HeimWall vs The Posting Substack API

Signal, not surveillance. See how your engineers use Cursor, Claude Code, and Copilot: catch leaked secrets, PII, and confidential data, without blocking them or reading...

The posting API for Substack authors. Draft, publish, and schedule posts via Python SDK, CLI, or MCP, without the browser editor.

About HeimWall

Signal, not surveillance. See how your engineers use Cursor, Claude Code, and Copilot: catch leaked secrets, PII, and confidential data, without blocking them or reading their prompts. Nothing sits in your send path, your prompt reaches the tool untouched, and what you type into an AI tool is never sent to us. To read your prompt before it is sent, the app reads the composer through the macOS Accessibility API and watches the clipboard. Accessibility is a wide permission and macOS does not offer a narrower one for this.

About The Posting Substack API

The posting API for Substack authors. Draft, publish, and schedule posts via Python SDK, CLI, or MCP, without the browser editor. All agents supported Works with Claude, Codex, Cursor, and OpenCode . If you write and publish a newsletter, this is for you. Connect your publication, authenticate with your session, and post without living in the browser editor. Optional link attachment is created first, then the note is posted.\n\nPython: create_note()\nCLI: create-note\nMCP: create_note\nRate limit: 1 request per second\n\n# Create note, Request\nPublish a Substack Note (feed comment).