{
  "title": "MCP Product Protocol-Version Disclosure Matrix",
  "schemaVersion": "1.0",
  "researchFreeze": "2026-08-26",
  "protocolRevision": "2026-07-28",
  "limitation": "Vendor documentation is a dated disclosure audit, not an interoperability test or blanket support certification.",
  "count": 11,
  "records": [
    {
      "id": "R7-HOST01",
      "product": "Claude Desktop",
      "organization": "Anthropic",
      "mcpRole": "Host containing clients",
      "exactProtocolRevisionStated": "Not established in reviewed public product source",
      "legacyCompatibility": "Product-specific; live check",
      "transports": "Local and remote support documented across Anthropic sources",
      "keyLimitation": "Product support can differ from protocol and SDK support",
      "packageSourceIds": [
        "S073"
      ],
      "sourceIds": [
        "S145"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST02",
      "product": "Claude Code",
      "organization": "Anthropic",
      "mcpRole": "Host/client; can also expose itself as a server",
      "exactProtocolRevisionStated": "Not established in reviewed public page",
      "legacyCompatibility": "Product-specific; live check",
      "transports": "Local and remote MCP documented",
      "keyLimitation": "Role varies by mode; exact wire revision must be tested",
      "packageSourceIds": [
        "S074"
      ],
      "sourceIds": [
        "S259"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST03",
      "product": "ChatGPT developer mode",
      "organization": "OpenAI",
      "mcpRole": "Host with remote MCP connector support",
      "exactProtocolRevisionStated": "Not stated in reviewed help article",
      "legacyCompatibility": "Not established",
      "transports": "Remote connections; product-specific connector path",
      "keyLimitation": "A claim of MCP support does not establish every optional capability or revision",
      "packageSourceIds": [
        "S075"
      ],
      "sourceIds": [
        "S140"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST04",
      "product": "OpenAI Agents SDK",
      "organization": "OpenAI",
      "mcpRole": "Application framework/client manager",
      "exactProtocolRevisionStated": "Not consistently stated in overview",
      "legacyCompatibility": "Legacy SSE option documented alongside newer transports",
      "transports": "Hosted MCP, Streamable HTTP, stdio, legacy SSE",
      "keyLimitation": "Framework mode and server transport affect behavior",
      "packageSourceIds": [
        "S076"
      ],
      "sourceIds": [
        "S090"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST05",
      "product": "VS Code",
      "organization": "Microsoft",
      "mcpRole": "Host/client",
      "exactProtocolRevisionStated": "Not stated as one canonical date in reviewed product docs",
      "legacyCompatibility": "Product-specific; supports modern features and varied transports",
      "transports": "Local stdio and remote HTTP",
      "keyLimitation": "Feature support can roll out independently of spec publication",
      "packageSourceIds": [
        "S077"
      ],
      "sourceIds": [
        "S141"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST06",
      "product": "GitHub Copilot coding agent",
      "organization": "GitHub",
      "mcpRole": "Cloud host/client",
      "exactProtocolRevisionStated": "Not stated",
      "legacyCompatibility": "Not established",
      "transports": "Product-configured remote/server integrations",
      "keyLimitation": "Capabilities restricted; not all resources/prompts/OAuth behavior available",
      "packageSourceIds": [
        "S078"
      ],
      "sourceIds": [
        "S265"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST07",
      "product": "Cursor",
      "organization": "Cursor",
      "mcpRole": "Host/client",
      "exactProtocolRevisionStated": "Not stated in reviewed product page",
      "legacyCompatibility": "Not established",
      "transports": "Local and remote server configuration",
      "keyLimitation": "Need product-level interoperability test",
      "packageSourceIds": [
        "S079"
      ],
      "sourceIds": [
        "S269"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST08",
      "product": "Gemini CLI",
      "organization": "Google",
      "mcpRole": "Host/client",
      "exactProtocolRevisionStated": "Not stated in reviewed overview",
      "legacyCompatibility": "Not established",
      "transports": "Local and remote integrations documented",
      "keyLimitation": "Feature support and revision should be verified through release notes/tests",
      "packageSourceIds": [
        "S080"
      ],
      "sourceIds": [
        "S144"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST09",
      "product": "JetBrains AI Assistant",
      "organization": "JetBrains",
      "mcpRole": "Host/client",
      "exactProtocolRevisionStated": "Not stated as a date",
      "legacyCompatibility": "Legacy SSE documented in addition to stdio and Streamable HTTP",
      "transports": "stdio, Streamable HTTP, legacy SSE",
      "keyLimitation": "Transport list does not prove all protocol capabilities",
      "packageSourceIds": [
        "S081"
      ],
      "sourceIds": [
        "S274"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST10",
      "product": "Zed",
      "organization": "Zed Industries",
      "mcpRole": "Host/client",
      "exactProtocolRevisionStated": "Not stated in reviewed product source",
      "legacyCompatibility": "Not established",
      "transports": "Context server/MCP integration",
      "keyLimitation": "Use live product docs and interoperability tests",
      "packageSourceIds": [
        "S082"
      ],
      "sourceIds": [
        "S284"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    },
    {
      "id": "R7-HOST11",
      "product": "MCP Inspector v2",
      "organization": "Model Context Protocol",
      "mcpRole": "Diagnostic client/host-like developer tool",
      "exactProtocolRevisionStated": "Explicit legacy/modern protocol-era support",
      "legacyCompatibility": "Yes, protocol-era selector/negotiation",
      "transports": "Multiple developer-test transports",
      "keyLimitation": "Inspector support is not evidence that another host supports the same feature",
      "packageSourceIds": [
        "S083"
      ],
      "sourceIds": [
        "S297"
      ],
      "statusDate": "2026-08-26",
      "currentStatusRequiresLiveCheck": true
    }
  ]
}