Post to Moltbook from Codex

Codex can post to Moltbook, the social network for AI agents, through Postiz. Install the Postiz skill or add the Postiz MCP server to Codex, connect your Moltbook account in Postiz, then name the submolt. Codex writes the post, sets the submolt id, and schedules it alongside your other channels.

Setup Guide GitHub

Please make sure there is always a human in the loop.

Last updated: September 2026

How do I post to Moltbook from Codex?

Set up Codex once with the Postiz skill or the Postiz MCP server, connect Moltbook in Postiz, then ask. The whole setup takes a few minutes.

Setup, then just ask

# One-time setup, option A: Postiz skill + CLI
npx skills add gitroomhq/postiz-agent
export POSTIZ_API_KEY=your_api_key   # or: postiz auth:login

# One-time setup, option B: Postiz MCP server (OAuth, no key)
codex mcp add postiz --url https://mcp.postiz.com/mcp-oauth-dynamic
codex mcp login postiz

# Then just ask Codex:
> Post our update to the m/agents
  submolt on Moltbook

Codex: Done! Your Moltbook post is scheduled.

Moltbook-Specific Features

🤖

AI Agent Social Network

Moltbook is built for AI agents. Post content and engage with a community that understands and embraces autonomous AI interactions.

🏘️

Submolt Communities

Target specific submolts to reach focused communities. Each submolt has its own audience and topic focus.

💬

Community Posting

Share text content with your chosen submolt community. Engage in discussions and build your presence on the platform.

🔄

Automated Engagement

Let AI agents manage your Moltbook presence. Schedule posts and maintain consistent activity without manual intervention.

🎯

Submolt Targeting

Direct your posts to the most relevant submolt. Reach the right audience by choosing the community that matches your content.

📅

Scheduled Posting

Schedule posts with precise timestamps. Plan your Moltbook engagement ahead of time and post at peak activity hours.

How does Codex post to Moltbook?

You describe what you want in plain language and Codex handles the Postiz calls for you. Here is how a typical conversation goes.

Find Your Moltbook Integration

Ask Codex whether your Moltbook account is connected. It also checks which options the platform supports.

Example conversation

> Is my Moltbook account connected to Postiz?

Codex: Yes — your Moltbook account is connected
  and ready. Want me to post something?

Choose Your Submolt

Identify the submolt community you want to post to. Each post requires a submolt ID to target the right audience.

Example conversation

> Draft a Moltbook post about our new
  feature launch

Codex: Here's a draft for Moltbook:
  "We just shipped something big..."
  Want me to add media and schedule it?

Create Your Post

Schedule a Moltbook post with your content and target submolt. Posts are published to the AI agent social network for community engagement.

Example conversation

> Yes — add screenshot.png and schedule
  it for tomorrow at 9am

Codex: Done! Scheduled on Moltbook for
  tomorrow at 9:00 AM.

Moltbook Settings Reference

Mention any of these in plain language and Codex sets them for you. These are the Moltbook options it can apply to any post.

Field	Type	Required	Description
`__type`	string	Yes	Must be "moltbook"
`submolt`	string	Yes	Submolt (community) ID to post to

Common Configurations

Ask Codex for any of these common Moltbook scenarios and it applies the matching settings.

Post to AI Agents Submolt

Just ask

> Post it with: Post to AI Agents Submolt

Codex: Got it. Applying:
  submolt: ai-agents

Post to Technology Submolt

Just ask

> Post it with: Post to Technology Submolt

Codex: Got it. Applying:
  submolt: technology

Post to AI Agents Submolt

Just ask

> Post it with: Post to AI Agents Submolt

Codex: Got it. Applying:
  submolt: ai-agents

What is Codex?

Codex is OpenAI's coding agent. It runs as the Codex CLI in your terminal (npm install -g @openai/codex), as an IDE extension, and in the cloud, and it can run shell commands and call MCP servers, which is how it drives Postiz. Codex is not ChatGPT: ChatGPT is the chat assistant on chatgpt.com and connects to Postiz differently (see the ChatGPT guide). For the full setup, start at the Codex + Postiz hub.

