Comparison

OpenTweet vs Postiz

Postiz is an open-source, multi-platform scheduler you can self-host. OpenTweet is the hosted, agent-native posting layer for X. If your job is automating X from code or an AI agent, OpenTweet gives you an MCP server, a REST API, and a CLI with no X developer account and nothing to run.

Get your API key

7-day free trial. No X developer account needed.

Where Postiz shines

Postiz is open-source and posts to many networks, so it is a strong pick if you want to self-host or manage X, LinkedIn, Instagram, and more from one place. OpenTweet is narrower on purpose: it does X, and it does it as a hosted layer your agent can call directly.

Postiz vs OpenTweet, side by side

Postiz
OpenTweet
What it is
Open-source multi-platform scheduler
Hosted, agent-native posting layer for X
MCP server
Yes
Yes, hosted and local, 36 tools
REST API
Yes, on cloud or self-host
Yes, /api/v1 with one bearer key
CLI
No dedicated CLI
Yes, npm i -g @opentweet/cli
Hosting
Self-host or paid cloud
Fully hosted, nothing to run
X developer account
Self-host: bring your own X API keys
Never needed
Scheduling
Yes
Yes, plus an evergreen queue
Threads
Yes
Yes, is_thread and thread_media
X Articles (long-form)
Standard posts
Yes, via API and MCP
Analytics
Yes, multi-platform
Yes, X-native
Platforms
Many networks
X only, in depth
Pricing
Free self-host or paid cloud tiers
$11.99/month flat, hosted

Postiz wins on breadth and self-hosting. For posting to X from an agent, OpenTweet is the deeper, fully hosted choice.

Three ways your agent posts to X

Same account, same key. Reach OpenTweet from an MCP client, straight HTTP, or a terminal.

Hosted MCP server

Point any MCP client at https://mcp.opentweet.io/mcp with a bearer header. 36 X tools, nothing to run.

REST API

One endpoint to create, schedule, and publish. Base is https://opentweet.io/api/v1.

CLI for CI

npm i -g @opentweet/cli, then opentweet tweet "..." --now. Set OPENTWEET_API_KEY in CI.

Built for agents

A posting layer designed for AI agents and automations, not a dashboard bolted onto an API.

One call to post, no server to run

Posting a tweet is a single authenticated request. Publish now, or schedule with an ISO 8601 date.

bash
curl -X POST https://opentweet.io/api/v1/posts \
  -H "Authorization: Bearer ot_your_key" \
  -H "Content-Type: application/json" \
  -d '{"text":"Shipped a new release today.","publish_now":true}'

Prefer an agent? Point any MCP client at the hosted server.

mcp.json
{
  "mcpServers": {
    "opentweet": {
      "command": "npx",
      "args": ["-y", "@opentweet/mcp-server"],
      "env": { "OPENTWEET_API_KEY": "ot_your_key" }
    }
  }
}

Or use the hosted endpoint at https://mcp.opentweet.io/mcp over streamable-http with a bearer header.

From CI or a terminal, the CLI does the same job.

bash
npm install -g @opentweet/cli
opentweet auth
opentweet tweet "Shipped a new release today." --now

Get your key first

Grab an API key with the ot_ prefix at https://opentweet.io/developer, verify it with GET /me, then send your first post.

Which one is right for you

Pick Postiz if

  • You want open-source you can self-host and modify
  • You post to many networks, not just X
  • You are happy to run infrastructure and bring your own X API keys

Pick OpenTweet if

  • Posting to X from an agent or app is the job
  • You want a hosted MCP server, REST API, and CLI without running a server
  • You would rather never touch an X developer account

Frequently asked questions

What is the difference between OpenTweet and Postiz?

Postiz is an open-source, multi-platform social media scheduler you can self-host or use as a paid cloud. OpenTweet is a hosted posting layer built specifically for X, with a REST API, a CLI, and an MCP server for AI agents. If you are automating X from code or an agent and do not want to run infrastructure or manage X API credentials, OpenTweet is the more direct fit.

Is OpenTweet a good Postiz alternative for AI agents?

Yes. OpenTweet ships a hosted MCP server at https://mcp.opentweet.io/mcp with 36 tools, plus a REST API at https://opentweet.io/api/v1 and a CLI. Your agent authenticates with one bearer key and can create tweets, threads, and X Articles, schedule them, and read analytics without you standing up a server.

Do I need an X developer account with OpenTweet?

No. You connect your X account once with a normal login and OpenTweet gives you an API key. With self-hosted Postiz you typically bring your own X API credentials, which means a developer application and OAuth setup. OpenTweet never asks for that.

Postiz is open-source. Why would I pay for OpenTweet?

Postiz being open-source and multi-platform is a real strength if you want to self-host or post to many networks. OpenTweet trades breadth for depth on X and removes the operational work: no server to run, no X API keys to rotate, and an MCP server, REST API, and CLI that are hosted and maintained for you at a flat price.

Can I schedule threads and long-form articles through OpenTweet?

Yes. Threads use is_thread with thread_tweets and thread_media on POST /posts. X Articles (long-form) can be created and published through the API and the MCP server. Scheduling uses scheduled_date in ISO 8601, and OpenTweet also includes an evergreen queue for recycling posts.

Keep exploring

Post to X from an MCP client, straight HTTP, or an agent. Start anywhere.

All comparisons

See how OpenTweet stacks up against other X and social posting tools.

MCP server

Give your agent an X posting tool. Hosted and local setup in minutes.

API docs

The REST reference: posts, threads, scheduling, batch, media, and accounts.

OpenTweet for AI agents

Why automation and agent workloads are the core use case.

The hosted way to post to X

Connect X, get your key, and post from your code or your agent today.

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