Change8 MCP Server

Change8 MCP

Breaking Change Alerts for AI Agents

Know what broke before your code does.

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❌ Without Change8

You upgrade a dependency and your code breaks. LLMs don't know:

• ❌ That pydantic v2 removed the .dict() method
• ❌ That langchain moved ChatOpenAI to a new package
• ❌ What migration steps you need to take

You waste hours debugging and searching through changelogs.

✅ With Change8

Change8 MCP gives AI agents instant access to structured breaking change data for hundreds of popular packages.

Example prompt:

I'm upgrading langchain from 0.1 to 0.2. What breaking changes should I know about?

Change8 responds with:

• Breaking changes with exact details
• Migration steps to fix your code
• Affected symbols (functions, classes, modules)

No more searching through changelogs. No more surprise production failures.

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Installation

Cursor

Add to your ~/.cursor/mcp.json:

{
  "mcpServers": {
    "change8": {
      "command": "npx",
      "args": ["-y", "@change8/mcp"]
    }
  }
}

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "change8": {
      "command": "npx",
      "args": ["-y", "@change8/mcp"]
    }
  }
}

Claude Code

claude mcp add change8 -- npx -y @change8/mcp

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Available Tools

Tool	Description
get_breaking_changes	Get breaking changes for a package. Use when you need to know what broke.
diff_versions	Get all changes between two versions. Use when upgrading from v1 to v2.
search_symbol	Find releases that affected a function/class. Use when you see deprecation warnings.

Example Usage

Get breaking changes:

What are the breaking changes in the latest Pydantic releases?

Compare versions:

What changed between React 17 and React 18?

Search by symbol:

Which releases affected the ChatOpenAI class?

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Tracked Packages

Change8 tracks hundreds of packages including:

Category	Packages
AI/ML	LangChain, OpenAI, Transformers, PyTorch, Anthropic
Backend	FastAPI, Pydantic, Django, Flask, Express
Frontend	React, Next.js, Vue, Svelte, Angular
Infra	Docker, Kubernetes, Terraform, Cloudflare

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Request a Package

Don't see your package? Open an issue to request it.

We add new packages within 24 hours.

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How It Works

1. Daily Scraping: We pull release notes from GitHub for popular packages
2. AI Extraction: We use LLMs to extract structured data (breaking changes, migrations, affected symbols)
3. Instant Access: MCP gives AI agents direct access to this intelligence

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License

MIT