Lineation vs The Posting Substack API

Lineation is the accountability layer for AI agents, zero-trust agent identity, LLM gateway, and MCP gateway with cross-provider policy, runtime defense, and forensic...

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

About Lineation

Lineation is the accountability layer for AI agents, zero-trust agent identity, LLM gateway, and MCP gateway with cross-provider policy, runtime defense, and forensic lineage. Start free in the cloud or book an on-prem demo. Lineation gives security and platform teams one line of defense, zero-trust agent identity, an LLM gateway and MCP gateway across every model and tool, policy that travels with the workflow, and an incident story your auditors can follow. Listing here reflects integration compatibility and does not imply endorsement, partnership, or certification by any of the companies shown.

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).