Post to Warpcast from Codex

Codex can post casts to Warpcast on the Farcaster protocol through Postiz. Install the Postiz skill or add the Postiz MCP server to Codex, connect your Farcaster account in Postiz, then ask. Codex writes the cast, targets a channel like /dev if you name one, attaches uploaded media, and schedules it.

Setup Guide GitHub

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

Last updated: September 2026

How do I post to Warpcast from Codex?

Set up Codex once with the Postiz skill or the Postiz MCP server, connect Warpcast 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:
> Cast our launch update to the
  /dev channel on Warpcast tomorrow at 9am

Codex: Done! Your Warpcast post is scheduled.

Warpcast-Specific Features

📡

Farcaster Protocol

Post directly to the Farcaster decentralized social protocol. Your casts are stored on-chain and accessible across all Farcaster clients.

📢

Channel Targeting

Target specific Farcaster channels to reach the right audience. Post to niche communities and topic-focused channels.

🌐

Decentralized Social

Own your social graph. Warpcast posts live on the Farcaster protocol, giving you portability and censorship resistance.

💬

Cast Composition

Compose casts with text content and optional channel targeting. Keep your messaging concise and impactful for the Farcaster audience.

🔍

Channel Discovery

Browse and target from thousands of Farcaster channels. Reach communities focused on crypto, tech, art, and more.

📅

Scheduled Casting

Schedule casts with precise timestamps. Plan your Farcaster engagement ahead of time and cast at peak activity hours.

How does Codex post to Warpcast?

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 Warpcast Integration

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

Example conversation

> Is my Warpcast account connected to Postiz?

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

Choose Your Channel

Optionally target a specific Farcaster channel for your cast. If no channel is specified, the cast will be posted to your main feed.

Example conversation

> Draft a Warpcast post about our new
  feature launch

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

Create Your Cast

Schedule a Warpcast post with your content and optional channel targeting. Casts are published to the Farcaster protocol for decentralized distribution.

Example conversation

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

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

Warpcast Settings Reference

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

Field	Type	Required	Description
`__type`	string	Yes	Must be "warpcast"
`subreddit`	array	No	Array of channel objects: [{value: {id}}]
`subreddit[].value.id`	string	Yes	Farcaster channel ID to target

Common Configurations

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

Simple Cast (No Channel)

Just ask

> Post it with: Simple Cast (No Channel)

Codex: Got it. Applying:
  (defaults)

Cast to a Specific Channel

Just ask

> Post it with: Cast to a Specific Channel

Codex: Got it. Applying:
  subreddit: {'id': 'dev'}

Cast to Crypto Channel

Just ask

> Post it with: Cast to Crypto Channel

Codex: Got it. Applying:
  subreddit: {'id': 'crypto'}

Cast to Design Channel

Just ask

> Post it with: Cast to Design Channel

Codex: Got it. Applying:
  subreddit: {'id': 'design'}

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 Warpcast 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 Warpcast 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 Warpcast"

Warpcast 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 Warpcast about our
  new feature launch, schedule for
  tomorrow at 9am"

Codex: I'll handle that.
  Found your Warpcast 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 Warpcast

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 Warpcast 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 channels for focused community engagement
✓Cross-post to Warpcast + 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 Warpcast
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>

# Warpcast Settings
subreddit (optional array of channels),
each with: id (channel 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 Warpcast 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 Warpcast integration, composes your cast with optional channel targeting, and publishes it to Farcaster.

Claude Code

> Cast about our product launch to the
  dev and crypto channels on Farcaster

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

Can Codex post to Warpcast and other platforms at once?

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

Example

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

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

What can I ask Codex to post on Warpcast?

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 Warpcast.

Prompts for Warpcast

> Cast our launch update to the /dev channel on Warpcast
  tomorrow 9am with ./assets/banner.png

$ codex exec "Post a short cast about today's release to Warpcast, no channel"

> $postiz Schedule a daily build-in-public cast on Warpcast at 5pm
  this week from ./notes/daily.md

What Warpcast rules should Codex follow?

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

✓Standard Farcaster casts are limited to 320 characters, so Codex keeps them short.
✓Channel targeting is optional; Codex places the Farcaster channel id in the channel target array.
✓Media goes through postiz upload before it is attached.

Codex and Warpcast FAQ

How do I post to Warpcast 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 Warpcast in Postiz once, then ask Codex in plain English what to post and when. Codex resolves the Warpcast settings, uploads any media, and schedules the post.

Can Codex post to a specific Farcaster channel?

Yes. Name the channel, for example /dev or /design, and Codex places its id in the channel target setting. Leave it out and the cast goes to your main feed. Postiz reuses the same array structure it uses for subreddits, so you can target more than one channel in a single request.

How long can a Warpcast cast from Codex be?

Standard Farcaster casts are limited to 320 characters, so Codex keeps the text short and puts longer context in an image or a link. If you paste a long update, ask Codex to trim it to one cast or to split it into a few casts scheduled minutes apart.

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

Yes. Postiz stores scheduled Warpcast 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 Warpcast 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 Warpcast. The CLI skill route needs either postiz auth:login or a POSTIZ_API_KEY environment variable. Your Warpcast login itself never leaves Postiz.

Is posting to Warpcast 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 Warpcast; see the ChatGPT guide for that setup.