Docs / Plugin Setup Guide

Sanity

GROQ queries, real-time collaboration.

MCP Config

{
  "servers": {
    "Sanity": {
      "type": "http",
      "url": "https://mcp.sanity.io"
    }
  }
}

Contentful

GraphQL / REST API, structured content.

MCP Config

{
  "servers": {
    "Contentful": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@contentful/mcp-server"]
    }
  }
}

Strapi

Open-source headless CMS.

MCP Config

{
  "servers": {
    "Strapi": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "strapi-mcp"]
    }
  }
}

Supabase

Postgres + Auth + RLS + Edge Functions.

MCP Config

{
  "servers": {
    "Supabase": {
      "type": "http",
      "url": "https://mcp.supabase.com/mcp"
    }
  }
}

Convex

Reactive backend with real-time sync.

MCP Config

{
  "servers": {
    "Convex": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "convex@latest", "mcp", "start"]
    }
  }
}

Prisma

Type-safe ORM with migrations and schema management.

MCP Config

{
  "servers": {
    "Prisma": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@anthropic/prisma-mcp@latest"]
    }
  }
}

Next.js

React framework with App Router, Server Components, and MCP devtools.

MCP Config

{
  "servers": {
    "next-devtools": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "next-devtools-mcp@latest"]
    }
  }
}

Astro

Content-driven web framework with islands architecture.

MCP Config

{
  "servers": {
    "Astro docs": {
      "type": "http",
      "url": "https://mcp.docs.astro.build/mcp"
    }
  }
}

Vercel

Deployment and hosting platform.

MCP Config

{
  "servers": {
    "Vercel": {
      "type": "http",
      "url": "https://mcp.vercel.com"
    }
  }
}

Netlify

Deployment, serverless functions, edge config.

NETLIFY_AUTH_TOKEN="your-token-here"

MCP Config

{
  "servers": {
    "Netlify": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "netlify-mcp@latest"]
    }
  }
}

NX

Monorepo build system.

MCP Config

{
  "servers": {
    "NX": {
      "type": "stdio",
      "command": "npx",
      "args": ["nx", "mcp"]
    }
  }
}

Turborepo

Monorepo build system with remote caching.

Vitest

Vite-native unit and integration testing.

Playwright

Cross-browser E2E testing by Microsoft.

MCP Config

{
  "servers": {
    "Playwright": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@playwright/mcp@latest"]
    }
  }
}

Cypress

E2E and component testing in the browser.

Chrome DevTools

Browser testing, screenshots, DOM inspection.

MCP Config

{
  "servers": {
    "chrome-devtools": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "chrome-devtools-mcp@latest"]
    }
  }
}

Linear

Issue tracking with MCP integration.

LINEAR_API_KEY="lin_api_your-key-here"

Detailed setup guide →

MCP Config

{
  "servers": {
    "Linear": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@mseep/linear-mcp"],
      "envFile": "${workspaceFolder}/.env"
    }
  }
}

Jira

Atlassian issue tracking via Rovo MCP.

MCP Config

{
  "servers": {
    "Jira": {
      "type": "http",
      "url": "https://mcp.atlassian.com/v1/mcp"
    }
  }
}

Slack

Connect the @kazuph/mcp-slack MCP server so your AI agents can post progress updates, request approvals, and read responses — all through Slack channels.

1. Create a Slack App

1. Go to api.slack.com/apps
2. Click Create New App → From scratch
3. Name it something like OpenCastle Agents and select your workspace
4. Click Create App
5. In the left sidebar, go to App Home and enable "Allow users to send Slash commands and messages from the messages tab"

2. Configure Bot Token Scopes

1. In your Slack app settings, go to OAuth & Permissions
2. Scroll down to Bot Token Scopes
3. Add the scopes listed below

Minimum (agent notifications)

Recommended (full MCP server capabilities)

3. Get Your Bot Token

1. Still in your Slack app settings, scroll to the top of the OAuth & Permissions page
2. Click Install to Workspace (or Reinstall to Workspace if you've already installed it before adding scopes)
3. Authorize the app when prompted
4. Copy the Bot User OAuth Token (xoxb-…) that appears at the top of the page

Add the token to your .env file:

SLACK_MCP_XOXB_TOKEN="xoxb-your-token-here"

4. MCP Config

VS Code — ensure .vscode/mcp.json includes (automatic if you ran npx opencastle init with Slack enabled):

{
  "servers": {
    "Slack": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@kazuph/mcp-slack"],
      "envFile": "${workspaceFolder}/.env",
      "env": {
        "SLACK_MCP_ADD_MESSAGE_TOOL": "true"
      }
    }
  }
}

Cursor — the Slack server appears from .cursor/mcp.json (auto-generated by npx opencastle init). Open Cursor Settings → MCP → Enable.

Claude Code — reads config from .claude/mcp.json (auto-generated). Run claude mcp list to verify.

5. Verify

Ask your AI assistant:

"List my Slack channels using the Slack MCP tools"

If it returns a list of channels, the connection is working.

Troubleshooting

"missing_scope" error — Go back to your Slack app's OAuth & Permissions → Bot Token Scopes, add the missing scope(s), then click Reinstall to Workspace.

"not_authed" / "invalid_auth" — Check that your .env contains SLACK_MCP_XOXB_TOKEN with a valid xoxb-… token, wrapped in quotes with no trailing whitespace.

Bot can't see channels — Invite the bot to the channel: /invite @OpenCastle Agents.

Can't post messages — Ensure SLACK_MCP_ADD_MESSAGE_TOOL=true is set in your MCP config's env block.

"Sending messages to this app has been turned off" — Go to Slack app settings → App Home → enable "Allow users to send Slash commands and messages from the messages tab".

Microsoft Teams

Agent notifications via Teams channels.

MCP Config

{
  "servers": {
    "Microsoft Teams": {
      "type": "http",
      "url": "https://agent365.svc.cloud.microsoft/agents/tenants/${input:tenant_id}/servers/mcp_TeamsServer"
    }
  }
}

Figma

Design tokens, component specs, asset export.

FIGMA_ACCESS_TOKEN="your-token-here"

MCP Config

{
  "servers": {
    "Figma": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@anthropic/figma-mcp@latest"],
      "envFile": "${workspaceFolder}/.env"
    }
  }
}

Resend

Transactional email API with React templates.

RESEND_API_KEY="re_your-key-here"

MCP Config

{
  "servers": {
    "Resend": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "resend-mcp"],
      "envFile": "${workspaceFolder}/.env"
    }
  }
}