Monitor Bluesky Mentions with n8n and Claude

Bluesky is growing fast — ATProto Spaces just launched this week, pulling even more attention to the platform. But most social-listening tools don't cover it yet, so brand mentions pile up unread. This workflow checks Bluesky for your brand name every morning, asks Claude to rate sentiment and flag anything that needs a reply, then drops a tidy summary into a Slack channel.

How it flows

Create a free n8n Cloud account

n8n is a visual automation tool — think of it as a flowchart where each box does one job. Go to n8n.io and click Get started free. Sign up and you land on the n8n Cloud dashboard. A free trial is available for new users with no card required to start.

n8n · Home dashboard

1 Start a new workflow

+ New workflow

2 Rename the workflow

NameBluesky Brand Monitor

Click the name at the top of the canvas to rename

Add a Schedule Trigger

A trigger is what kicks the workflow off. Click Add first step (or press N) to open the node search panel. Search for Schedule Trigger and select it. Set it to run once a day at a time that suits you — 8 AM is a good default. This node has no external account to connect; it just uses n8n's built-in clock.

n8n · Node search panel

1 Open node search

Add first step

2 Find the trigger

Schedule Trigger

ST Schedule TriggerCore node

C CronCore node

3 Configure the schedule

Trigger intervalDays

Trigger at hour8

Trigger at minute0

Search Bluesky with an HTTP Request node

Bluesky's AT Protocol — the open network underneath Bluesky — has a public search endpoint anyone can call. You'll use n8n's HTTP Request node to call it. Click the + connector on your Schedule Trigger node to add the next step, search for HTTP Request, and select it. Paste the URL below into the URL field and replace `YourBrand` with your actual brand name.

n8n · HTTP Request node

1 Add the next node

HTTP Request

HR HTTP RequestCore node

2 Configure the request

MethodGET

URLhttps://api.bsky.app/xrpc/app.bsky.feed.searchPosts

AuthenticationNone (public endpoint)

3 Add query parameters

q→YourBrand

limit→25

sort→latest

Click 'Add parameter' for each row

4 Test the call now

Test step

Extract the post texts with an Edit Fields node

The API returns a nested JSON object (a structured blob of data). Before Claude can read it, you need to pull out just the post text from each result. Add an Edit Fields (Set) node. You'll write a short expression — n8n's way of picking a value from earlier data — to grab the text field from each post. n8n shows you the available fields on the left as you type.

n8n · Edit Fields (Set) node

1 Add next node

Edit Fields

EF( Edit Fields (Set)Core node

2 Map the field you need

postText→{{ $json.posts.map(p => p.record.text).join(' | ') }}

Use the expression editor (grey {} icon) to paste the expression

3 What this expression does

It joins the text of all returned posts into one string, separated by |, so Claude can read them in a single message. n8n expressions guide →

Connect Claude to summarise and flag

Now add a Basic LLM Chain node — this is n8n's simple way to send a prompt to an AI and get text back. Inside it you'll attach a Anthropic Chat Model sub-node, which is where your Claude API key lives. First, create the API key: go to console.anthropic.com → Settings → API Keys → + Create Key, copy the key (it starts with `sk-ant-` and is shown only once), then save it in n8n under Settings → Credentials → Add Credential → Anthropic API.

n8n · Basic LLM Chain node

1 Add the AI node

Basic LLM Chain

BLC Basic LLM ChainAI node

2 Attach a Claude model underneath

Anthropic Chat Model
claude-haiku-4 · cheapest, fast

3 Write your prompt in the Prompt field

Here are recent Bluesky posts mentioning our brand. Summarise overall sentiment in 2-3 sentences. Then list any posts that need an urgent reply (complaints, direct questions). Posts: {{ $json.postText }}

ReturnsSentiment: mostly positive. 2 posts need replies: [1] …

4 Credential setup

API Keysk-ant-… (paste from Anthropic Console)

Modelclaude-haiku-4

Use Haiku to keep costs low — under $0.01 per daily run

Send the digest to Slack

Add a Slack node as the final step. Connect your Slack workspace using the Sign in with Slack button inside the node — n8n opens a browser pop-up to authorise access. Choose the Send a message operation, pick the channel (e.g. `#marketing`), and set the message text to the output of the Claude node using an expression.

n8n · Slack node

1 Add the output node

Slack

S SlackApp node

ST Slack TriggerApp node

2 Configure the message

ResourceMessage

OperationSend a message

Channel#marketing

Message text{{ $json.text }} — (expression pointing to Claude output)

3 Activate the workflow so it runs on schedule

Activate workflow

What you get

Every morning n8n fetches the latest 25 Bluesky posts mentioning your brand, Claude summarises the mood and flags any posts that need a reply, and the whole digest lands in your chosen Slack channel before the team starts the day. Total cost is near zero — n8n Cloud free trial, Claude Haiku at fractions of a cent per run, and Slack's free tier. Rough effort: ~1.5 hours to build, free tiers throughout. Claude Haiku costs roughly $0.001 per daily run. n8n Cloud free trial included..