{"generatedAt":"2026-10-24T12:11:27.697Z","canonicalUrl":"https://agentbreakwatch.vercel.app/p/modelcontextprotocol-conformance","llmsTxtUrl":"https://agentbreakwatch.vercel.app/p/modelcontextprotocol-conformance/llms.txt","categoryHub":{"slug":"mcp-bridges-devtools","title":"MCP Bridges, Transports, Inspectors & Developer Tools","url":"https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools"},"tldrVerdict":"Modelcontextprotocol Conformance (@modelcontextprotocol/conformance) is currently at v0.1.16 on NPM (published 2026-03-30), with a 90-day Stability Score of 73/100 (C+) and HIGH schema drift risk. Built on MCP SDK (^1.27.1); recent release v0.1.16 (up from v0.1.15) updates MCP DevTool / Inspector tool schemas and transport handling (0 releases in last 90d). Pin exact version v0.1.16 in .mcp.json to avoid silent parameter drift.","package":{"slug":"modelcontextprotocol-conformance","packageName":"@modelcontextprotocol/conformance","registry":"npm","kind":"mcp","subcategory":"MCP DevTool / Inspector","displayName":"Modelcontextprotocol Conformance","vendor":"Model Context Protocol","githubRepo":"modelcontextprotocol/conformance","breakingSummary":"Built on MCP SDK (^1.27.1); recent release v0.1.16 (up from v0.1.15) updates MCP DevTool / Inspector tool schemas and transport handling (0 releases in last 90d). Pin exact version v0.1.16 in .mcp.json to avoid silent parameter drift.","schemaDriftRisk":"high","affectedSymbols":["conformance","tools/list","tools/call"],"migrationBefore":"\"modelcontextprotocol-conformance\": {\n  \"command\": \"npx\",\n  \"args\": [\"-y\", \"@modelcontextprotocol/conformance@latest\"]\n}","migrationAfter":"\"modelcontextprotocol-conformance\": {\n  \"command\": \"npx\",\n  \"args\": [\"-y\", \"@modelcontextprotocol/conformance@0.1.16\"]\n}","description":"A framework for testing MCP (Model Context Protocol) client and server implementations against the specification.","latestVersion":"0.1.16","latestPublishedAt":"2026-03-30T20:26:52.731Z","recentVersions":[{"version":"0.1.16","publishedAt":"2026-03-30T20:26:52.731Z"},{"version":"0.1.15","publishedAt":"2026-02-20T14:43:27.119Z"},{"version":"0.1.14","publishedAt":"2026-02-13T19:14:50.474Z"},{"version":"0.1.13","publishedAt":"2026-02-05T16:13:00.482Z"},{"version":"0.1.12","publishedAt":"2026-01-30T09:59:00.262Z"},{"version":"0.1.11","publishedAt":"2026-01-23T18:56:36.268Z"}],"releasesLast90d":0,"dependenciesCount":9,"license":"MIT","registryUrl":"https://www.npmjs.com/package/@modelcontextprotocol/conformance","githubUrl":"https://github.com/modelcontextprotocol/conformance","installCommand":"npx -y @modelcontextprotocol/conformance@0.1.16","stabilityScore":73,"stabilityGrade":"C+"}}