# Post to X from Claude, ChatGPT and Cursor

> Let Claude, ChatGPT, Claude Code or Cursor post, reply, like and answer DMs on your own X account through the hosted MCP server. Setup for each app, example prompts, cost and safety.

HTML page: https://www.twittrapi.com/blog/post-to-x-from-claude-chatgpt
Published 2026-11-09.

Claude and ChatGPT can write a good tweet, but they cannot post it. You copy the text, open X, paste it and post it yourself. With an MCP server that has account tools, the assistant posts it for you, after you approve it in the chat.

This guide sets that up with the [hosted Twitter MCP server](https://www.twittrapi.com/twitter-mcp-server) of TwittrAPI, which we run. No X developer account and nothing to install. If you only want the assistant to read X, the [read guide](https://www.twittrapi.com/blog/twitter-mcp-server-claude-cursor) is enough.

## What the assistant can do

| Area | Tools |
| --- | --- |
| Post | `create_tweet`, `reply_to_tweet`, `delete_tweet`, `create_draft`, `list_drafts` |
| Engage | `like_tweet`, `retweet`, `bookmark_tweet`, `follow_user` and their undo tools |
| Direct messages | `list_dm_conversations`, `send_dm`, `list_dm_requests`, `accept_dm_request`, `decline_dm_request` |
| Lists and bookmarks | `create_list`, `add_list_member`, `remove_list_member`, bookmark folders and bookmark search |
| Articles | Write, update and publish X Articles |

It still has all the read tools: profiles, tweets, replies, search, followers, lists, communities and trends.

## What you need

1. **A TwittrAPI account with balance.** Create one on [/start](https://www.twittrapi.com/start). The account tools work after your first top-up; free trial credit only covers reads.
2. **Your X session.** The cookie of a browser that is logged in to x.com, with `auth_token` and `ct0` in it. [How to copy it](https://www.twittrapi.com/docs/x-session#copy-the-cookie-from-your-browser) in Chrome, Edge, Firefox or Safari.
3. **A proxy** in the form `http://user:pass@host:port`. Requests to X go out through it. Use one in the region the account usually logs in from. [More on the proxy](https://www.twittrapi.com/docs/x-session#the-proxy).

Use a dedicated account rather than your main one. X can limit accounts that post, follow or like automatically.

## Claude.ai and ChatGPT: save the session in the dashboard

Claude.ai, Claude Desktop and ChatGPT cannot send custom headers, so you save the session once in your TwittrAPI dashboard.

1. Open **Connected apps** in the dashboard. Under **Act on your X account**, paste the cookie, enter the proxy and, if the assistant should send DMs, your X Chat passcode. Click **Save X session**.
2. Add the connector with the URL `https://mcp.twittrapi.com/mcp`:
   - **Claude.ai and Claude Desktop:** **Settings > Connectors > Add custom connector**.
   - **ChatGPT:** turn on **Developer mode** under **Settings > Apps & Connectors > Advanced settings**, then **Create** with authentication **OAuth**.
3. Log in to TwittrAPI. On the consent page, tick **Also act on my X account** and click **Allow access**.

Already connected before? That connection can only read. Remove the connector and add it again, this time with the box ticked. **Connected apps** shows which apps may act on your account.

## Claude Code and Cursor: send the session in headers

These apps let you set headers, so the session never has to be saved anywhere but your own machine. Put the values in environment variables first:

```bash
export TWITTRAPI_API_KEY="your-key"
export TWITTRAPI_X_COOKIE="auth_token=...; ct0=...; twid=u%3D..."
export TWITTRAPI_X_PROXY="http://user:pass@host:port"
```

**Claude Code:**

```bash
claude mcp add --transport http twittrapi https://mcp.twittrapi.com/mcp \
  --header "Authorization: Bearer $TWITTRAPI_API_KEY" \
  --header "X-Twitter-Cookie: $TWITTRAPI_X_COOKIE" \
  --header "X-Twitter-Proxy: $TWITTRAPI_X_PROXY"
```

**Cursor** (`~/.cursor/mcp.json`):

```json
{
  "mcpServers": {
    "twittrapi": {
      "url": "https://mcp.twittrapi.com/mcp",
      "headers": {
        "X-API-KEY": "${env:TWITTRAPI_API_KEY}",
        "X-Twitter-Cookie": "${env:TWITTRAPI_X_COOKIE}",
        "X-Twitter-Proxy": "${env:TWITTRAPI_X_PROXY}"
      }
    }
  }
}
```

For DMs, add `X-Twitter-Chat-Passcode` with your X Chat passcode. VS Code works the same way; the [setup docs](https://www.twittrapi.com/docs/hosted-mcp#headers-claude-code-cursor-vs-code) have a config that asks for the values instead of storing them.

## Try it

Ask in plain words. The assistant picks the tools:

- "Write a short post announcing our new pricing page and show it to me before you post it."
- "Read the replies under my last tweet and draft an answer to each question. Post the ones I approve."
- "Like the five newest posts from @XDevelopers."
- "Show my unanswered DM requests and accept the ones from people I follow."
- "Save this thread as a draft; I will post it tomorrow."

Before a tool changes anything, Claude, ChatGPT and Cursor show you the call and its text and wait for your approval. Keep those prompts on and read the text before you allow it.

## What it costs

Every tool call is one API call, the same price for a post as for a read: $0.10 per 1,000 calls on Standard and less at volume. A post with a link costs the same as one without. There is no monthly fee for the server.

## Safety

- Anyone with the cookie can use your X account. Only put it into apps and config files you control, and never commit it.
- The assistant never sees the cookie or the proxy. They travel in the connection settings, not in the chat.
- **Delete** under **Connected apps** removes the saved session at once; every app is back to reading. **Disconnect** removes one app.
- If the assistant says the session may be logged out, log in to x.com again and save the new cookie.

## FAQ

### Do I need an X developer account?

No. The server acts with your X session, not with an X developer app.

### Can I use a different X account per app?

With headers, yes: each app sends its own session. The dashboard stores one session per TwittrAPI account, used by every app you allowed to act.

### Why does the assistant say it cannot post?

The app was connected without **Also act on my X account**, or no session is saved. Save it under **Connected apps**, then remove the connector and add it again with the box ticked. With headers, send both `X-Twitter-Cookie` and `X-Twitter-Proxy`.

### Can it post images or polls?

Polls and quote tweets, yes. For images, videos and scheduled posts use the [account actions](https://www.twittrapi.com/docs/account-actions) of the API directly.