{"generatedAt":"2026-10-24T12:11:27.697Z","canonicalUrl":"https://agentbreakwatch.vercel.app/p/langchain-mcp-adapters","llmsTxtUrl":"https://agentbreakwatch.vercel.app/p/langchain-mcp-adapters/llms.txt","categoryHub":{"slug":"agent-sdks","title":"AI Agent SDKs & Frameworks Breaking-Change Index","url":"https://agentbreakwatch.vercel.app/c/agent-sdks"},"tldrVerdict":"LangChain MCP Adapters (@langchain/mcp-adapters) is currently at v2.0.1 on NPM (published 2026-10-06), with a 90-day Stability Score of 78/100 (B) and HIGH schema drift risk. v2.0 requires @langchain/core >= 1.0 and @modelcontextprotocol/sdk >= 1.20; MultiServerMCPClient transport config enforces explicit transport type.","package":{"slug":"langchain-mcp-adapters","packageName":"@langchain/mcp-adapters","registry":"npm","kind":"sdk","subcategory":"MCP Core SDK","displayName":"LangChain MCP Adapters","vendor":"LangChain","githubRepo":"langchain-ai/langchainjs","breakingSummary":"v2.0 requires @langchain/core >= 1.0 and @modelcontextprotocol/sdk >= 1.20; MultiServerMCPClient transport config enforces explicit transport type.","schemaDriftRisk":"high","affectedSymbols":["MultiServerMCPClient","loadMcpTools"],"migrationBefore":"const client = new MultiServerMCPClient({ math: { command: \"node\", args: [\"server.js\"] } });\nawait client.initializeConnections();","migrationAfter":"const client = new MultiServerMCPClient({\n  mcpServers: { math: { transport: \"stdio\", command: \"node\", args: [\"server.js\"] } }\n});\nconst tools = await client.getTools();","description":"LangChain.js adapters for Model Context Protocol (MCP)","latestVersion":"2.0.1","latestPublishedAt":"2026-10-06T00:47:45.106Z","recentVersions":[{"version":"2.0.1","publishedAt":"2026-10-06T00:47:45.106Z"},{"version":"2.0.0","publishedAt":"2026-10-01T01:16:28.271Z"},{"version":"1.1.4","publishedAt":"2026-08-20T01:16:28.841Z"},{"version":"1.1.3","publishedAt":"2026-02-12T03:09:33.622Z"},{"version":"1.1.2","publishedAt":"2026-01-22T21:00:48.145Z"},{"version":"1.1.1","publishedAt":"2025-12-18T22:41:01.689Z"}],"releasesLast90d":3,"dependenciesCount":3,"license":"MIT","registryUrl":"https://www.npmjs.com/package/@langchain/mcp-adapters","githubUrl":"https://github.com/langchain-ai/langchainjs","installCommand":"npm install @langchain/mcp-adapters@2.0.1","stabilityScore":78,"stabilityGrade":"B"}}