Building Slack agents can be easy — Vercel News

Slack is already where teams work. It provides a natural interface for agents, with messages, threads, buttons, and events, so you don't need to invent a new UI or onboarding flow. Getting from "I want a Slack agent" to a running deployment, though, means coordinating across a lot of systems:

• Creating an app in the Slack API console

• Configuring OAuth scopes and event subscriptions

• Writing webhook handlers and signature verification

• Deploying to infrastructure that can handle Slack's 3-second response window

Each piece has its own docs, and they all need to work together. Coding agents like Claude Code, OpenCode, Cursor, and GitHub Copilot are well suited for exactly this kind of coordination because they can read docs, reason through dependencies, and generate code in seconds. We built the Slack agent skill (https://github.com/vercel-labs/slack-agent-skill) to take advantage of that. It builds on our Slack Agent Template (https://vercel.com/templates/nitro/slack-agent-template), works with the coding agent of your choice, and takes you from idea to a deployed Slack agent on Vercel in a single session, automating steps when possible and showing you exactly what to click when it can't. From idea to deployed agent with the skill wizardInstall the skill and run the wizard: Then run the skill in your agent. For example, with Claude Code: The wizard starts by asking what kind of agent you want to build. You might say "a support agent that answers questions from our internal docs," or "a standup bot that collects updates from the team every morning." Based on your answer, it generates a custom implementation plan tailored to your use case. You review and approve the plan before any code is written. From there, you move through five stages:

• Project setup: You choose your LLM provider, and the agent scaffolds your project from our Slack Agent Template (https://github.com/vercel-partner-solutions/slack-agent-template).

• Slack app creation: The agent customizes your manifest.json with your app name, description, and bot display settings, then opens Slack's console and walks you through creating the app and installing it to your workspace. OAuth scopes, event subscriptions, and slash commands come pre-configured from the template.

• Environment configuration: The agent walks you through setting up your signing secret, bot token, and any API keys your project needs.

• Local testing: The agent starts your dev server and connects it to Slack so you can message your bot and see it respond in real time before anything touches production.

• Production deployment: The agent walks you through deploying to Vercel and setting up your environment variables. From this point, every git push triggers a new deployment.

What the skill gives youThe Slack agent skill gives you an agent that can:

• Hold multi-turn conversations across messages and threads

• Pause for human approval before taking sensitive actions

• Stream responses to Slack in real time

• Read channels and threads on its own

Your agent interacts with Slack and your systems through tools, functions it can call to take actions or retrieve information. The template ships with tools for:

• Reading channel messages

• Fetching thread context

• Joining channels (with human approval)

• Searching channels by name, topic, or purpose

You can also tell your coding agent to add custom tools that connect to your own systems. Want the agent to look up a customer record, create a support ticket, or query a database? Each of those becomes a tool the agent knows when and how to call. Workflow DevKit is what makes the agent durable. A Slack agent often needs to hold a conversation across many messages, or wait hours for someone to approve a request. Workflow DevKit lets the agent suspend mid-conversation, wait for external input, and pick back up exactly where it left off. Tool calls are automatically retried on failure, and responses stream back to Slack in real time. Human-in-the-loop is built in. When the agent needs to perform a sensitive action like joining a channel, it posts a message with Approve and Reject buttons and suspends. You're only billed for active CPU time (https://vercel.com/docs/functions/usage-and-pricing#active-cpu), so waiting costs nothing, even if approval takes days. This pattern extends to any action requiring approval, from sending messages to modifying data to calling external APIs. AI Gateway gives your agent access to hundreds of models from every major provider through a single API key. Switching models is a one-line change, and if a provider goes down, AI Gateway automatically routes to another so your agent stays up. Going deeperOnce your agent is live, there are a few ways to extend it and understand it better. Our Vercel Academy Slack Agents course (https://vercel.com/academy/slack-agents) covers the entire lifecycle, from creating and configuring a Slack app to handling events and interactive messages, building agents with the AI SDK, and deploying to production. Vercel preview deployments let you test changes before they reach production. For Slack bots, this may require bypassing deployment protection so Slack's webhook verification can reach your endpoint. Our testing guide (https://vercel.com/kb/guide/test-slack-bot-with-vercel-preview-deployment) explains how to set this up. Vercel Sandboxes (https://vercel.com/sandbox) let your agent execute code in isolated environments, so it can run user-provided scripts like analyzing a spreadsheet, generating a chart, or transforming data without risking your infrastructure. Get startedThe whole experience fits in one session with your coding agent.

• Slack Agent Skill

• Slack Agent Template

• Vercel Academy: Slack Agents

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