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Version: 0.11.0

MCP-008: Protocol Version Mismatch - MCP

Summary​

  • Rule ID: MCP-008
  • Severity: MEDIUM
  • Category: MCP
  • Normative Level: SHOULD
  • Auto-Fix: Yes (unsafe)
  • Verified On: 2026-02-04

Applicability​

  • Tool: all
  • Version Range: unspecified
  • Spec Revision: 2025-06-18

Evidence Sources​

Test Coverage Metadata​

  • Unit tests: true
  • Fixture tests: true
  • E2E tests: false

Examples​

The following examples demonstrate what triggers this rule and how to fix it.

Invalid​

{
  "jsonrpc": "2.0",
  "method": "initialize",
  "id": 1,
  "params": {
    "protocolVersion": "2024-11-05",
    "clientInfo": { "name": "my-client", "version": "1.0.0" }
  }
}

Valid​

{
  "jsonrpc": "2.0",
  "method": "initialize",
  "id": 1,
  "params": {
    "protocolVersion": "2025-06-18",
    "clientInfo": { "name": "my-client", "version": "1.0.0" }
  }
}