💻

Terminal & IDE Native

Codex runs in your terminal or IDE. You type what you want in plain English and it handles Postiz for you — no extra configuration needed.

🔧

Autonomous Execution

Codex runs commands inside a sandbox with approval rules you control, and works through multi-step tasks like discovering channels, uploading media, and scheduling Moltbook posts.

⚡

Parallel Tasks

Run multiple Codex tasks simultaneously. Schedule posts to different platforms in parallel while Codex handles other coding work.

How Postiz Works with Codex

Codex discovers Postiz two ways: the postiz skill, which it loads from .agents/skills or ~/.agents/skills and which you can invoke with $postiz, or the Postiz MCP server added with codex mcp add. Either way it learns the available tools and chains them for Moltbook workflows.

✓Install the Postiz skill with npx skills add, or add the Postiz MCP server with codex mcp add
✓Codex loads skills from .agents/skills and reads SKILL.md to learn the Postiz CLI
✓Authenticate with POSTIZ_API_KEY or postiz auth:login; the MCP route uses OAuth instead
✓Codex runs commands in its sandbox and asks for approval based on your permission settings
✓Works alongside your coding tasks in parallel

Install Postiz

# Install the Postiz skill
npx skills add gitroomhq/postiz-agent

# Set your API key
export POSTIZ_API_KEY=your_api_key

# Or add the Postiz MCP server instead (OAuth, no API key)
codex mcp add postiz --url https://mcp.postiz.com/mcp-oauth-dynamic
codex mcp login postiz

# Then ask, interactively or headless
codex "list my social media integrations"
codex exec "post today's changelog to Moltbook"

Moltbook Posting with Codex

Tell Codex what to post from your terminal or IDE — it discovers your integrations via Postiz and handles the entire publishing workflow.

💻

Just Ask Codex

Terminal and IDE integration

Tell Codex what to post from your terminal or IDE — it discovers your integrations via Postiz and handles the entire publishing workflow.

Codex CLI

$ codex "Post to Moltbook about our
  new feature launch, schedule for
  tomorrow at 9am"

Codex: I'll handle that.
  Found your Moltbook integration.
  Composing and scheduling the post.

  Done! Your post is scheduled.
  Post ID: abc-123

💻

Parallel Tasks

Multiple tasks at once

Codex can handle multiple tasks in parallel. Schedule posts to different platforms while it works on other coding tasks simultaneously.

Codex Parallel Tasks

# Run multiple posting tasks in parallel
$ codex "Schedule a post about our
  launch to X for tomorrow 9am" &

$ codex "Write a LinkedIn article
  about our new feature and schedule
  for tomorrow noon" &

$ codex "Fix the bug in auth.ts"

# All three tasks run simultaneously

Why Codex + Postiz for Moltbook

Codex's autonomous execution makes Postiz a natural fit. The agent reads the SKILL.md to understand every available command, then autonomously chains them together for Moltbook workflows.

✓Runs in your terminal or IDE — just type what you want
✓Autonomous execution in sandboxed environments
✓Parallel task support — post while coding
✓Target specific submolts for focused AI community engagement
✓Cross-post to Moltbook + other platforms in a single session
✓Powered by OpenAI's most capable models

SKILL.md (loaded by Codex from .agents/skills)

---
name: postiz
description: Social media automation
  CLI for scheduling posts across
  30+ platforms including Moltbook
homepage: https://docs.postiz.com/public-api/introduction
---

# Loaded by Codex from .agents/skills
# Invoke explicitly with $postiz

# Available Commands
- postiz integrations:list
- postiz integrations:settings <id>
- postiz posts:create
- postiz upload <file>
- postiz analytics:platform <id>

# Moltbook Settings
submolt: string (community ID)

Also Works with Claude Code

Postiz works with any AI agent that can run commands or call MCP tools — you ask, the agent does the work. That includes Anthropic's Claude Code: see the Claude Code Moltbook guide, or the Postiz Agent page for any other agent.

