{"version":"2.1.248","anchor":"mcp-protocol-versions-listed-in-negotiation-order","canonical_anchor":"mcp-protocol-versions-listed-in-negotiation-order","heading":"MCP protocol versions listed in negotiation order","tier":"internal","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248\/e\/mcp-protocol-versions-listed-in-negotiation-order","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248","markdown":"### MCP protocol versions listed in negotiation order\n\nThe MCP client lists its supported protocol versions in descending preference, including two newer symbolic ones.\n\n**What**\n\nThe MCP client now carries an explicit list of the protocol versions it supports, \"2025-06-18\", \"2025-03-26\", \"2024-11-05\", \"2024-10-07\", preceded by two newer symbolic versions, giving a clear descending preference order when negotiating with a server.\n\n**Evidence**\n\n`\"2025-06-18\", \"2025-03-26\", \"2024-11-05\", \"2024-10-07\"`\n\n- Area: MCP\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 3\/5"}