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How to connect Cursor to Tesselith

Add Tesselith to Cursor's mcp.json and let Cursor's agent draft and schedule social posts while you code. Cursor talks to Tesselith’s MCP server, so it can draft, queue and schedule posts on every channel you’ve connected. Keep a human in the loop: publishing now and deleting always ask for your confirmation.

Join the waitlistMCP docs

What do I need before connecting?

You need a recent version of Cursor and a Tesselith workspace on Pro, Team or Agency (every new workspace starts with a 14-day Pro trial) with at least one channel connected.

1 · Connect · a few minutes

Run this

~/.cursor/mcp.json
{
  "mcpServers": {
    "tesselith": {
      "url": "https://api.tesselith.com/mcp"
    }
  }
}

Use ~/.cursor/mcp.json for every project, or .cursor/mcp.json for one repo.

2 · Ask · live in Tesselith

Ask Cursor to post for you

Write a launch post for this feature and queue it on X and Bluesky.

Used Tesselith · create_draft · add_to_queue

Created the post from the README section you have open and queued it: X at 10:00 and Bluesky at 10:30 tomorrow.

Also try:

  • “List my Tesselith channels.”
  • “Draft a changelog post from the last five commits.”
  • “What's in my queue for next week?”

The setup at a glance

  1. Add Tesselith to mcp.json
  2. Enable it and sign in
  3. Check the tools
  4. Ask the agent

One connection, every channel

Connect your accounts in Tesselith once. From then on Cursor can plan and schedule for any of them, and Tesselith publishes at the time you set, even after the conversation ends.

  • XSoon
  • Instagram
  • Facebook
  • LinkedInSoon
  • Threads
  • YouTube
  • TikTokSoon
  • DiscordSoon
  • Telegram
  • RedditSoon
  • PinterestSoon
  • Bluesky
  • Mastodon
  • Dev.toSoon
  • HashnodeSoon

How do I connect Cursor to Tesselith, step by step?

  1. 1. Add Tesselith to mcp.json

    Create or open ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project) and add the server. Leave out headers to sign in with your Tesselith account.

  2. 2. Enable it and sign in

    Open Cursor's MCP settings (Customize, or Settings → Tools & MCP on older versions), find tesselith and enable it. Cursor opens your browser to sign in. A Tesselith window opens. Sign in, pick the workspace, untick anything you don't want the agent to do, and click Allow access.

  3. 3. Check the tools

    The server should show as enabled with its tools listed. If not, open Output (Cmd/Ctrl+Shift+U) and choose MCP Logs.

  4. 4. Ask the agent

    In the agent chat, ask Cursor to list your Tesselith channels, then to draft a post from the file you're working on.

Can I use an API key instead of signing in?

To skip the browser sign-in, reference a key from your environment with ${env:…}. In Tesselith, open Settings → Developers, create an API key and tick only the scopes the agent needs. Keys start with tsl_live_ and are shown once, so store it in your password manager or a secret store. Start Cursor from a shell where the variable is exported.

~/.cursor/mcp.json
{
  "mcpServers": {
    "tesselith": {
      "url": "https://api.tesselith.com/mcp",
      "headers": {
        "Authorization": "Bearer ${env:TESSELITH_API_KEY}"
      }
    }
  }
}

What can Cursor do in Tesselith?

The server at https://api.tesselith.com/mcp exposes these tools. Cursor only gets the permissions you approve, and never more than your own role.

Tesselith MCP tools available to Cursor
What it does
list_channelsLists your connected accounts and their status
list_posts / get_postFinds posts by status or channel, or reads one
get_queueShows a channel's upcoming posts and free slots
suggest_best_timeSuggests the next free slot and your best hours
get_analytics_summaryCounts active channels, drafts and published posts
create_draftDrafts a post for one or more channels
update_postChanges a post's text, channels or media
add_to_queueGives a post the channel's next free slot
schedule_postPins a post to an exact time
upload_media_from_urlAttaches an image or video from a public URL
publish_nowPublishes within a minute, only after you confirm
delete_postDeletes a post, only after you confirm

Why is Cursor not working with Tesselith?

Almost every failure is one of these. Tesselith returns a readable error, so asking Cursor“what went wrong?” usually points at the right row.

Troubleshooting Cursor with Tesselith
Fix
Cursor never asks you to sign inA headers entry is set. Remove it, then toggle the server off and on.
${env:TESSELITH_API_KEY} is emptyCursor was opened from the dock, not a shell with the variable. Run cursor . from that shell, or restart.
The server shows as failedOpen Output → MCP Logs for the error, then toggle the server off and on.
Two Tesselith entriesA project .cursor/mcp.json and the global file both define it. Keep one.
403: your plan doesn't include API accessMCP is included on Pro, Team and Agency. New workspaces get a 14-day Pro trial; upgrade under Settings → Billing.
401: connection revoked or lost accessSomeone disconnected the assistant in Settings → AI assistants, or your role changed. Connect again and approve the workspace.
The assistant can read posts but can't scheduleYou unticked Schedule and queue on the consent screen. Disconnect and connect again, keeping that permission.
No channels foundThe assistant only sees accounts already connected in Tesselith. Connect them under Channels first.
Post scheduled at the wrong timeTell the assistant your time zone. Tesselith takes ISO 8601 times with an offset, and your workspace time zone is shown in get_queue.
429: rate limitedEach connection can make 120 requests a minute on Pro, 300 on Team and 600 on Agency. Wait for the Retry-After seconds.

Cursor and Tesselith: frequently asked questions

Global or project mcp.json?
Global (~/.cursor/mcp.json) if you want Tesselith in every project; project (.cursor/mcp.json) to share it with a team, without credentials in the file.
Do Cursor's cloud agents use my Tesselith connection?
Cloud agents keep their own sign-in. Connect Tesselith for them separately in Cursor's MCP settings.
Can I commit mcp.json?
Yes, as long as it has no literal API key. Use ${env:TESSELITH_API_KEY} or the browser sign-in.

Cursor’s own documentation: Cursor docs.

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