering hours maintaining complex Block Kit structure and slack app or Interactivity infrastructure.

Product Insights

LithoBlocks is a web-based developer tool that replaces manual Slack JSON coding with a visual template builder and version control. It enables teams to send complex Block Kit messages and modals through a single REST API call using any subscription-based plan.

  • Replaces manual JSON construction with a visual template builder for Slack Block Kit.
  • Simplifies integration through a unified REST API for sending templates and message updates.
  • Supports team ownership and versioning of message templates for better collaboration.
  • Integrated modal support and directives for managing complex block arrays.

Ideal for: Developers and startups needing to automate Slack communications via API without dedicated infrastructure for maintaining complex Block Kit structures.

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