{"generatedAt":"2026-10-24T12:11:27.697Z","canonicalUrl":"https://agentbreakwatch.vercel.app/p/mcp-server-everything","llmsTxtUrl":"https://agentbreakwatch.vercel.app/p/mcp-server-everything/llms.txt","categoryHub":{"slug":"official-reference","title":"Official Reference MCP Servers Stability & Migration Index","url":"https://agentbreakwatch.vercel.app/c/official-reference"},"tldrVerdict":"MCP Everything Conformance Server (@modelcontextprotocol/server-everything) is currently at v2.0.0 on NPM (published 2026-10-19), with a 90-day Stability Score of 86/100 (B+) and MEDIUM schema drift risk. Major v2.0.0 release aligns test tools, prompts, and resources with MCP 2025-11-25 / 2026 spec features including elicitation and audio blocks.","package":{"slug":"mcp-server-everything","packageName":"@modelcontextprotocol/server-everything","registry":"npm","kind":"mcp","subcategory":"Official Reference MCP","displayName":"MCP Everything Conformance Server","vendor":"Model Context Protocol","githubRepo":"modelcontextprotocol/servers","breakingSummary":"Major v2.0.0 release aligns test tools, prompts, and resources with MCP 2025-11-25 / 2026 spec features including elicitation and audio blocks.","schemaDriftRisk":"medium","affectedSymbols":["echo","annotatedMessage","getResourceReference","startElicitation"],"migrationBefore":"npx -y @modelcontextprotocol/server-everything sse","migrationAfter":"npx -y @modelcontextprotocol/server-everything streamableHttp","description":"MCP server that exercises all the features of the MCP protocol","latestVersion":"2.0.0","latestPublishedAt":"2026-10-19T06:50:03.188Z","recentVersions":[{"version":"2.0.0","publishedAt":"2026-10-19T06:50:03.188Z"},{"version":"1.0.0","publishedAt":"2026-10-11T02:45:40.915Z"},{"version":"2026.8.31","publishedAt":"2026-08-31T20:23:50.168Z"},{"version":"2026.8.18","publishedAt":"2026-08-18T16:06:16.850Z"},{"version":"2026.7.4","publishedAt":"2026-07-04T23:05:18.837Z"},{"version":"2026.1.26","publishedAt":"2026-01-27T09:25:57.675Z"}],"releasesLast90d":4,"dependenciesCount":7,"license":"SEE LICENSE IN LICENSE","registryUrl":"https://www.npmjs.com/package/@modelcontextprotocol/server-everything","githubUrl":"https://github.com/modelcontextprotocol/servers","installCommand":"npx -y @modelcontextprotocol/server-everything@2.0.0","stabilityScore":86,"stabilityGrade":"B+"}}