Schedule Mastodon Posts with Codex
Create and schedule Mastodon posts from Codex. Connect Genfeed over MCP, approve OAuth, and publish after review.
How to post to Mastodon from Codex
Run codex mcp login genfeed if authorization did not open during setup. Sign in and approve access in your browser, then return to Codex. Then connect your Mastodon account in Genfeed once.
Connect URL
https://mcp.genfeed.ai/mcpInstall command
codex mcp add genfeed --url https://mcp.genfeed.ai/mcpConfiguration
[mcp_servers.genfeed]
url = "https://mcp.genfeed.ai/mcp"Verify
codex mcp listWhat can you ask Codex to do on Mastodon?
Ask in plain language. Genfeed holds posts for review before anything goes to Mastodon.
“Draft a Mastodon post for our release notes, under 500 characters.”
“Add alt text to every image before scheduling.”
“Schedule the approved post for tomorrow morning.”
Mastodon content Genfeed creates
Everything Codex can make for Mastodon through Genfeed.
AI-generated toots optimized for Mastodon character limits and formatting
Thread creation with automatic chaining for long-form Mastodon content
Instance-aware posting with support for any Mastodon-compatible server
Media attachment generation with AI images and alt-text descriptions
Hashtag strategy for Fediverse discovery and cross-instance reach
Schedule Mastodon posts from other AI agents
Codex and Mastodon: frequently asked questions
Can Codex post to Mastodon?
Yes. Once your Mastodon account is connected in Genfeed, Codex can draft, schedule, and publish Mastodon posts through the Genfeed MCP server.
Do I need a Mastodon API key?
No. You connect Mastodon in Genfeed once by signing in. Codex reaches Genfeed over MCP with browser OAuth and never sees your Mastodon credentials.
Does Codex publish to Mastodon without my approval?
No. Genfeed holds posts for review, and you approve before anything goes to Mastodon, unless you set up a workflow that publishes directly.
How do I connect Codex to Genfeed?
Run codex mcp login genfeed if authorization did not open during setup. Sign in and approve access in your browser, then return to Codex.
What URL do I connect?
Every client uses the same hosted MCP endpoint: https://mcp.genfeed.ai/mcp.
Post to Mastodon from Codex.
Start on managed cloud, connect Mastodon, then connect Codex with the steps above.