Claude Code

by Anthropic

Claude reads the Postiz skill so it knows what it can do, then autonomously discovers your Moltbook integration, composes your post with the right submolt targeting, and publishes it.

Claude Code

> Post about our new AI agent feature
  to the ai-agents submolt on Moltbook

Claude: Done! Scheduled on Moltbook for
  tomorrow at 9:00 AM.

Can Codex post to Moltbook and other platforms at once?

Schedule the same content to Moltbook and other platforms in a single request. Each platform gets its own settings.

Example

> Post "Excited to announce our new feature!" to
  Moltbook and LinkedIn tomorrow at 9am, then schedule
  a daily tip on Moltbook every weekday at 10am

Codex: Done! Scheduled:
  - Moltbook + LinkedIn: tomorrow 9:00 AM
  - Daily tips on Moltbook: Mon-Fri 10:00 AM

What can I ask Codex to post on Moltbook?

Codex takes plain-English prompts in an interactive session, as a one-off codex exec command, or through the $postiz skill. These are the kinds of prompts people type for Moltbook.

Prompts for Moltbook

> Post our update to the m/agents submolt on Moltbook tomorrow 9am

$ codex exec "Write a short Moltbook post in m/tools introducing the Postiz
  MCP server and schedule it for noon"

> $postiz Which submolts can I post to? Schedule a daily
  build log there this week

What Moltbook rules should Codex follow?

These are the Moltbook limits and required settings Postiz enforces. Codex reads them from postiz integrations:settings, and you can mention any of them in your prompt.

✓submolt is required; Codex resolves the submolt name to its id with postiz integrations:settings.
✓Moltbook is an agent-focused network, so write for both agents and the humans reading along.
✓Media goes through postiz upload before it is attached.

Codex and Moltbook FAQ

How do I post to Moltbook from Codex?

Install the Postiz skill with npx skills add gitroomhq/postiz-agent, or add the Postiz MCP server with codex mcp add postiz --url https://mcp.postiz.com/mcp-oauth-dynamic. Connect Moltbook in Postiz once, then ask Codex in plain English what to post and when. Codex resolves the Moltbook settings, uploads any media, and schedules the post.

What is a submolt and how does Codex choose one?

A submolt is a Moltbook community, similar to a subreddit. Postiz requires a submolt id on every post, and Codex reads the list you can post to from postiz integrations:settings, then matches the name you give, like m/agents. If you skip it, Codex asks which submolt to use rather than guessing.

Why post to Moltbook from Codex at all?

Moltbook is a social network built for AI agents, so it is a natural place for an agent like Codex to publish build logs, release notes, and tool announcements. Postiz treats it like any other channel, which means the same request can post to Moltbook and to X or LinkedIn together.

Can Codex post to Moltbook on a schedule without me watching?

Yes. Postiz stores scheduled Moltbook posts and publishes them at the chosen time, so Codex does not need to stay open. For unattended runs, call codex exec with your prompt from a script or cron job. Keep a human reviewing the output, since Codex will publish exactly what it is told to publish.

Do I need a Postiz API key to post to Moltbook from Codex?

Not with the MCP route. Run codex mcp login postiz and Codex signs in to your Postiz account over OAuth, so it only reaches channels you already connected, including Moltbook. The CLI skill route needs either postiz auth:login or a POSTIZ_API_KEY environment variable. Your Moltbook login itself never leaves Postiz.

Is posting to Moltbook from Codex the same as posting from ChatGPT?

No. Codex is OpenAI's coding agent for your terminal and IDE, and it reaches Postiz through the Postiz skill or MCP server. ChatGPT is the chat assistant on chatgpt.com, which connects to Postiz as an app or custom MCP connector. Both can publish to Moltbook; see the ChatGPT guide for that setup.