Marketing & Content

Reddit Trend Digest

Monitors specified subreddits for trending topics, hot discussions, and relevant mentions.

Toolkits Needed

You'll need access to these toolkits in your Arcade MCP Gateway:

Slack

GoogleDocs

Setup Guide

Sign up for Arcade

Create a free Arcade account to get access to MCP Gateway.

Create Arcade Account →

Create a new MCP Gateway

Navigate to MCP Gateway page in Arcade, then click Create MCP Gateway.

Provide a slug that becomes your MCP URL (this is what LangSmith Fleet will discover automatically):

Example: If you choose slug my-agent, your MCP URL will be:
https://api.arcade.dev/mcp/my-agent

Select the specific tools you need

Arcade MCP Gateway gives you fine-grained control over exactly which tools your agent can access. Select these specific tools from the toolkits:

Reddit.GetPostsInSubreddit

Reddit.CheckSubredditAccess

Reddit.GetContentOfPost

Slack.SendMessage

Slack.ListConversations

Slack.GetMessages

GoogleDocs.CreateDocumentFromText

GoogleDocs.GetDocumentAsDocmd

GoogleDocs.EditDocument

Why this matters: Instead of granting access to entire toolkits with hundreds of tools, you're selecting only the 9 specific tools this agent actually needs. This precision reduces risk and keeps your agent focused.

Open LangSmith Fleet and connect Arcade

Arcade is available as a native integration in LangSmith Fleet. Open LangSmith, navigate to Integrations in the left sidebar, then select Arcade under the Apps section. Click Connect to link your Arcade account.

Open LangSmith Fleet →

Select Arcade from the Apps sidebar in LangSmith Fleet and click Connect

Click Connect, then click Allow to authorize Arcade. Your gateways will be discovered automatically.

Create your agent

Create a new agent in LangSmith Fleet using the system prompt below and link your Arcade integration.

View the system prompt

Copy this system prompt and paste it into the "System Prompt" field when creating your agent in LangSmith Fleet:

Agent System Prompt

You are a Reddit Trend Digest agent that monitors subreddits and surfaces insights.

## Your Capabilities
- Browse and search subreddits
- Get post content and discussions
- Send summaries via Slack
- Create digest documents in Google Docs

## Workflow
1. **Monitor** - Check specified subreddits for trending content
2. **Analyze** - Read post content and identify key themes
3. **Summarize** - Create digestible summaries of top discussions
4. **Deliver** - Send digest via Slack or save to Google Docs

## Example Interactions
**User:** "What's trending in r/artificial this week?"
**Agent:** I'll check r/artificial for hot posts and discussions. Here's what I found:

1. **[Post Title]** - 500 upvotes - Discussion about [topic]
2. **[Post Title]** - 300 upvotes - Community debate on [topic]

Want me to send this digest to Slack or create a Google Doc?

## Guidelines
- Focus on high-engagement posts
- Summarize key discussion points
- Identify emerging trends
- Respect subreddit rules and context

Add Arcade tools to your agent

In your agent, click Add tools and select the Arcade tools from your connected gateway. Your gateway exposes only the specific tools you configured:

Reddit.GetPostsInSubreddit

Reddit.CheckSubredditAccess

Reddit.GetContentOfPost

Slack.SendMessage

Slack.ListConversations

Slack.GetMessages

GoogleDocs.CreateDocumentFromText

GoogleDocs.GetDocumentAsDocmd

GoogleDocs.EditDocument

Selecting Arcade tools in LangSmith Fleet

Start using your agent!

That's it! Your agent is now connected to Arcade's tools. Start chatting with your agent to test it out.

You're all set!

Try It: Example Prompt

Once your agent is set up, try this example prompt to test it:

Example Query

Give me a digest of the top posts from r/startups and r/entrepreneur from the past week. Send the summary to our #trends Slack channel.

Best For

Market ResearchersProduct ManagersContent Strategists

Get access to Arcade, and start building now.

Docs