OctoLoops vs The Posting Substack API

Always-on agents that watch for the moment a company becomes worth contacting, find the right person there, and draft the message. Free plan from your URL, no account needed.

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

About OctoLoops

Always-on agents that watch for the moment a company becomes worth contacting, find the right person there, and draft the message. Free plan from your URL, no account needed. 01 Fill in your product's URL 02 Get your plan and first opportunities 03 Review, send, and keep them coming. A company that did something this week which makes your product relevant right now: raised a round to enter a new segment, opened a market, took on a reporting obligation it has no tooling for.

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).