OmniX MCP — Free X (Twitter) API for Claude, Cursor & any MCP client

The official **OmniX** MCP server — give Claude, Cursor, and any

Model Context Protocol client **direct access to the

X (Twitter) API. Search tweets, look up users, read followers and replies, post

tweets, send DMs, follow users, and publish articles** — all from your AI assistant.

Unlike read-only Twitter MCP servers, OmniX MCP can act: post, reply, like, retweet,

bookmark, follow, send DMs, and publish long-form articles — not just read. 55 tools in all.

> ⚡ Start free — get a free API key and free trial credits.

> No X developer account, no OAuth app, no approval wait. Flat $0.001 per call after your free credits.

→ **Get your free API key · Docs · Pricing**

Why OmniX MCP?

• 🆓 Free to start — a free API key and free trial credits, no credit card to try it.
• ✍️ **Read *and* write** — post tweets, send DMs, follow, like, retweet, publish articles.
• 🧩 Works everywhere — Claude Desktop, Claude Code, Cursor, Windsurf, and any MCP client.
• 🚀 No X developer account needed — use your normal X login (`auth_token` cookie).
• 💸 Simple pricing — flat $0.001 per successful call; account tools are free.
• 🛠️ 55 tools across tweets, users, articles, lists, media, and direct messages.

Install

Add it to your MCP client config (Claude Desktop, Cursor, Windsurf, …):

{
  "mcpServers": {
    "omnix": {
      "command": "npx",
      "args": ["-y", "omnix-mcp@latest"],
      "env": {
        "OMNIX_KEY": "omnix_live_...",
        "X_AUTH_TOKEN": "your_x_auth_token"
      }
    }
  }
}

Or with the Claude Code CLI:

claude mcp add omnix \
  -e OMNIX_KEY=omnix_live_... \
  -e X_AUTH_TOKEN=your_x_auth_token \
  -- npx -y omnix-mcp@latest

Get your free `OMNIX_KEY` from the OmniX dashboard.

Configuration (env)

Your credentials are never exposed to the model as tool arguments — the server injects

them as headers only on the calls that need them.

Getting your `auth_token`

It's the cookie `x.com` sets after you log in — copy it with the free Cookie-Editor

extension, or from dev tools: Application → Cookies → `https://x.com` → `auth_token`.

Full guide: docs.omnixapi.com/authentication.

What you can ask your assistant

> "Find Elon Musk's latest tweets"

> "Search X for posts about OpenAI from the last week"

> "Who are @vercel's verified followers?"

> "Post 'shipping 🚀' to my X account"

> "Send a DM to @jack saying hi"

> "Publish this markdown as an X Article"

Tools (55)

Read tools are marked `readOnlyHint`; `delete_tweet`, `unpublish_article`, `delete_article`

and `delete_dm` are marked `destructiveHint` so clients can confirm before running them.

Pricing

• Free API key + free trial credits to start — sign up.
• Flat $0.001 per successful call (no per-endpoint pricing).
• The two account tools (`get_account_info`, `get_payment_history`) are free.

See omnixapi.com/pricing.

FAQ

Is there a free X (Twitter) API?

Yes. OmniX gives you a free API key and free trial credits so you can start without a

credit card. After the free credits, it's a flat $0.001 per successful call.

How do I use the X / Twitter API inside Claude or Cursor?

Install this MCP server (see Install) with your free `OMNIX_KEY`. Your assistant

can then search tweets, read users, post, and send DMs through natural language.

Do I need an X developer account or API keys from X?

No. You don't need X's official developer program or an OAuth app. You authenticate with your

normal X login cookie (`auth_token`) plus a free OmniX key.

Can it post tweets and send DMs, or is it read-only?

It can act — post tweets, reply, like, retweet, bookmark, follow/unfollow, send and react

to DMs, and publish X Articles — as well as read.

Which MCP clients are supported?

Any Model Context Protocol client — Claude Desktop, Claude Code, Cursor, Windsurf, and more.

Is this the official X API?

No. OmniX is an independent third-party X (Twitter) API for developers and researchers. It is

not affiliated with, endorsed by, or sponsored by X Corp.

Develop

npm install
npm run build      # tsc → dist/
npm start          # run the built server over stdio

Tools live in `src/tools/*.ts`, one declarative `ToolDef` per endpoint; `src/register.ts`

turns each into a `registerTool` call and `src/client.ts` forwards it to the API.

Links

• 🌐 Website: omnixapi.com
• 📚 Docs: docs.omnixapi.com
• 💳 Pricing: omnixapi.com/pricing
• 🔑 Free API key: omnixapi.com/dashboard

License

MIT