# mcp-spec-version

> MCP current spec revision — 2025-11-25 spec date (JSON-RPC 2.0)

_State of the Agentic Web · /state-of-the-agentic-web/mcp-spec-version · [JSON](/api/state-of-the-agentic-web/mcp-spec-version) · [all State of the Agentic Web](/state-of-the-agentic-web)_

- **metric:** MCP current spec revision
- **metric_family:** protocol-maturity
- **measures_pillar:** /protocols
- **entity_measured:** MCP
- **value:** 2025-11-25
- **unit:** spec date (JSON-RPC 2.0)
- **date:** 2025-11
- **period:** 2026-Q2
- **figure_kind:** cited
- **source:** https://modelcontextprotocol.io/specification/2025-11-25
- **trend:** up
- **last_verified:** 2026-06-15