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How to connect n8n to Tesselith

Give an n8n AI Agent Tesselith's tools with the MCP Client Tool node and automate social scheduling in your workflows. n8n 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 n8n with the AI Agent and MCP Client Tool nodes, a Tesselith API key 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. Update n8n if your MCP Client Tool only shows an SSE Endpoint field.

1 · Connect · a few minutes

Run this

MCP Client Tool node
MCP Endpoint URL:  https://api.tesselith.com/mcp
Server Transport:  HTTP Streamable
Authentication:    Bearer Auth
Credential:        your Tesselith API key (tsl_live_…)

2 · Ask · live in Tesselith

Ask n8n to post for you

New blog post published: draft social posts for every channel.

Used Tesselith · list_channels · create_draft

Created drafts for 5 channels from the RSS item, saved in Tesselith for approval.

Also try:

  • “When a form is submitted, queue a thank-you post on Telegram.”
  • “Every Monday, summarise last week's published posts to Slack.”
  • “Turn new YouTube uploads into Threads and Bluesky drafts.”

The setup at a glance

  1. Create a Bearer Auth credential
  2. Add the MCP Client Tool to an AI Agent
  3. Configure the node
  4. Test the workflow

One connection, every channel

Connect your accounts in Tesselith once. From then on n8n 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 n8n to Tesselith, step by step?

  1. 1. Create a Bearer Auth credential

    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. In n8n, create a Bearer Auth credential and paste the key.

  2. 2. Add the MCP Client Tool to an AI Agent

    Add an AI Agent node, then attach MCP Client Tool under its Tools connection.

  3. 3. Configure the node

    Set the endpoint, choose HTTP Streamable, set Authentication to Bearer Auth and select the credential. Under Tools to Include, pick Selected to expose only what the workflow needs.

  4. 4. Test the workflow

    Open the node and check the tool list loads, then send a chat message such as "list my channels".

What can n8n do in Tesselith?

The server at https://api.tesselith.com/mcp exposes these tools. n8n only gets the permissions you approve, and never more than your own role.

Tesselith MCP tools available to n8n
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 n8n not working with Tesselith?

Almost every failure is one of these. Tesselith returns a readable error, so asking n8n“what went wrong?” usually points at the right row.

Troubleshooting n8n with Tesselith
Fix
Empty tool listServer Transport is set to SSE, or the URL is missing /mcp. Choose HTTP Streamable.
Only an SSE Endpoint fieldYou're on an older node version. Update n8n.
Tool calls time outRaise Timeout under the node's Options.
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.

n8n and Tesselith: frequently asked questions

Can n8n use OAuth instead of an API key?
Newer n8n versions include an MCP OAuth2 credential. An API key with limited scopes is simpler for automated workflows.
Does Tesselith also have a REST API for n8n?
Yes. Use the HTTP Request node with the /v1 API for fixed steps, and the MCP Client Tool when an AI Agent decides what to do.

n8n’s own documentation: n8n docs.

Connect other AI agents

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Create your Tesselith account, connect your channels, and n8n can start scheduling in minutes.

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