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How to connect Claude to Tesselith

Add Tesselith to Claude as a custom connector and schedule social posts from claude.ai, the Claude desktop app and Claude on your phone. Claude 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 Claude account (custom connectors work on Free, Pro, Max, Team and Enterprise; Free allows one custom connector) 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. Claude connects to Tesselith from Anthropic's cloud, so there is nothing to install on your computer.

1 · Connect · a few minutes

Run this

Customize → Connectors → Add custom connector
Name:  Tesselith
URL:   https://api.tesselith.com/mcp

Leave Authentication on sign-in and the OAuth client on Claude's published identity. Claude finds Tesselith's sign-in automatically.

2 · Ask · live in Tesselith

Ask Claude to post for you

Queue three posts about our launch for next week on Instagram and Bluesky.

Used Tesselith · create_draft · add_to_queue

Done. I created three posts and added them to each channel's queue: Tuesday 9:00, Wednesday 12:30 and Thursday 9:00. Each one links to Tesselith if you want to edit before they go out.

Also try:

  • “What's going out on Instagram this week? Any gaps?”
  • “Turn this blog post into a five-post Threads series, one a day from Monday.”
  • “Which channel needs reconnecting?”

The setup at a glance

  1. Open Customize → Connectors in Claude
  2. Paste the Tesselith server URL
  3. Connect and approve the workspace
  4. Turn the connector on in a chat
  5. Ask for your first post

One connection, every channel

Connect your accounts in Tesselith once. From then on Claude 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 Claude to Tesselith, step by step?

  1. 1. Open Customize → Connectors in Claude

    On claude.ai or in the Claude desktop app, open Customize → Connectors, click + Add and choose Add custom connector. On older versions the same page is under Settings → Connectors. On Team and Enterprise, an owner adds it under Organization settings → Connectors first, and each member then clicks Connect.

  2. 2. Paste the Tesselith server URL

    Name it Tesselith, paste the URL and click Continue. Claude detects the authentication settings; keep the recommended options and click Add.

    Server URL
    https://api.tesselith.com/mcp

  3. 3. Connect and approve the workspace

    Click Connect on the new connector. A Tesselith window opens. Sign in, pick the workspace, untick anything you don't want the agent to do, and click Allow access.

  4. 4. Turn the connector on in a chat

    In a conversation, click + at the bottom left, open Connectors and switch Tesselith on. From the same menu you can turn off individual tools, for example publish_now and delete_post, if you only want drafts and queued posts.

  5. 5. Ask for your first post

    Ask Claude to list your Tesselith channels. If it names your accounts, everything works. Then ask it to queue a draft and open the link it returns to check it in Tesselith.

What can Claude do in Tesselith?

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

Tesselith MCP tools available to Claude
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 Claude not working with Tesselith?

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

Troubleshooting Claude with Tesselith
Fix
The connector won't connectCheck the URL is exactly the one above, with https and /mcp. Remove the connector and add it again to restart the sign-in.
Free plan won't add a second connectorFree accounts can add one custom connector. Remove another one, or upgrade your Claude plan.
Team member can't see Add custom connectorOn Team and Enterprise only owners can add connectors. Ask an owner to add Tesselith under Organization settings → Connectors, then click Connect.
Claude answers without using TesselithThe connector isn't switched on in this chat. Click + → Connectors and turn Tesselith on.
You need to change the URL or permissionsConnectors can't be edited in place. Remove it from Customize → Connectors and add it again.
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.

Claude and Tesselith: frequently asked questions

Does Tesselith work in the Claude desktop and mobile apps?
Yes. Connectors belong to your Claude account, so once you add Tesselith on claude.ai or in the desktop app it's available in Claude on your phone too.
Do I need an API key to connect Claude?
No. Claude signs in with your Tesselith account through OAuth, and you approve the workspace and permissions on a consent screen.
Will Claude post without asking me?
Claude asks before each tool call unless you choose Allow always. Publishing now and deleting also need an explicit confirmation from Tesselith's side. To keep everything as drafts, untick Schedule and queue on the consent screen.
Is it safe to use Research mode with Tesselith?
Research mode can call connector tools without asking each time, so turn off the write tools (publish_now, delete_post, schedule_post) in the chat's tools menu first.
How do I disconnect Claude?
In Tesselith, open Settings → AI assistants and click Disconnect. Access ends on Claude's next request. You can also remove the connector in Claude.

Claude’s own documentation: Anthropic docs.

Connect other AI agents

Claude CodeClaude CoworkChatGPTCodexOpenAI APICursorVS Code (GitHub Copilot)WindsurfZedClineGemini CLIHermes AgentOpenClawGoosen8nMistral Le ChatPerplexityManus

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