The Posting Substack API vs VibeDrift

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

Your AI agent gets worse as your project grows. VibeDrift catches the drift, fixes it, and gives your agent the context to stop making it.

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).

About VibeDrift

Your AI agent gets worse as your project grows. VibeDrift catches the drift, fixes it, and gives your agent the context to stop making it. See exactly how it works, free to use and fully public. Mid-task, Claude Code and Cursor ask your codebase what it already does, and get an evidence-backed answer in under a second. With and without VibeDrift, graded by an independent pass, it only changes things when the model would've gotten it wrong, and we show where it did nothing.