# MCP specification — full timeline

9 tracked releases from 2024-11-06 to 2026-07-28.

## 2026

- **2026-07-28** `2026-07-28` sig 5 — [MCP spec: 2026-07-28 revision goes stable](https://changelogs.info/mcp-spec/2026-07-28)
- **2026-05-29** `2026-07-28-RC` sig 3 — [MCP spec: 2026-07-28 release candidate published](https://changelogs.info/mcp-spec/2026-07-28-rc)

## 2025

- **2025-11-25** `2025-11-25` sig 5 — [MCP spec: 2025-11-25 revision goes stable](https://changelogs.info/mcp-spec/2025-11-25)
- **2025-11-15** `2025-11-25-RC` sig 3 — [MCP spec: 2025-11-25 release candidate published](https://changelogs.info/mcp-spec/2025-11-25-rc)
- **2025-06-18** `2025-06-18` sig 5 — [MCP specification: 2025-06-18 revision published](https://changelogs.info/mcp-spec/2025-06-18)
- **2025-03-26** `2025-03-26` sig 5 — [MCP specification: 2025-03-26 revision published](https://changelogs.info/mcp-spec/2025-03-26)
- **2025-03-26** `2024-11-05-final` sig 2 — [MCP specification: 2024-11-05 revision finalised](https://changelogs.info/mcp-spec/2024-11-05-final)
- **2025-01-17** `2024-11-05` sig 4 — [Model Context Protocol: initial 2024-11-05 specification revision](https://changelogs.info/mcp-spec/2024-11-05)

## 2024

- **2024-11-06** `2024-10-07` sig 1 — [MCP specification 2024-10-07: final update, no described changes](https://changelogs.info/mcp-spec/2024-10-07)

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Canonical: https://changelogs.info/mcp-spec/timeline