MCP server

Fuxux's hosted MCP server: the endpoint, signing in or using an API key, client setup, the tools and the limits.

Fuxux runs a hosted MCP server over Streamable HTTP. Connect any MCP client and your agent can list your accounts and posts, and draft, schedule and publish to 14 networks. Full client-by-client setup is on the MCP setup guide.

Using Cursor, Claude Code or another coding assistant with the Context7 MCP server? These docs are indexed there: add use context7 to your prompt, or ask for the library /llmstxt/fuxux_llms_txt (Fuxux on Context7). The API reference is indexed too, as Fuxux API.

Endpoint

https://www.fuxux.com/api/mcp

Stateless: send JSON-RPC with POST. There is no SSE stream, so GET returns 405.

Authentication

Sign in (OAuth)

Add the endpoint with no header. The client opens Fuxux in the browser, you sign in and choose Allow access. Works on any plan, including Free. For client developers: OAuth 2.1 with PKCE, metadata at /.well-known/oauth-authorization-server, Client ID Metadata Documents and dynamic client registration supported, access tokens last an hour and are refreshed.

API key

For clients without sign-in (scripts, some agents), send a key on every request. API keys need a paid plan with the API add-on ($5/month). Keys start with fx_live_ and are created on the API keys page.

Authorization: Bearer fx_live_your_key_here

Clients that can't add the Bearer prefix can send x-api-key: fx_live_… instead.

Quick setup

Claude Code, signing in:

claude mcp add --transport http fuxux https://www.fuxux.com/api/mcp

Cursor (~/.cursor/mcp.json), with a key in the FUXUX_API_KEY environment variable:

{
  "mcpServers": {
    "fuxux": {
      "url": "https://www.fuxux.com/api/mcp",
      "headers": { "Authorization": "Bearer ${env:FUXUX_API_KEY}" }
    }
  }
}

Tools

Tool	What it does
`whoami`	Checks the connection and returns your email and plan.
`list_connected_accounts`	Your connected social accounts, with the ids `create_post` targets use.
`get_dashboard`	Stats, upcoming posts and accounts that need attention.
`list_posts`	The queue, filtered by `month`, `status` (scheduled, published, draft, failed), with `limit` (1–50), `offset` and `order`.
`create_post`	Publish now, schedule with `scheduled_at`, or save a draft with `draft: true`. `targets` picks accounts; captions can differ per platform.
`get_post`	One post with its per-platform versions and results.
`update_post`	Reschedule, edit captions or replace media on a draft or scheduled post.
`delete_post`	Deletes a post from Fuxux (not from the network if already published).

Platform ids: twitter, instagram, linkedin, facebook, tiktok, youtube, bluesky, threads, pinterest, discord, kick, twitch, telegram, slack.

Limits

120 requests a minute per API key, and 300 a minute per account across all keys and signed-in apps. Over the limit, tools say how many seconds to wait.
Don't poll: publishing settles within minutes, so check a post with get_post at most once a minute.
When a network rule blocks a post (for example, Instagram needs an image or video), the tool returns the reason as an error.

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