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Postbase lets you write once and publish everywhere — X, LinkedIn, Instagram, TikTok, YouTube, Bluesky, and Mastodon — from a single composer, calendar, and media library. It’s open source (AGPL), self-hostable, and MCP-native, so an AI agent can draft and schedule posts for you over the Model Context Protocol.

Using Postbase

Connect channels, write posts and threads, schedule them on the calendar, and reuse media across posts.

MCP & agents

Connect Postbase to Claude, Cursor, and other tools so an agent can schedule and publish for you — with or without an API key.

Public API

A small REST API to list channels and create or cancel scheduled posts from your own tools.

Self-hosting

Run your own Postbase on Next.js + Supabase. Bring your own platform apps and storage.

How it’s organised

The docs are split by what you’re trying to do — use the product, wire up an agent, call the API, or run your own instance.

Why Postbase

Open source

AGPL-licensed and self-hostable. Own your data and your workflow.

MCP-native

Built for AI agents from day one — schedule posts in plain language.

Every channel

One composer for X, LinkedIn, Instagram, TikTok, YouTube, Bluesky and Mastodon.